Textbook Question
Which three pairs of descending tracts make up the corticospinal pathway?
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12. The Central Nervous System
Introduction to the Central Nervous System
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What structure connects the right and left cerebral hemispheres?
A
Corpus callosum
B
Medulla oblongata
C
Thalamus
D
Cerebellum
Verified step by step guidance1
Begin by identifying the function of each structure listed in the options. Understanding their roles will help determine which one connects the cerebral hemispheres.
The corpus callosum is a large band of nerve fibers that connects the left and right cerebral hemispheres, facilitating communication between them.
The medulla oblongata is part of the brainstem and is involved in autonomic functions such as breathing and heart rate regulation, not in connecting hemispheres.
The thalamus acts as a relay station for sensory and motor signals to the cerebral cortex, but it does not connect the hemispheres.
The cerebellum is responsible for coordination and balance, and it is located under the cerebral hemispheres, not connecting them.
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