What is the name of the large bundle of nerve fibers that connects the left and right cerebral hemispheres?

The large bundle of nerve fibers that connects the left and right cerebral hemispheres is known as the corpus callosum. This structure plays a crucial role in facilitating communication between the two hemispheres, allowing for the integration of sensory information and enabling coordinated responses. The corpus callosum is essential for many cognitive processes, including problem-solving and language, as it helps synchronize the brain's functions, allowing the two halves to work together effectively.

In contrast, the cerebral cortex is the outer layer of the brain involved in many complex brain functions such as perception, thought, and decision-making. The cerebellum is primarily responsible for motor control and coordination, while the thalamus acts as a relay station for sensory and motor signals to the cerebral cortex. Thus, while each of these structures has important functions in the brain, it is the corpus callosum that specifically connects the two hemispheres.