What structure divides the brain into two hemispheres?

What structure divides the brain into two hemispheres?

• A. Longitudinal Fissure
• B. Central Sulcus
• C. Corpus Callosum
• D. Optic Chiasm

Answer: (A)

The structure that divides the brain into two hemispheres is a deep groove that runs along the midline from front to back, called the longitudinal fissure. It literally splits the cerebrum into left and right halves, creating the two hemispheres. The central sulcus sits within each hemisphere and separates the frontal and parietal lobes, but it doesn’t divide the brain into hemispheres. The corpus callosum is the major bundle of fibers that connects the two hemispheres, enabling communication between them, not splitting them. The optic chiasm is where the visual nerves cross beneath the brain, unrelated to dividing the brain into hemispheres.

The structure that divides the brain into two hemispheres is a deep groove that runs along the midline from front to back, called the longitudinal fissure. It literally splits the cerebrum into left and right halves, creating the two hemispheres. The central sulcus sits within each hemisphere and separates the frontal and parietal lobes, but it doesn’t divide the brain into hemispheres. The corpus callosum is the major bundle of fibers that connects the two hemispheres, enabling communication between them, not splitting them. The optic chiasm is where the visual nerves cross beneath the brain, unrelated to dividing the brain into hemispheres.