inferior occipital sulcus

inferior occipital sulcus (iocs)

The term inferior occipital sulcus refers to a horizontal groove low on the lateral aspect of the occipital lobe of human cerebral cortex. It separates the middle occipital gyrus above from the inferior occipital gyrus below ( Duvernoy-1992 ). In the macaque it extends from the ventrolateral surface of the occipital lobe to the ventral surface and separates the occipital gyrus from the inferior occipital gyrus. Equivalent structures are not found in the smooth cerebral cortex of the rat and mouse ( NeuroNames ).

Also known as: inferior occipital sulcus, Sulcus occipitalis inferior, occipitoinferior sulcus

NeuroNames ID: 144

All Names & Sources

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English

inferior occipital sulcus

Szabo-1984

English

occipitoinferior sulcus

Seltzer-1978

Illustrations

Showing 2 illustration(s)

labeled line drawings of
sagittal section in
Macaca fascicularis

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)

inferior occipital sulcus

NeuroNames

Topology

Yes

Macaca fascicularis (Macaca fascicularis)

inferior occipital sulcus

Szabo-1984

Topology

Yes

Macaca mulatta (Macaca mulatta)

occipitoinferior sulcus

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.

brain

forebrain

cerebrum (endbrain)