This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy 1, Subject name: Anatomy
From which one of the following structures does Heschl's gyrus receive input? 
Select and explain. 
A. Angular gyrus, B. Medial geniculate nucleus, C. Primary auditory coex, D. Pulvinar
B: Medial geniculate nucleus
Answer: B: Medial geniculate nucleus 
Explanation: Primary auditory coex (areas 41 and 42) is found in the transverse gyrus of Heschl and receives input from the medial geniculate nucleus. Parietal lobe includes the angular gyrus -receives visual impulses (area 39) and supramarginal gyrus -interrelates somatosensory, auditory, and visual inputs (area 40). Destruction of the angular and supramarginal gyri on the dominant (usually left) side gives rise to Gerstmann syndrome - symptoms include agraphia, acalculia, finger agnosia and left-right disorientation.