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Section of the brain showing the upper surface of the temporal lobe, including the transverse temporal gyri of Heschl

Lithograph of a section of the brain showing the upper surface of the temporal lobe, including the transverse temporal gyri. The medial two thirds of the transverse temporal gyri (Heschel’s gyrus; Brodmann’s areas 41 and 42) is approximately the area that functions as the primary auditory cortex. It is located buried within the Sylvian fissure. (From: Gray H. Anatomy of the Human Body. Philadelphia: Lea & Fibinger, 1918. Public domain.)

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