Which fibers connect similar areas of the right and left hemispheres, enabling the two sides to work in tandem?

• A. Commissural Fibers
• B. Association Fibers
• C. Projection Fibers
• D. Short Fibers

Answer: (A)

Connecting corresponding areas of the two hemispheres relies on commissural fibers. These cross from one side to the other, linking similar cortical regions so the left and right hemispheres can share information and work in unison. The corpus callosum is the main example of these tracts, acting as a major highway for interhemispheric communication that coordinates processes like movement, sensation, and higher cognitive functions. In contrast, association fibers stay within a single hemisphere to connect different regions, projection fibers run between the cortex and distant brain structures, and short (U-fiber) connections link nearby gyri within the same hemisphere.