Human Brain: Left-Right Asymmetries in Temporal Speech Region

See allHide authors and affiliations

Science  12 Jul 1968:
Vol. 161, Issue 3837, pp. 186-187
DOI: 10.1126/science.161.3837.186


We have found marked anatomical asymmetries between tile upper surfaces of the human right and left temporal lobes. The planum temporale (the area behind Hesch's gyrus) is larger on the left in 65 percent of brains; on the right it is larger in only 11 percent. The left planum is on the average one-third longer than the planum. This area makes up part of the temporal speech cortex, whose importance is well established on the basis of both anatomical findings in aphasic patients ans cortical stimulation at operation.

Stay Connected to Science