The structure that connects the two cerebral hemispheres is the
(A) suprachiasmatic nucleus
(B) hippocampus
C basal nuclei
(D) corpus callosum
The correct answer and explanation is:
The correct answer is (D) corpus callosum.
The corpus callosum is the structure that connects the two cerebral hemispheres. It is a large bundle of nerve fibers located deep within the brain that allows communication between the left and right sides of the brain. This connection is essential for the integration of sensory, motor, and cognitive functions that require coordination between both hemispheres.
Each hemisphere of the brain is responsible for different functions. For example, the left hemisphere typically handles language, logic, and analytical tasks, while the right hemisphere is more involved with spatial awareness, creativity, and intuition. The corpus callosum plays a critical role in ensuring that these functions are synchronized. Without it, there could be difficulty in coordinating tasks that require both sides of the brain to work together.
The suprachiasmatic nucleus (A) is a small region of the brain involved in regulating the circadian rhythm, which controls the sleep-wake cycle. The hippocampus (B) is primarily involved in memory formation and spatial navigation, while the basal nuclei (C) are clusters of neurons involved in motor control and certain cognitive functions, including decision-making and behavior regulation.
In short, the corpus callosum is vital for efficient brain function as it allows the two hemispheres to communicate and share information, supporting a wide range of mental and physical processes.