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The parahippocampal gyrus (or hippocampal gyrus [1]) is a grey matter cortical region of the brain that surrounds the hippocampus and is part of the limbic system. The region plays an important role in memory encoding and retrieval. It has been involved in some cases of hippocampal sclerosis. [2] Asymmetry has been observed in schizophrenia. [3]
The uncus is an anterior extremity of the parahippocampal gyrus.It is separated from the apex of the temporal lobe by a sulcus called the rhinal sulcus. [1] Although superficially continuous with the hippocampal gyrus, the uncus forms morphologically a part of the rhinencephalon.
Anatomical terms of neuroanatomy [edit on Wikidata] Brodmann area 27 is a cytoarchitecturally defined cortical area that is a rostral part of the parahippocampal gyrus.
Anatomical terms of neuroanatomy [ edit on Wikidata ] In the human brain , the entorhinal cortex appears as a longitudinal elevation anterior to the parahippocampal gyrus , with a corresponding internal furrow, the external rhinal sulcus (or rhinal fissure ).
The perirhinal cortex is involved in both visual perception and memory; [1] it facilitates the recognition and identification of environmental stimuli. Lesions to the perirhinal cortex in both monkeys and rats lead to the impairment of visual recognition memory, disrupting stimulus-stimulus associations and object-recognition abilities.
Anatomical terms of neuroanatomy [ edit on Wikidata ] The cingulate gyrus commences below the rostrum of the corpus callosum , curves around in front of the genu , extends along the upper surface of the body, and finally turns downward behind the splenium , where it is connected by a narrow isthmus with the parahippocampal gyrus .