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n. loss of vision in one fourth, or one quadrant, of the visual field. Homonymous quadranopia is the loss of vision in both (upper or lower) quadrants of the same half (right or left) of the visual field of each eye (e.g., left upper quadranopia); it is caused by postchiasmatic brain injury (see postchiasmatic visual deficit). Also called quadranopia; quadrantanopsia; quadrantic hemianopia.

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Psychology term of the day

June 17th 2024

motor dominance

motor dominance

the controlling influence of one cerebral hemisphere shown in motor activity, such as writing or throwing a ball.