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Temporal lobe destruction in a patient with pure word deafness and tabes dorsalis (3)

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Coronal section of the brain, passing through the extreme posterior end of the transverse convolutions and insula, and through the geniculate bodies. (Left side) On the left side, the cortex of the ventral surface of the superior temporal gyrus is defective. The cortex of the upper surface of the middle temporal gyrus and most of the fibers of the center of the convolution are absent. The deep fiber areas of the lobe show beneath the bottom of T, a great diminution in numbers, and the degeneration continues inward as a thin streak traceable as far as the lenticular nucleus. This streak occupies the position of the fiber radiations between the medial geniculate body and the first temporal convolution. (Right side) The condition on the right side is much the same. The medial geniculate bodies on both sides give no evidence of degeneration changes; their cells are of normal appearance, and their fibers are abundant and deeply stained. (From: Barrett A. A case of pure word-deafness with autopsy. J Nerv Ment Dis 1910;37[2]:84.)