Midbrain Lesions & Neurotransmitters
This lecture is given by Dr. Leo. It is titled neurotransmitters on mediasite but it is really on midbrain lesions. . . Carryon!. . . Wait some of it is neurotransmitters!
- 1.
Midbrain lesion with paralysis of upward gaze
- A.
Parinaud's syndrome
- B.
Benedikt's syndrome
- C.
Weber's syndrome
Correct Answer
A. Parinaud's syndromeExplanation
Parinaud's syndrome is a condition characterized by paralysis of upward gaze, which is consistent with the given correct answer. This syndrome is caused by a lesion in the midbrain, specifically affecting the vertical gaze centers. Other symptoms may include pupillary abnormalities, convergence-retraction nystagmus, and eyelid retraction.Rate this question:
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- 2.
This syndrome knocks out the red nucleus?
- A.
Parinauds syndrome
- B.
Benedikts syndrome
- C.
Webers syndrome
Correct Answer
B. Benedikts syndromeExplanation
damages the 3rd nerveRate this question:
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- 3.
Lesion by the posterior commissure can cause this...
- A.
Paralysis of downward gaze
- B.
Paralysis of upward gaze
- C.
Paralysis of lateral gaze
- D.
Paralysis of medial gaze
Correct Answer
B. Paralysis of upward gazeExplanation
Lesion by the posterior commissure can cause paralysis of upward gaze. The posterior commissure is a structure in the brain that is involved in the control of eye movements. When it is damaged or affected by a lesion, it can result in the inability to move the eyes upward. This is known as paralysis of upward gaze. The other options, paralysis of downward gaze, lateral gaze, and medial gaze, are not associated with lesions in the posterior commissure.Rate this question:
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- 4.
This midbrain lesion creates a contralateral tremor &Â ipsilateral 3rd nerve palsy
- A.
Parinauds syndrome
- B.
Benedikts syndrome
- C.
Weber's syndrome
Correct Answer
B. Benedikts syndromeExplanation
Benedikt's syndrome is a midbrain lesion that presents with a contralateral tremor and an ipsilateral third nerve palsy. This combination of symptoms is characteristic of Benedikt's syndrome. Parinaud's syndrome, on the other hand, is characterized by vertical gaze palsy and pupillary abnormalities, while Weber's syndrome is characterized by a contralateral hemiparesis and ipsilateral oculomotor nerve palsy. Therefore, the correct answer is Benedikt's syndrome.Rate this question:
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- 5.
This midbrain lesion results in contralateral UMN signs and ipsilateral 3rd nerve palsy
- A.
Parinauds syndrome
- B.
Benedikts syndrome
- C.
Webers syndrome
Correct Answer
C. Webers syndromeExplanation
Weber's syndrome is a midbrain lesion that presents with contralateral upper motor neuron (UMN) signs and ipsilateral third nerve palsy. This means that there will be weakness and spasticity on the side opposite to the lesion, along with paralysis of the eye muscles on the same side as the lesion. Therefore, Weber's syndrome is the correct answer.Rate this question:
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- 6.
The raphe nucleus produces this
- A.
Epinephrinie
- B.
Norepinephrine
- C.
Serotonin
- D.
Dopamine
Correct Answer
C. SerotoninExplanation
The raphe nucleus is known to produce serotonin. Serotonin is a neurotransmitter that plays a role in regulating mood, sleep, appetite, and other important functions in the brain. It is involved in various physiological processes and is often associated with feelings of well-being and happiness. Serotonin is also targeted by many antidepressant medications, as imbalances in serotonin levels have been linked to depression and other mood disorders. Therefore, it is reasonable to conclude that the raphe nucleus produces serotonin.Rate this question:
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- 7.
The locus ceruleus produces
- A.
Epinephrine
- B.
Norepinephrine
- C.
Serotonin
- D.
GABA
Correct Answer
B. NorepinepHrineExplanation
The locus ceruleus is a small nucleus in the brainstem that is responsible for producing and releasing norepinephrine. Norepinephrine is a neurotransmitter that plays a role in various functions such as attention, arousal, and stress response. It is involved in regulating mood, sleep, and heart rate. Therefore, it is the correct answer because the locus ceruleus is known for producing norepinephrine, not epinephrine, serotonin, or GABA.Rate this question:
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- 8.
This drug was initially given as an antihistamine but it was noted to cause depression with correlation of lower serotonin levels
- A.
Iproniazid
- B.
Reserpine
- C.
Imipramine
Correct Answer
B. ReserpineExplanation
1st piece of the puzzleRate this question:
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- 9.
This drug was initially given to pts with TB. It calmed the pts down so they gave it to patients in psych wards. They then noticed that the drug was blocking MAO
- A.
Ipraniazid
- B.
Imipramine
- C.
Reserpine
Correct Answer
A. IpraniazidExplanation
Also known as marsilidRate this question:
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- 10.
Used as an antihistamine in depressed pts. Noticed that it blocked uptake of norepinephrine
- A.
Ipraniazid
- B.
Imipramine
- C.
Reserpine
Correct Answer
B. ImipramineExplanation
Also know as tofranilRate this question:
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- 11.
Depression is due to a lowering of this molecule?
- A.
Norepinephrine
- B.
Epinephrine
- C.
Serotonin
- D.
Dopamine
Correct Answer
C. SerotoninExplanation
Depression is often associated with a decrease in serotonin levels. Serotonin is a neurotransmitter that plays a crucial role in regulating mood, emotions, and sleep. When serotonin levels are low, it can lead to feelings of sadness, hopelessness, and a lack of interest in activities. Therefore, a lowering of serotonin is believed to contribute to the development of depression.Rate this question:
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Mar 20, 2023Quiz Edited by
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Mar 23, 2010Quiz Created by
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