The tract of nerve fibres connecting the two cerebral hemispheres is called

Options

A. Thalamus
B. Cerebral aqueduct
C. Corpus albicans
D. Corpus callosum

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the tract of nerve fibers that connects the two cerebral hemispheres of the brain.

2. **Identifying the Cerebral Hemispheres**: The human brain is divided into two halves, known as the right and left cerebral hemispheres. Each hemisphere is responsible for different functions and processes.

3. **Recognizing the Connection**: The connection between the two hemispheres is crucial for communication and coordination of activities between them.

4. **Identifying the Correct Term**: The structure that connects the two cerebral hemispheres is known as the "corpus callosum." This is a bundle of nerve fibers that facilitates communication between the left and right sides of the brain.

5. **Understanding the Role of Corpus Callosum**: The corpus callosum is the largest commissural fiber in the brain, consisting of approximately 250 to 300 million axons. It plays a vital role in integrating sensory, motor, and cognitive functions across the hemispheres.

6. **Eliminating Incorrect Options**: The other options provided (thalamus, cerebral adequate, corpus albicans) do not serve the function of connecting the cerebral hemispheres. The thalamus is a relay station for sensory information, while the other two terms do not refer to major structures involved in inter-hemispheric communication.

7. **Final Answer**: Therefore, the tract of nerve fibers connecting the two cerebral hemispheres is called the **corpus callosum**.

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