inferior calcarine sulcus

inferior calcarine sulcus (clsi)

The term inferior calcarine sulcus (clsi) 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 ventrally curved inferior branch; the other is a symmetrical, dorsally curved superior calcarine fissure (clss). The branches are found in the macaque ( Martin-2000; Paxinos-2009a ) and, though often not named as separate structures, are 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: inferior calcarine sulcus (macaque), Ramus descendens fissurae calcarinae, inferior ramus of calcarine fissure, lower calcarine sulcus, inferior calcarine sulcus

NeuroNames ID: 148

All Names & Sources

1 of 9

Showing 9 synonym(s) - Use arrows to navigate

Showing 9 synonym(s)

Name:

iccs

Language:

acronym

Organism:

macaque

Source:

Martin-1996

Citation:

Neuroimage 1996 Oct;4(2):119-50

Source Title:

A stereotaxic template atlas of the macaque brain for digital imaging and quantitative neuroanatomy

Name:

inferior calcarine sulcus (macaque)

Language:

English

Organism:

Macaca fascicularis

Source:

Martin-1997

Citation:

Primate Information Center, University of Washington, Seattle, 1997.

Source Title:

Template Atlas of the Primate Brain

Name:

Ramus descendens fissurae calcarinae

Language:

Latin

Organism:

guenon

Source:

Mauss-1908

Citation:

Journal für Psychologie und Neurologie, 13:263-325, 1908

Source Title:

Die faserarchitektonische Gliederung der Grosshirnrinde bei den niederen Affen

Name:

inferior ramus of calcarine fissure

Language:

English

Organism:

Macaca mulatta

Source:

Bonin-1947

Citation:

University of Illinois Press, Urbana, Illinois, 1947

Source Title:

The Neocortex of Macaca Mulatta

Name:

lower calcarine sulcus

Language:

English

Organism:

Macaca mulatta

Source:

Krieg-1975

Citation:

Brain Books, Evanston, Illinois, 1975

Source Title:

Interpretive Atlas Of The Monkey's Brain

Name:

sillon rétrocalcarine inférieur

Language:

French

Organism:

human

Source:

Duvernoy-1992

Citation:

Springer-Verlag, Paris, 1992

Source Title:

Le cerveau humain: Surface, coupes seriees tridimensionnelles et IRM

Name:

ical

Language:

acronym

Organism:

Macaca mulatta

Source:

Paxinos-2009a

Citation:

Amsterdam: Elsevier-Academic Press. 2009

Source Title:

The Rhesus Monkey Brain, Second Edition

Name:

inferior calcarine sulcus

Language:

English

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

Name:

clsi

Language:

acronym

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

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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Showing 6 record(s) - Use arrows to navigate

Showing 6 record(s)

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

retrocalcarine sulcus

Source:

Duvernoy-1992

Source Page:

213

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca fascicularis (Macaca fascicularis)

Their Name:

inferior calcarine sulcus (macaque)

Source:

Martin-1997

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca mulatta (Macaca mulatta)

Their Name:

inferior ramus of calcarine fissure

Source:

Bonin-1947

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca mulatta (Macaca mulatta)

Their Name:

lower calcarine sulcus

Source:

Krieg-1975

Basis:

Topology

Has Equivalent:

Organism:

Rattus (rat)

Their Name:

---

Source:

NeuroNames

Basis:

Topology

Has Equivalent:

Organism:

Mus (mouse)

Their Name:

---

Source:

NeuroNames

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.

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forebrain

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