CPSGT Practice Quiz 2020 Aasm

The Multiple Sleep Latency Test (MSLT) is primarily used for patients with suspected narcolepsy and for patients who are super sleepy. The MSLT measures the time it takes for a person to fall asleep during the day and is used to evaluate excessive daytime sleepiness and to diagnose narcolepsy. It is also used for patients who are excessively sleepy to determine the cause of their sleepiness. Therefore, options A and C are correct as they both mention the primary uses of the MSLT.

Alpha activity refers to the brain waves that occur when a person is in a relaxed but awake state. These brain waves have a frequency range of 8 Hz to 13 Hz. This frequency range is associated with a calm and relaxed mental state, often observed during meditation or when a person is daydreaming.

Beta activity refers to the brainwaves that occur at a frequency of greater than 13 Hz. This frequency range is associated with alertness, focus, and active thinking. It is often observed during periods of concentration, problem-solving, and cognitive tasks.

Although the patient is given 4-5 different nap opportunities, their goal is to see if the patient can stay awake in under stimulating circumstances. Think semi truck drivers. This testing is also a good indicator for patients who have treated narcolepsy.

The statement is false. Alpha waves are not exclusive to pediatric patients. Alpha waves are a type of brain wave that occur in the frequency range of 8-13 Hz and can be observed in individuals of all ages, not just pediatric patients.

The reasons why PLMS should not be scored include if they are isolated, aperiodic movements, if they are followed by respiratory events, and if there is muscle activity during REM. Additionally, PLMS should not be scored if there are less than 5 events per hour. Therefore, all of the above reasons should be considered for not scoring PLMS.

When scoring respiratory events for pediatrics, it is true that you need 2 skipped breaths for scoring. This means that if a child skips two breaths during a respiratory event, it is considered significant and should be scored accordingly. This scoring system helps healthcare professionals assess the severity and frequency of respiratory events in pediatric patients.

The International Classification of Sleep Disorders broke down the 85 sleep disorders into 7 categories.

Hypoxia refers to a condition where there is a decrease in the levels of oxygen (O2) in the body. This can occur due to various reasons such as high altitudes, lung diseases, or respiratory problems. When there is a decrease in the levels of oxygen, it can lead to symptoms like shortness of breath, confusion, dizziness, and even loss of consciousness. Therefore, the answer "Decreased levels of O2" accurately describes hypoxia as it highlights the main characteristic of this condition.

The aftermath of ventilation - the actual chemical exchange

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A notch filter, also known as a 60 Hz filter, is used to remove noise specifically from electrical sources without affecting other frequencies. This type of filter is commonly used in applications where electrical interference or hum at the 60 Hz frequency needs to be eliminated, such as in audio systems or power supplies. By selectively attenuating the noise at this specific frequency, the notch filter allows for cleaner and clearer signals to be transmitted or processed.

The PONs is located on the brain steam - small and ball shaped. It sends signals to the spinal cord causing temporary paralysis.

The term "mixed" in the context of this question refers to a type of apnea where there is a combination of both absent effort in the initial portion of the event and resumption of effort in the second portion of the event. In other words, during a mixed apnea, there is a period of no breathing effort followed by a period of resumed breathing effort.

To diagnose severe sleep apnea, a patient would need to experience more than 30 events. This means that the patient would need to have more than 30 episodes of breathing pauses or shallow breathing during sleep, known as apneas or hypopneas. These events are typically measured using a sleep study, which monitors the patient's breathing patterns and oxygen levels during sleep. If the patient experiences fewer than 30 events, they may be diagnosed with a milder form of sleep apnea or another sleep disorder.

To validate HSAT Level 3 testing, it is necessary to include airflow and effort channels. These parameters are crucial in monitoring and evaluating the respiratory function of the individual undergoing the test. Airflow channels measure the flow of air in and out of the respiratory system, providing insights into any breathing abnormalities. Effort channels, on the other hand, measure the effort exerted during breathing, helping to identify any respiratory muscle weakness or inefficiency. Including both airflow and effort channels ensures a comprehensive assessment of the patient's respiratory function, making the HSAT Level 3 testing more accurate and reliable.

They also reduce SOL and WASO, and increase TST and apnea frequency and durations.

They should NOT be scored if following an apnea or hypopnea.

PSG amplifier filters and settings allow the interpreter to accentuate normal activity and clean up or eliminate garbage. This means that the filters and settings can enhance the clarity of the signals related to normal activity while removing any unwanted or irrelevant signals, improving the overall quality of the interpretation.

The sensitivity control adjusts the size of the activity being displayed. This means that by increasing or decreasing the sensitivity, the displayed activity can be made larger or smaller. It does not control the frequency or speed of the activity being displayed, nor does it control the volume of a car radio.

The correct answer is 1 apneas, 1 hypopnea, 3 RERAS, 1 snoring. This answer is likely correct because it follows a pattern of increasing numbers for each type of event (apneas, hypopneas, RERAS, snoring), and the numbers are not too high or too low. This suggests that it is a reasonable manual titration level for pediatrics. However, without further context or information about the specific guidelines or standards for pediatric titration, it is difficult to provide a definitive explanation.

Alpha activity refers to a specific brain wave pattern that occurs when a person is in a relaxed and wakeful state with closed eyes. When the eyes are open, the brain transitions into a more active state known as beta activity. Therefore, it is true that alpha activity disappears when the eyes are open in beta.

The AASM (American Academy of Sleep Medicine) recommends a low frequency filter (LFF) setting of 10 Hz and a high frequency filter (HFF) setting of 100 Hz for EMG (electromyography) activity. This means that any signals below 10 Hz or above 100 Hz will be filtered out or attenuated. This specific LFF and HFF setting range is suggested to effectively capture and analyze EMG activity during sleep studies or other related procedures.

The correct answer is 2 apneas, 3 hypopneas, 5 RERAS, 3 snoring. This answer suggests that the manual titration levels for adults include a certain number of apneas, hypopneas, RERAS (Respiratory Effort-Related Arousals), and snoring events. These events are used to assess the severity of sleep-disordered breathing and determine the appropriate treatment for the individual.

Hypercapnea is a medical condition characterized by abnormally high levels of carbon dioxide (CO2) in the blood. This can occur due to various reasons such as hypoventilation, lung diseases, or impaired gas exchange. Elevated CO2 levels can lead to symptoms like shortness of breath, confusion, headaches, and even respiratory failure in severe cases. Monitoring and managing CO2 levels are crucial in treating hypercapnea and underlying conditions.

During a PSG (Polysomnography), a total of 26 electrodes are placed on the body. These electrodes are used to monitor and record various physiological activities such as brain waves, eye movements, muscle activity, heart rate, and breathing patterns. Additionally, there is also a ground electrode that is placed to ensure proper electrical grounding and minimize interference. Therefore, the total number of electrodes placed on the body during a PSG is 26 + ground.

Ventilation refers to the act of air entering and exiting the lungs. It involves the process of inhaling oxygen and exhaling carbon dioxide. This exchange of gases is essential for maintaining proper oxygen levels in the body and removing waste gases. Ventilation is facilitated by the contraction and relaxation of respiratory muscles, which enable the movement of air in and out of the lungs.

There are over 85 sleep disorders that have been identified and classified by experts in the field. These disorders can range from insomnia and sleep apnea to narcolepsy and restless leg syndrome. Each disorder has its own unique symptoms and treatment options. It is important to consult a sleep clinician to accurately diagnose and treat any sleep disorder that an individual may be experiencing.

An indicator that a sleep stage is N1 or Stage R is a low chin EMG. EMG stands for electromyogram, which measures muscle activity. During N1 sleep stage or Stage R (REM sleep), the muscles are typically relaxed, leading to a low level of muscle activity. Therefore, a low chin EMG reading would suggest that the sleep stage is either N1 or Stage R.

basic understanding of this cardiac cycle is necessary before discussing abnormal heart rhythms

The MSLT (Multiple Sleep Latency Test) is a measure of the ability or tendency to fall asleep. It is conducted by monitoring a person's sleep patterns and recording the time it takes for them to fall asleep in a controlled environment. This test is commonly used to diagnose sleep disorders such as narcolepsy and assess the effectiveness of treatment options.

Hypoxia is a condition characterized by decreased levels of oxygen (O2) in the body. This can occur due to various reasons such as high altitudes, lung diseases, or impaired oxygen delivery to the tissues. In hypoxia, the body's cells and tissues do not receive an adequate amount of oxygen, which can lead to symptoms like shortness of breath, fatigue, and confusion. Therefore, the correct answer is O2.

Narcolepsy is a neurological disorder with an extreme tendency to fall asleep at any time with abnormal REM sleep. It can result in the loss of muscle tone and can be initiated by strong emotions.

The statement is false because Stage N3, also known as deep sleep or slow-wave sleep, has the highest threshold of wake during the night. This stage is characterized by the lowest brain activity and it is difficult to wake someone up during this stage.

A differential amplifier is used to produce and measure the voltage difference between two signals of each input. This voltage difference is then amplified and displayed as a channel of EEG activity.

A high-pass filter (HFF) is a type of electronic filter that allows frequencies above a certain cut-off frequency to pass through while attenuating frequencies below the cut-off. In this case, the answer states that HFFs allow all frequencies below the cut-off to pass unchanged, which means that the filter does not affect or attenuate those frequencies.

There must be a >/= 3% desaturation to score a hypopnea. Additionally, all criteria must be met to score a hypopnea.

respiration can also typically be AC

Babies only have Stage 3 and REM sleep because their sleep patterns are different from adults. Stage 3 sleep, also known as deep sleep, is crucial for growth and development in infants. During this stage, the body repairs and regenerates tissues, strengthens the immune system, and releases growth hormones. REM sleep, on the other hand, is important for brain development and cognitive function. It is characterized by rapid eye movements and vivid dreaming. These two stages of sleep are essential for the healthy development of babies.

The hypothalamus is part of the RAS. it controls NREM sleep. it may be the region responsible for keeping track of our sleep debt.

High Pass Filters (HPF) are designed to allow all frequencies above the cut-off frequency to pass through unchanged. This means that any signal with a frequency higher than the cut-off frequency will not be attenuated or filtered out. However, frequencies below the cut-off will be attenuated or blocked, effectively reducing their amplitude or removing them from the signal. In other words, the HPF allows high-frequency components to pass through while attenuating or blocking low-frequency components.

this can result in lower desaturations and longer respiratory events

The AASM (American Academy of Sleep Medicine) recommends using HFF (high-frequency filter) settings of 500 Hz for EMG (electromyography) activity. Additionally, a LFF (low-frequency filter) setting of 200 Hz is recommended. These settings help to accurately capture and analyze the EMG activity during sleep studies.

The AASM (American Academy of Sleep Medicine) recommends using a high-frequency filter (HFF) setting of 500 Hz for ECG/EKG activity. This setting helps to remove noise and interference from the signal. Additionally, a low-frequency filter (LFF) setting of 200 Hz is recommended to eliminate baseline wander and other low-frequency artifacts. Using these specific HFF settings ensures that the ECG/EKG recordings are clear and accurate.

Theta brainwaves are commonly observed in younger (pediatric) patients. Theta activity is associated with deep relaxation, daydreaming, and the early stages of sleep. It is also seen during creative and imaginative activities, as well as during periods of focused attention. In younger patients, theta waves may be more prevalent due to their developing brains and higher levels of imagination and creativity. Therefore, theta is the main activity seen in younger patients.

PLMD stands for Periodic Limb Movement Disorder. This disorder is characterized by involuntary and repetitive movements of the legs during sleep. These movements can range from subtle twitches to more pronounced jerking motions. PLMD is often associated with Restless Legs Syndrome (RLS), a condition that causes uncomfortable sensations in the legs and an overwhelming urge to move them. Both PLMD and RLS can disrupt sleep and lead to daytime fatigue and other related symptoms.

The correct answer is 8 cm H20 / 10 cm H20. This means that the minimum Inspiratory Positive Airway Pressure (IPAP) for pediatrics under 12 years old is 8 cm H20, while the maximum IPAP is 10 cm H20. IPAP is a measure of the pressure applied during inhalation to help keep the airways open and improve breathing. It is important to note that this answer may vary depending on the specific guidelines or protocols followed in different healthcare settings.

Delta activity refers to the brain waves that are associated with deep sleep and unconsciousness. These brain waves have a frequency range of 0.5 Hz to 4 Hz, which means they oscillate at a rate of 2 to 4 cycles per second. This frequency range is characteristic of the slowest and highest amplitude brain waves, indicating a state of deep relaxation and rest.

Parasomnias, which are abnormal behaviors or experiences during sleep, typically occur during Stage N3 of sleep. This stage is also known as slow-wave sleep or deep sleep, and it is characterized by slow brain waves and deep relaxation. Parasomnias can include sleepwalking, night terrors, and sleep talking, among others. During Stage N3, it is common for individuals to experience these types of sleep disturbances.

The examples provided in the question are all related to sleep disorders or abnormal breathing during sleep. Sleep Disordered Breathing (SDB) refers to a group of conditions characterized by disruptions in normal breathing patterns during sleep. Abnormal breathing patterns, such as pauses in breathing or shallow breathing, are common symptoms of SDB. OSA, or Obstructive Sleep Apnea, is a specific type of SDB where the airway becomes partially or completely blocked during sleep, leading to pauses in breathing. Snoring is another common symptom of SDB, often associated with OSA.

Wake promoting agents like Modafinil (Alertec - Canada, Provigil - US) have multiple effects on a PSG (polysomnography) test. They can decrease sleepiness scores, meaning they help to reduce feelings of drowsiness and increase alertness. They also decrease SOL (sleep onset latency), which refers to the time it takes to fall asleep. Additionally, they decrease wake time, meaning they help to decrease the amount of time spent awake during sleep. Lastly, these agents do not cause any changes to sleep architecture, meaning they do not alter the overall structure or pattern of sleep stages. Therefore, the correct answer is "All of the above."

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Acetylcholine is the correct answer because it is the primary neurotransmitter that controls the REM stage of sleep. During REM sleep, the brain is highly active and acetylcholine plays a crucial role in regulating this state. It is responsible for promoting the activation of various brain regions, including the hippocampus and cortex, which are involved in memory consolidation and dreaming. Acetylcholine also helps to suppress muscle activity during REM sleep, ensuring that the body remains still and immobile. Serotonin and noradrenaline are involved in other aspects of sleep regulation but do not specifically control the REM stage.

They MUST include airflow and effort

According to the AASM (American Academy of Sleep Medicine) scoring rules for NREM (non-rapid eye movement) sleep, to classify an event as an arousal, it must meet the following criteria: there should be an abrupt shift in EEG frequency (such as Alpha, Theta, or frequencies greater than 16Hz), the shift should last at least 3 seconds, and there should be at least 10 seconds of stable sleep before and after the change. Therefore, the given answer correctly includes all the necessary criteria for scoring arousal in NREM sleep according to AASM guidelines.

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PLMS stands for Periodic Limb Movement Syndrome. This condition is characterized by involuntary leg movements during sleep. These movements can range from simple twitches to more complex and repetitive movements. PLMS can disrupt sleep and lead to daytime fatigue and sleepiness. It is often associated with restless legs syndrome (RLS), a condition characterized by uncomfortable sensations in the legs and an irresistible urge to move them. Treatment options for PLMS may include medications, lifestyle changes, and addressing any underlying medical conditions contributing to the symptoms.

The minimum and maximum IPAP for adults is 8 cm H2O and 30 cm H2O respectively.

The thalamus is a relay station in the brain that receives sensory information from various parts of the body and sends it to the appropriate areas in the cerebral cortex for further processing. It is also responsible for generating many of the brain rhythms during N Rem sleep, which is a stage of sleep characterized by rapid eye movement. Therefore, options A and B are both correct as they accurately describe the functions of the thalamus.

There are no changes in sleep, however, you may see an increased heart rate. It is suggested to not take 30 minutes before bedtime.

The AASM recommends using a high-frequency filter (HFF) setting of 500 Hz for EEG/EOG activity. This means that any signals above 500 Hz will be filtered out. Additionally, a low-frequency filter (LFF) setting of 200 Hz is recommended. This means that any signals below 200 Hz will be filtered out. These settings are important for obtaining accurate and reliable EEG/EOG recordings, as they help to eliminate unwanted noise and artifacts from the signal.

A patient would need less than 5 events to be diagnosed with mild sleep apnea. This means that if a patient experiences less than 5 instances of interrupted breathing during sleep, they would be classified as having mild sleep apnea.

Xanax and Valium are medications that can increase beta activity. These drugs belong to the class of benzodiazepines, which are known to have a stimulating effect on the brain's beta waves. Beta waves are associated with alertness, concentration, and active thinking. Xanax and Valium work by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA), which helps to regulate the excitability of neurons in the brain. By increasing the activity of beta waves, these medications can potentially improve cognitive function and promote wakefulness. Rispordal and Pentasa, on the other hand, are not known to have any direct effect on beta activity.

Theta activity is associated with a state of deep relaxation and creativity. During theta activity, the brainwaves slow down, which is considered normal. Therefore, the given statement that slowing is normal during theta activity is true.

Alpha activity refers to a type of brain wave activity that occurs during a relaxed and awake state. These waves are typically found in the posterior region of the head, which is commonly referred to as the "back" of the head. The repetition of "back, Back, BACK" in the answer emphasizes that the correct location for alpha activity is indeed the back of the head.

The given answer states that 10% of sleep is spent in N1 - Non REM 1. This means that out of the total sleep duration, 10% of it is spent in the first stage of non-rapid eye movement sleep. N1 is the lightest stage of sleep where individuals are easily awakened and may experience muscle twitches.

A montage refers to the configuration of all the channels that you want to include in your study. It is the arrangement of electrodes or channels on the scalp or body to record specific brain activities or physiological signals. This configuration is important for obtaining accurate and relevant data during a study or experiment.

The AASM (American Academy of Sleep Medicine) guidelines for REM (Rapid Eye Movement) arousal scoring include specific criteria. One of the criteria is the requirement of at least a 1-second change in EMG (Electromyogram) activity. This indicates a significant change in muscle activity during REM sleep. Another criterion is the presence of an abrupt shift in EEG (Electroencephalogram) activity, which indicates a sudden change in brain wave patterns. These scoring rules help in identifying and quantifying arousals during REM sleep.

The AASM scoring rules for limb movements state that a movement must have a duration of 0.5 - 10 seconds, with a minimum amplitude increase of 8 uV. Each movement is scored if it is part of a sequence of 4 movements. The scoring period should be a minimum of 5 seconds and a maximum of 90 seconds. These criteria must be met in order to accurately score limb movements according to the AASM guidelines.

The maximum EPAP for adults is 4 cm H20. EPAP stands for expiratory positive airway pressure and is a setting on a positive airway pressure machine that helps keep the airways open during sleep. A higher EPAP can be uncomfortable for patients, so it is important to find the right level for each individual. In this case, the correct answer is 4 cm H20, indicating that this is the maximum pressure that should be used for adults.

The homeostatic mechanism refers to the body's ability to regulate and maintain a stable internal environment. In the context of sleep, it is responsible for regulating sleep intensity. This means that it helps to ensure that the quality and depth of sleep are maintained at an appropriate level. The homeostatic mechanism works in conjunction with other factors, such as the circadian rhythm, to regulate sleep-wake cycles and ensure that the body gets the right amount and quality of sleep needed for optimal functioning.

The given answer, 20%, suggests that during sleep, 20% of the time is spent in Stage N2 - Non REM 3. This stage is a part of non-rapid eye movement sleep and is characterized by the presence of both sleep spindles and K-complexes in the brainwave activity. It is a deeper stage of sleep compared to N1 and N2, but not as deep as N3 (also known as slow-wave sleep). This stage is important for consolidating memories, restoring energy, and promoting overall physical and mental health.

HSAT level 3 testing requires the inclusion of channels that measure Effort and Airflow. These channels are essential for monitoring the respiratory effort and airflow during sleep. By measuring these parameters, the test can provide valuable information about the quality of sleep and potential sleep disorders. The inclusion of O2 Saturations and Heart rate channels may be useful for additional monitoring and analysis, but they are not mandatory for HSAT level 3 testing.

The correct answer includes the 7 categories of sleep disorders as identified by the ICSD3. These categories are Insomnia, Parasomnias, Other, Circadian Rhythm Disorders, Sleep Related Breathing Disorders, Central Disorders of Hypersomnolence (Narcolepsy), and Sleep Related Movement Disorders.

Ventricular fibrillation is a life-threatening cardiac arrhythmia characterized by the rapid and chaotic contraction of the ventricles. In this condition, there are no discernible P or QRS waves on an electrocardiogram (ECG) due to the disorganized electrical activity in the ventricles. The heart rate can range from 300 to 600 beats per minute, and the rhythm is extremely irregular. Despite the absence of effective contractions and blood flow, there is still some electrical activity present, which allows for the possibility of restoring a normal rhythm through defibrillation.

The correct answer includes Zopiclone (Imovane), Zaleplon (Sonata - USA), Zolpidem (Ambien - USA), and Eszopiclone (Lunesta). These medications are examples of non-benzodiazepines that are commonly used for sleep disorders. They work by targeting specific receptors in the brain to promote sleep and are often prescribed for short-term use to help with insomnia. Dexedrine, Valium, and Ativan are not examples of non-benzodiazepines and are used for different purposes such as attention deficit hyperactivity disorder (ADHD) and anxiety.

A capnograph is a graphic waveform of CO2 in a given time consent. It provides the estimated tidal volume. Capnography is used to record end tidal CO2. The measurement of CO2 changes during ventilation. We use an oximeter to measure SPO2 using a finger probe. Whereas, a more invasive measurement, sao2, is taken during an ABG.

Sensory neurons are receptors that inform the CNS of stimuli - think of being poked by a pin. Effectors are muscles and glands that take action - think knee jerk reaction.

As CO2 increases and reaches the set point, inspiration is initiated to eliminate C02 and bring in 02.

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The normal adult heart rate is 60- 100 bpm, and are counted using the R waves. If the SA node takes a break manager takes over, if manager takes a break, the extra staff take over and can cause many different rhythms.

The reticular activating system (RAS) is primarily affected by drugs that keep us awake or make us sleepy. The RAS is a network of neurons located in the brainstem that plays a crucial role in regulating wakefulness and arousal. Drugs that stimulate the RAS can increase alertness and keep us awake, while drugs that inhibit the RAS can induce sleepiness and drowsiness.

Dopaminergic Agents like Mirapex and Requip are used to treat RLS and Parkinsons disease.

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Beta activity is typically recorded in the center or front of the head.

Sensitivity - S
uV input signal voltage - V
Amplitude - A

Caffeine can have several negative effects on sleep. It can increase sleep onset latency (SOL), which means it takes longer to fall asleep. It can also increase wake after sleep onset (WASO), causing more frequent awakenings during the night. Caffeine can increase the amount of time spent in stage 1 sleep, which is the lightest stage of sleep. It can also increase sleep fragmentation, leading to a more disrupted and less restful sleep. Additionally, caffeine can increase leg movements during sleep. Overall, caffeine can decrease total sleep time (TST) and decrease the amount of REM sleep, which is important for restorative sleep.

The given explanation suggests that the PR interval consistently gets longer with each beat, but it is not significantly long enough to indicate a significant blockage. This pattern is characteristic of a 1st Degree AV Block, where there is a delay in the conduction of electrical signals from the atria to the ventricles.

The given description states that the P waves in this block always occur at the same rhythm and at exactly the same distance, while the QRS complex has a random rhythm. This pattern is compared to a marriage that is over and there is no communication between the partners. This description matches the characteristics of a 3rd Degree Block, also known as a complete heart block, where there is a complete dissociation between the atria and the ventricles. The atria and ventricles beat independently of each other, resulting in a random rhythm for the QRS complex.

This heart block is characterized by a PR interval that progressively lengthens until a beat is dropped at random. It can potentially progress to a complete heart block. Various factors such as medications, infection, hypoxemia, and scar tissues from surgery can contribute to this condition. In 2nd Degree Mobitz 2, not every QRS complex is preceded by a P wave.

Medications like Dexedrine and Ritalin is under stimulants.

Anti depressants can have several effects on sleep. They can prolong REM latency, which means it takes longer for REM sleep to occur. They can also increase total NREM sleep, which is non-rapid eye movement sleep. Additionally, anti depressants can decrease total REM sleep, which is rapid eye movement sleep. They can also cause increased motor restlessness, such as periodic limb movement syndrome (PLMS) and bruxism. Another effect is an increase in REM density, which can result in "prozac eyes." Lastly, anti depressants can decrease total sleep time (TST) and increase sleep fragmentation.

The correct answer includes examples of 'Other' sleep disorders such as disorders that cannot be classified in the other 6 categories of the ICSD-3, overlapping of 2 disorders, medical or psychiatric conditions, alcoholism, and panic attacks. These examples are different types of sleep disorders that do not fit into specific categories or overlap with other disorders. They can be caused by various factors including underlying medical or psychiatric conditions, substance abuse, or specific symptoms like panic attacks.

Unifocal PVCs refer to premature ventricular contractions that have the same appearance and occur in the same place in the heart. On the other hand, multifocal PVCs are premature ventricular contractions that have different appearances and occur in different places in the heart.

Abnormal is a disturbance of impulse formation. Something may be wrong with the SA node. There is a distance of pulse induction, and can be too fast or too slow.

In 2nd Degree Block Mobitz 1, there is a progressive lengthening of the PR interval until a QRS complex is dropped. This pattern is characterized by a repeating cycle of lengthening PR intervals followed by a dropped QRS complex. Therefore, the given explanation aligns with the characteristics of 2nd Degree Block Mobitz 1, where the QRS complex is dropped after a progressive lengthening of the PR interval.

Restless Leg Syndrome (RLS) and Periodic Leg Movements (PLMs) are two sleep-related movement disorders. RLS is a condition characterized by an uncontrollable urge to move the legs, usually accompanied by uncomfortable sensations. PLMs, on the other hand, refer to repetitive leg movements during sleep that can disrupt sleep patterns. Both conditions can cause discomfort and sleep disturbances, leading to daytime fatigue and other related symptoms.