Brain And Brainstem Overview Question And Answers

Brain And Brainstem Overview Question And Answers

Question 1. Define the brain and enumerate its major parts.

Answer. The brain is that part of the CNS which lies within the cranial cavity (hence it is also called cranial cargo). The brain weighs about 1400 g in males and 1200 g in females. The brain is the highest centre for various sensory and motor functions of the body. It is also the seat of intelligence, cognizance, memory, emotions, etc.

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Major Parts Of The Brain The brain consists of six major parts:

• The cerebrum consists of two cerebral hemispheres.
• The diencephalon consists of the thalamus, hypothalamus, metathalamus, subthalamus, and epithalamus
• Midbrain
• Pons
• Medulla oblongata
• Cerebellum

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Question 2. Enumerate the main structures seen in the transverse section of the midbrain at the level of the superior colliculus.

Answer: The main structures seen in the transverse section of the midbrain at the level of the superior colliculus are as follows:

• Oculomotor nucleus
• Red nucleus
• Nucleus of the superior colliculus
• Dorsal tegmental decussation (of Meynert)
• Ventral tegmental decussation (of Forel)

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