ventral root

any of the spinal roots that carry motor nerve fibers and arise from the spinal cord on the front surface of each side. Also called anterior root; motor root. Compare dorsal root. See also Bell–Magendie law.

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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.