central sulcus

a major cleft (see sulcus) that passes roughly vertically along the lateral surface of each cerebral hemisphere from a point beginning near the top of the cerebrum. It marks the border between the frontal lobe and the parietal lobe. Also called central fissure; fissure of Rolando; Rolandic fissure; Rolandic sulcus; sulcus centralis.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

December 18th 2024

acuity grating

a stimulus used to measure an individual’s sharpness of visual perception. It consists of alternating black and white lines spaced closely together; the point at which the participant perceives the lines to be homogeneous gives an indication of visual acuity. When the contrast of the lines is varied, the acuity grating can be used to test contrast sensitivity.