PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The frontal lobe
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The amygdala
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The corpus callosum
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The retina
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Detailed explanation-1: -The corpus callosum is the largest white matter structure in the brain, consisting of 200–250 million contralateral axonal projections and the major commissural pathway connecting the hemispheres of the human brain.
Detailed explanation-2: -There are approximately 300 million axons (nerve fibres) in an average corpus callosum. It is located in the white matter of the cerebrum and is around 10cm long at the midline. This neural bridge is the largest white matter structure in the brain and only evolved in placental mammals.
Detailed explanation-3: -White matter is found in the deeper tissues of the brain (subcortical). It contains nerve fibers (axons), which are extensions of nerve cells (neurons). Many of these nerve fibers are surrounded by a type of sheath or covering called myelin. Myelin gives the white matter its color.