medial parieto-occipital sulcus

medial parieto-occipital sulcus (apos)

The term medial parieto-occipital sulcus refers to a small three-limbed groove located on the medial surface of the cerebral hemisphere of the macaque ( Martin-2000 ). Defined by dissection, it marks the four-way junction of the occipital lobe and parietal lobe with the posterior cingulate gyrus and isthmus of the cingulate gyrus ( limbic lobe ). It is equivalent to the lower part of the splenial sulcus of the human ( Ono-1990 ). In the macaque the upper part, the subparietal sulcus, is detached ( Bonin-1947 ). Equivalent structures are not found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).

Also known as: Sulcus parieto-occipitalis anterior, medial parieto-occipital fissure, anterior parieto-occipital sulcus, medial parieto-occipital sulcus, accessory parieto-occipital sulcus

NeuroNames ID: 53

All Names & Sources

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English

accessory parieto-occipital sulcus

Paxinos-2009a

English

anterior parieto-occipital sulcus

Martin-2000

English

medial parieto-occipital fissure

Bonin-1947

English

medial parieto-occipital sulcus

NeuroNames

Illustrations

Showing 3 illustration(s)

labeled line drawings of
sagittal section in
Macaca fascicularis

surface view of
lateral aspect in
macaque

drawing of
all aspects in
macaque

Species With The Structure

Equivalent By	Human	Macaque	Rat	Mouse
Topology	Has The Structure	Has The Structure	Does Not Have The Structure	Does Not Have The Structure

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Basis

Has Equivalent

Organism

Their Name

Source

Topology

Yes

Homo sapiens (human)

subparietal sulcus

NeuroNames

Topology

Yes

Macaca fascicularis (Macaca fascicularis)

Sulcus parieto-occipitalis anterior

NeuroNames

Topology

Yes

Macaca mulatta (Macaca mulatta)

medial parieto-occipital fissure

Topology

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Topology

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Models Where It Appears

Structural CNS Model - Macaque

Brain structures of the macaque are illustrated in BrainInfo’s NeuroMaps macaque brain atlas. Structures are grouped by proximity in a hierarchy corresponding to the central nervous system hierarchy of NeuroNames ( Bowden-1995 Martin-2000 ). Structures in the NeuroMaps atlas are based on the segmentation of an MRI of the brain of a 3-year old male rhesus macaque (Macaca mulatta). The atlas is most useful for targeting structures for implantating electrodes and chemtrodes. Updated 29 Oct 2025.