Drgawad Online Physiology Exams: EEG, Sleep, Thalamus, Hypothalamus, Limbic System

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| By Drgawadghhhsghh

Drgawadghhhsghh

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Quizzes Created: 2 | Total Attempts: 944

Questions: 7 | Attempts: 391 | Updated: Mar 21, 2023

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. 7 MCQs
7 Marks
7 min

Questions and Answers

1.

Regarding thalamic syndrome, which is true
- A.
  
  Loss of epicretic sensations of the same side of the body
- B.
  
  The face sensations are markedly affected
- C.
  
  Pain is well localized
- D.
  
  Pain is following the all or nothing principle
Correct Answer
D. Pain is following the all or nothing principle

Explanation
The statement "pain is following the all or nothing principle" means that in thalamic syndrome, the perception of pain is either completely absent or extremely intense, with no middle ground. This suggests that the thalamus, which is responsible for relaying sensory information to the brain, is not functioning properly. This can result in a loss of epicretic sensations (sensations of touch, pressure, and temperature) on the same side of the body, as well as marked effects on face sensations. However, the statement does not provide any information about the localization of pain or its relationship to the body's midline.

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2.

Regarding hypothalamus function, which is true:
- A.
  
  Feeding center is chronically active
- B.
  
  Stimulation of anterior hypothalamus increases arousal state
- C.
  
  Posterior hypothalamus is concerned with heat loss
- D.
  
  Anterior hypothalamus is concerned with sympathetic control
Correct Answer
A. Feeding center is chronically active

Explanation
The statement "feeding center is chronically active" means that the hypothalamus is constantly involved in regulating feeding behavior. The hypothalamus plays a crucial role in controlling appetite and satiety through the release of various hormones and neurotransmitters. It monitors nutrient levels in the body and triggers hunger or fullness signals accordingly. This constant activity of the feeding center ensures that the body's energy needs are met and helps maintain a balance in food intake.

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3.

Regarding hypothalamic functions, which is true
- A.
  
  During Sham rage reaction the activated nucleus is the anterior hypothalamus
- B.
  
  Hypothalamus has regulatory control of all endocrinal glands except the ovaries
- C.
  
  Ant hypothalamus stimulation causes low heart rate
- D.
  
  The weather is raining, so the anterior hypothalamus is active
Correct Answer
C. Ant hypothalamus stimulation causes low heart rate

Explanation
The statement "ant hypothalamus stimulation causes low heart rate" is true. The anterior hypothalamus is involved in regulating the autonomic nervous system, which controls various bodily functions including heart rate. Stimulation of the anterior hypothalamus can lead to a decrease in heart rate.

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4.

Regarding hunger control, which is true
- A.
  
  Satiety center is chronically active
- B.
  
  The main regulator of satiety center activity is the blood amino acids level
- C.
  
  Obesity may occur due to destruction of ventromedial nucleus of the hypothalamus
- D.
  
  None of the above
Correct Answer
C. Obesity may occur due to destruction of ventromedial nucleus of the hypothalamus

Explanation
The destruction of the ventromedial nucleus of the hypothalamus can lead to obesity. This is because the ventromedial nucleus is responsible for regulating satiety and controlling hunger. When this area is damaged, it can disrupt the normal signaling and feedback mechanisms that regulate food intake, leading to overeating and weight gain.

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5.

Regarding REM sleep, which is true:
- A.
  
  Heart rate is regular
- B.
  
  Respiratory rate is regular
- C.
  
  Muscle tone is markedly increased
- D.
  
  Dreams can be consolidated
Correct Answer
D. Dreams can be consolidated

Explanation
During REM (Rapid Eye Movement) sleep, the brain is highly active and vivid dreaming occurs. This is the stage of sleep where dreams are most likely to be remembered. Consolidation refers to the process of strengthening and integrating new memories into existing knowledge and long-term memory storage. Studies have shown that REM sleep plays a crucial role in the consolidation of memories, particularly those related to procedural learning and emotional experiences. Therefore, it is true that dreams can be consolidated during REM sleep.

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6.

Regarding non-REM sleep, which is false:
- A.
  
  Drop of blood pressure
- B.
  
  Decrease in heart rate
- C.
  
  Dreams are consolidated
- D.
  
  Decrease in peripheral vascular tone
Correct Answer
C. Dreams are consolidated

Explanation
During non-REM sleep, dreams are not consolidated. Dreams are more commonly associated with REM (rapid eye movement) sleep, which is a different stage of sleep. Non-REM sleep is characterized by a decrease in heart rate, a drop in blood pressure, and a decrease in peripheral vascular tone.

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7.

Which of the following is considered as a sleeping center:
- A.
  
  Locus ceruleus
- B.
  
  Anterior hypothalamus
- C.
  
  Posterior hypothalamus
- D.
  
  Basal forebrain
Correct Answer
B. Anterior hypothalamus

Explanation
The anterior hypothalamus is considered as a sleeping center. It is responsible for regulating sleep and wakefulness. It contains neurons that release inhibitory neurotransmitters, promoting sleep. Stimulation of the anterior hypothalamus can lead to drowsiness and sleep, while damage to this area can cause insomnia.

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Current Version
Mar 21, 2023

Quiz Edited by
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Dec 09, 2016

Quiz Created by
Drgawadghhhsghh

Drgawad Online Physiology Exams: EEG, Sleep, Thalamus, Hypothalamus, Limbic System

Regarding thalamic syndrome, which is true

Regarding hypothalamus function, which is true:

Regarding hypothalamic functions, which is true

Regarding hunger control, which is true

Regarding REM sleep, which is true:

Regarding non-REM sleep, which is false:

Which of the following is considered as a sleeping center: