GROSS ANATOMY

GROSS ANATOMY

BRAIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
White fiber tracts communicating between hemispheres
A
pons
B
pineal gland
C
corpus callosum
D
cerebellum
E
medulla oblongata
Explanation: 

Detailed explanation-1: -Commissural fibers-interconnect between both hemispheres to allow communication. Their bands link the hemispheres and include the corpus callosum and anterior commissure. There are over 200 million axons in the corpus callosum (the largest commissure), which can carry about 4 billion impulses per second.

Detailed explanation-2: -Commissural tracts cross from one cerebral hemisphere to the other through bridges called commissures. The great majority of commissural tracts pass through the large corpus callosum.

Detailed explanation-3: -The corpus callosum is defined under the category of commissural fibers; that is, it interconnects corresponding structures in the left hemisphere with the right hemisphere. The largest bundle of these fibers is called the corpus callosum (Fig. 13-1, A).

Detailed explanation-4: -The corpus callosum is the largest commissural tract in the human brain. It consists of about 200-300 million axons that connect the two cerebral hemispheres. The corpus callosum is essential to the communication between the two hemispheres.

Detailed explanation-5: -Although the corpus callosum can be seen as a single large fiber bundle connecting the two hemispheres, a number of individual fiber tracts can be identified. These include: genu: forceps minor connects medial and lateral surfaces of the frontal lobes. rostrum: connecting the orbital surfaces of the frontal lobes.

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