external calcarine sulcus

external calcarine sulcus (ecs)

The term external calcarine sulcus refers to a short horizontal groove on the lateral surface of the cerebral cortex near the occipital pole of the occipital lobe. It is found in the human ( Duvernoy-1992 ) and the macaque ( Martin-2000; Paxinos-2009a ). No equivalent structure is found in the rat or the mouse ( NeuroNames ).

Also known as: external calcarine sulcus, Sulcus ectocalcarinus, external calcarine fissure, ectocalcarine sulcus, occipitopolar sulcus

NeuroNames ID: 146

All Names & Sources

1 of 9

Showing 9 synonym(s) - Use arrows to navigate

Showing 9 synonym(s)

Name:

external calcarine sulcus

Language:

English

Organism:

Macaca mulatta

Source:

Bonin-1947

Citation:

University of Illinois Press, Urbana, Illinois, 1947

Source Title:

The Neocortex of Macaca Mulatta

Name:

Sulcus ectocalcarinus

Language:

Latin

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

Name:

external calcarine fissure

Language:

English

Organism:

Macaca mulatta

Source:

Cunningham-1892

Citation:

The Academy House, Dublin, 1892

Source Title:

Contribution to the Surface Anatomy of the Cerebral Hemispheres with a Chapter upon Cranio-Cerebral Topography

Name:

external calcarine fissure

Language:

English

Organism:

chimpanzee

Source:

Cunningham-1892

Citation:

The Academy House, Dublin, 1892

Source Title:

Contribution to the Surface Anatomy of the Cerebral Hemispheres with a Chapter upon Cranio-Cerebral Topography

Name:

ecs

Language:

acronym

Organism:

macaque

Source:

Martin-2000

Citation:

Elsevier, Amsterdam, 2000

Source Title:

Primate Brain Maps: Structure Of The Macaque Brain

Name:

sillon occipitopolaire

Language:

French

Organism:

human

Source:

Duvernoy-1992

Citation:

Springer-Verlag, Paris, 1992

Source Title:

Le cerveau humain: Surface, coupes seriees tridimensionnelles et IRM

Name:

ecal

Language:

acronym

Organism:

Macaca mulatta

Source:

Paxinos-2009a

Citation:

Amsterdam: Elsevier-Academic Press. 2009

Source Title:

The Rhesus Monkey Brain, Second Edition

Name:

ectocalcarine sulcus

Language:

English

Organism:

macaque

Source:

Bonin-1947

Citation:

University of Illinois Press, Urbana, Illinois, 1947

Source Title:

The Neocortex of Macaca Mulatta

Name:

occipitopolar sulcus

Language:

English

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

1 of 5

Showing 5 record(s) - Use arrows to navigate

Showing 5 record(s)

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

occipitopolar sulcus

Source:

Duvernoy-1992

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca mulatta (Macaca mulatta)

Their Name:

external calcarine fissure

Source:

Cunningham-1892

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca mulatta (Macaca mulatta)

Their Name:

external calcarine sulcus

Source:

Bonin-1947

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.

brain

forebrain

endbrain