intraparietal sulcus

intraparietal sulcus (ips)

The term intraparietal sulcus (itps) refers to a very deep cleft that separates the superior parietal lobule (SPL) from the inferior parietal lobule (IPL) of the primate. Identified by dissection, in the human it separates the SPL from part of the supramarginal gyrus (SMG) of the IPL and from all of the angular gyrus (ANG) of that lobule ( Duvernoy-1992 ). In the macaque it separates only the SMG from the SPL ( Martin-2000 ). In both species the itps extends deep into the folds of cerebral cortex (CTX), splitting at some levels to form one or two small convolutions that are not visible from outside the brain. In the human, small unnamed convolutions arise variably from the SPL, the ANG, or the middle occipital gyrus to form gyri in the lateral wall or floor of the sulcus ( Duvernoy-1992; Mai-1997 ). This complex intracortical pattern can extend from the origin of the sulcus at the boundary of the superior parietal lobule (SPL) with the postcentral gyrus (POG) almost to the occipital pole (ocp) ( Duvernoy-1992 ). In the macaque, the hidden portion of the sulcus has been called the 'simian fossa'. It contains a single buried convolution, the annectant gyrus (ANN), which arises from the SMG laterally and, medially, is continuous with the wall of the SPL. Proceeding caudally, the sulcus ends in junction with the lunate sulcus (lusm) of the human at the rostrodorsal border of the occipital lobe OLB). There a part of the annectant gyrus may split off to form the floor of the lunate sulcus of the human, while the main part, surrounded on three sides by the intraparietal sulcus, dives beneath the fused cortex of the occipital gyrus dorsolaterally and cuneus dorsally and medially. Further caudally, the sulcus may open onto the longitudinal fissure (lf), exposing a bit of the annectant gyrus through the cuneus on the medial surface of the occipital lobe. The annectant gyrus and an equal segment of occipital gyrus fuse their ends around a horizontal oval of intraparietal sulcus and detach from the overlying cortex to form a flattened tube that continues a few millimeters caudally in occipital white matter ( Martin-2000; Dubach-2008 ). In the rhesus macaque ( Macaca mulatta ), the portion of the ANN that joins the lunate sulcus of the human follows a similar course ( Paxinos-2009a; Dubach-2008 ). Equivalent structures are not found in the rat or mouse ( NeuroNames ). Updated 28 May 2025.

Also known as: Sulcus interparietalis, intraparietal sulcus, Sulcus intraparietalis, intraparietal fissure, interparietal fissure, sulcus interparietalis, simian fossa, Fossa simiarum

NeuroNames ID: 97

All Names & Sources

1 of 21

Showing 21 synonym(s) - Use arrows to navigate

Showing 21 synonym(s)

Name:

ips

Language:

acronym

Organism:

human

Source:

Mai-1997

Citation:

San Diego: Academic Press, 1997

Source Title:

Atlas of the Human Brain

Name:

cisura intraparietal

Language:

Spanish

Organism:

human

Source:

Carpenter-1994

Citation:

edicion 4, Williams & Wilkins, Baltimore; traducción de Editorial Medica Panamericana, Buenos Aires, efectuada por el Dr. Alejandro Kaufman

Source Title:

Neuroanatomía Fundamentos

Name:

Sulcus interparietalis

Language:

Latin

Organism:

Macaca mulatta

Source:

Sugar-1950

Citation:

Source Title:

Corticocortical connections of the cortex buried in the intraparietal and principal sulci of the monkey (Macaca mulatta)

Name:

внутритеменная борозда

Language:

Russian

Organism:

human

Source:

Savel'ev-1996

Citation:

AREA XVII, Moscow, 1996.

Source Title:

Stereoskopicheskii Atlas Mozga Cheloveka

Name:

itps

Language:

acronym

Organism:

macaque

Source:

Martin-2000

Citation:

Elsevier, Amsterdam, 2000

Source Title:

Primate Brain Maps: Structure Of The Macaque Brain

Name:

solco intraparietale

Language:

Italian

Organism:

human

Source:

Carpenter-1995

Citation:

EdiSes, s.r.l.- Napoli, 1995

Source Title:

Fondamenti di Neuroanatomia

Name:

sulkus intraparietal

Language:

Indonesian

Organism:

human

Source:

Noback-1982

Citation:

Jakarta: Penerbit Buku Kedokteran EGC, 1982

Source Title:

Anatomi Susunan Saraf Manusia, Prinsip-Prinsip Dasar Neurobiologi

Name:

intraparietal sulcus

Language:

English

Organism:

human

Source:

Carpenter-1983

Citation:

Baltimore: Williams and Wilkins Co., 1983

Source Title:

Human Neuroanatomy

Name:

intraparietal sulcus

Language:

English

Organism:

Macaca fascicularis

Source:

Szabo-1984

Citation:

J Comp Neurol 1984 Jan 10;222(2):265-300

Source Title:

A stereotaxic atlas of the brain of the cynomolgus monkey (Macaca fascicularis)

Name:

Sulcus intraparietalis

Language:

Latin

Organism:

human

Source:

Nomina-1983

Citation:

Fifth Edition, Williams and Wilkins Co., Baltimore, 1983

Source Title:

Nomina Anatomica

Name:

intraparietal fissure

Language:

English

Organism:

human

Source:

Crosby-1962

Citation:

New York: MacMillan, 1962

Source Title:

Correlative Anatomy of the Nervous System

Name:

interparietal fissure

Language:

English

Organism:

human

Source:

Crosby-1962

Citation:

New York: MacMillan, 1962

Source Title:

Correlative Anatomy of the Nervous System

Name:

sulcus interparietalis

Language:

Latin

Organism:

human

Source:

Savel'ev-1996

Citation:

AREA XVII, Moscow, 1996.

Source Title:

Stereoskopicheskii Atlas Mozga Cheloveka

Name:

sulcus intrapariétal

Language:

French

Organism:

human

Source:

Duvernoy-1992

Citation:

Springer-Verlag, Paris, 1992

Source Title:

Le cerveau humain: Surface, coupes seriees tridimensionnelles et IRM

Name:

sillion interpariétal

Language:

French

Organism:

Papio

Source:

Riche-1968

Citation:

Editions du Centre National de la Recherche Scientifique, Paris, 1968

Source Title:

Atlas Stéréotaxique du Cerveau de Babouin (Papio papio)

Name:

ips

Language:

acronym

Organism:

Macaca mulatta

Source:

Paxinos-2009a

Citation:

Amsterdam: Elsevier-Academic Press. 2009

Source Title:

The Rhesus Monkey Brain, Second Edition

Name:

simian fossa

Language:

English

Organism:

macaque

Source:

Kappers-1960

Citation:

Hafner Pub. Co., New York, 1960

Source Title:

The Comparative Anatomy of the Nervous System of Vertebrates, Including Man

Name:

Language:

acronym

Organism:

macaque

Source:

Martin-2000

Citation:

Elsevier, Amsterdam, 2000

Source Title:

Primate Brain Maps: Structure Of The Macaque Brain

Name:

Affenspaltgrube

Language:

German

Organism:

macaque

Source:

Kappers-1960

Citation:

Hafner Pub. Co., New York, 1960

Source Title:

The Comparative Anatomy of the Nervous System of Vertebrates, Including Man

Name:

Fossa simiarum

Language:

Latin

Organism:

macaque

Source:

Kappers-1960

Citation:

Hafner Pub. Co., New York, 1960

Source Title:

The Comparative Anatomy of the Nervous System of Vertebrates, Including Man

Name:

itps

Language:

acronym

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

Illustrations

Showing 3 illustration(s)

surface view of
fetal brain in
human

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 9

Showing 9 record(s) - Use arrows to navigate

Showing 9 record(s)

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

interparietal fissure

Source:

Crosby-1962

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

intraparietal fissure

Source:

Crosby-1962

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

intraparietal sulcus

Source:

Carpenter-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

sulcus interparietalis

Source:

Savel'ev-1996

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Sulcus intraparietalis

Source:

Nomina-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca fascicularis (Macaca fascicularis)

Their Name:

intraparietal sulcus

Source:

Szabo-1984

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca mulatta (Macaca mulatta)

Their Name:

Sulcus interparietalis

Source:

Sugar-1950

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

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