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watershed zone

a zone that lies between the vascular distribution areas (vascular beds) of two arteries. Although the cerebral cortex is well supplied by arteries with collateral branches, there are areas at the junction of the parietal and occipital lobes and between the parietal and temporal lobes that are watershed zones. Such areas are particularly sensitive to anoxic injury (see watershed infarction).

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Psychology term of the day

May 9th 2024

postural aftereffect

postural aftereffect

a change in posture that arises as an aftereffect of prior stimulation. For example, when viewing a moving scene, a person typically leans in the direction of the motion. When viewing ends, body posture returns to a vertical position and then, briefly, leans in the opposite direction.