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Pronunciation: un'kus, un'si


  1. Any hook-shaped process or structure.
  2. The anterior, hooked extremity of the parahippocampal gyrus on the basomedial surface of the temporal lobe; the anterior face of the uncus corresponds to the olfactory cortex, its ventral surface to the entorhinal area; deep to the uncus lies the amygdala (amygdaloid body).

Synonym(s): uncinate gyrus, uncus gyri parahippocampalis

[L. a hook, fr. G. onkos]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.