superior calcarine sulcus

superior calcarine sulcus (clss)

The term superior calcarine sulcus (clss) refers to one of two extensions of the calcarine fissure (clf) where it splits into two short vertically oriented branches near the occipital pole (ocp). This is the dorsally curved superior branch; the other is a symmetrical, ventrally curved inferior calcarine sulcus (clsi). Both are found in the macaque ( Martin-2000; Paxinos-2009a ) and, though not named as separate sulci, illustrated in human brain atlases ( Ono-1990; Duvernoy-1992; Mai-1997 ). No comparable structures are found in the smooth cerebral cortex (CTX) of the rat or mouse ( NeuroNames ). Updated 30 Oct 2024.

Also known as: Ramus ascendens fissurae calcarinae, superior ramus of calcarine fissure, upper calcarine sulcus, superior calcarine sulcus, retrocalcarine sulcus

NeuroNames ID: 147

All Names & Sources

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English

retrocalcarine sulcus

Duvernoy-1992

English

superior calcarine sulcus

Martin-2000

English

superior ramus of calcarine fissure

Bonin-1947

English

upper calcarine sulcus

Krieg-1975

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)

retrocalcarine sulcus

Duvernoy-1992

Topology

Yes

Macaca mulatta (Macaca mulatta)

superior ramus of calcarine fissure

Bonin-1947

Topology

Yes

Macaca mulatta (Macaca mulatta)

upper calcarine 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)