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parahippocampal gyrus

a ridge (gyrus) on the medial (inner) surface of the temporal lobe of cerebral cortex, lying over the hippocampus. It is a component of the limbic system thought to be involved in spatial or topographic memory. A region of it, the parahippocampal place area (PPA), has been shown to have significant activity in response to complex visual scenes (e.g., city streets, rooms, landscapes) and may aid in place recognition. Also called parahippocampal cortex.

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Psychology term of the day

November 16th 2024

tropism

tropism

n. a form of orientation observed in both plants and nonhuman animals toward or away from a stimulus, such as sunlight or gravity. The flower of a plant may turn gradually to face the sun as it moves across the sky (heliotropism), while its roots follow magnetic lines of force and the pull of gravity. Tropism contrasts with taxis, which is a directed movement toward or away from a stimulus. Compare kinesis. —tropic adj.