Disconnection between the limbic system and the frontal lobe most likely affects which brain structure?

• A. Cingulate Gyrus
• B. Corpus Callosum
• C. Arcuate Fasciculus
• D. Angular Gyrus

Answer: (A)

The key idea is how emotion and cognitive control are connected through a limbic structure that links directly with the frontal cortex. The cingulate gyrus sits along the inner margin of the cortex and serves as a major hub that communicates with the prefrontal areas. Its anterior portion, the anterior cingulate, is especially important for integrating emotional information with decision making, motivation, and error monitoring. If the pathways between the limbic system and the frontal lobe are disrupted, this integration breaks down, and the cingulate region would be directly affected because it orchestrates how affect influences executive control. The other structures are not central conduits for limbic–frontal communication: the corpus callosum connects the two hemispheres, the arcuate fasciculus links language areas, and the angular gyrus handles parietal-linguistic and cognitive processes. So the cingulate gyrus is the most likely structure impacted by such a disconnection.