Broca, Pierre-Paul
Fr. surgeon and anthropologist, 18241880.
B. area The area of the left hemisphere of the brain at the posterior end of the inferior frontal gyrus. It contains the motor speech area and controls movements of tongue, lips, and vocal cords. Loss of speech may follow any stroke affecting this area. SYN: Broca center; Broca convolution; motor speech area; speech center.
SEE: motor aphasia.
B. fissure The fissure encircling the third left frontal convolution of the brain.
B. gyrus The posterior two thirds of the inferior frontal gyrus, a gyrus of the frontal lobe just above the beginning of the fissure of Sylvius.