motor cortex

The term motor cortex refers to anterodorsal areas of the cerebral cortex that are defined on the basis of internal structure, connectivity and function. The defining structural feature in all species is the absence of granular cell layers; thus, it is also known as agranular cortex ( Wise-1985a, Matelli-2004 ). In the human and the macaque the motor cortex is located in the frontal lobe, primarily in the precentral gyrus and in caudal portions of the superior frontal gyrus and middle frontal gyrus. In The rat ( Swanson-2004 ) and the mouse ( Hof-2000 ) it is located dorsolaterally in the anterior half of the cerebral cortex; at the frontal pole it occupies the entire dorsal and lateral aspects of the cortex; from there it gradually narrows to the caudal extreme, where it occupies a narrow band on the dorsal surface along the midline. The motor cortex is composed of two parts: primary motor cortex and premotor cortex. For subcortical structures involved in the control of behavior see brainstem motor system.

Also known as: motor cortex, motor area, somatomotor areas, somatic motor areas

NeuroNames ID: 2332

All Names & Sources

Showing 11 synonym(s)

Name:

corteza motora

Language:

Spanish

Organism:

human

Citation:

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

Source Title:

Neuroanatomía Fundamentos

Name:

motorischer Kortex

Language:

German

Organism:

human

Citation:

Eighth Edition, Springer Verlag, Berlin, 1999.

Source Title:

Anatomie

Name:

motor cortex

Language:

English

Organism:

human

Source:

Zilles-1990

Citation:

Chapter 22, pp. 757-802 in The Human Nervous System, G. Paxinos (Ed.), Academic Press, San Diego, 1990

Source Title:

Cortex

Name:

motor area

Language:

English

Organism:

macaque

Source:

Wise-1985a

Citation:

Annu Rev Neurosci 1985;8:1-19

Source Title:

The primate premotor cortex: past, present, and preparatory

Name:

motor area

Language:

English

Organism:

human

Source:

Zilles-1990

Citation:

Chapter 22, pp. 757-802 in The Human Nervous System, G. Paxinos (Ed.), Academic Press, San Diego, 1990

Source Title:

Cortex

Name:

corteccia motoria

Language:

Italian

Organism:

human

Citation:

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

Source Title:

Fondamenti di Neuroanatomia

Name:

korteks motorik

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:

somatomotor areas

Language:

English

Organism:

rat

Source:

Swanson-2004

Citation:

Third Edition, Elsevier Academic Press, Oxford, 2004

Source Title:

Brain Maps: Structure of the Rat Brain.

Name:

somatic motor areas

Language:

English

Organism:

rat

Source:

BAMS

Citation:

Bota M, Dong HW and Swanson L (2003) From gene networks to brain networks, Nature Neuroscience. 6:795-799.

Source Title:

Brain Architecture Management System

Name:

MO

Language:

acronym

Organism:

rat

Source:

Swanson-2004

Citation:

Third Edition, Elsevier Academic Press, Oxford, 2004

Source Title:

Brain Maps: Structure of the Rat Brain.

Name:

MO

Language:

acronym

Organism:

mouse

Source:

Hof-2000

Citation:

Elsevier, Amsterdam, 2000

Source Title:

Comparative Cytoarchitectonic Atlas of the C57BL/6 and 129/Sv Mouse Brains

Species With The Structure
Equivalent By Human Macaque Rat Mouse
Multiple Criteria Has The Structure Relevant Data Not Located Has The Structure Has The Structure

Showing 5 record(s)

Basis:

Multiple Criteria

Has Equivalent:

Yes

Their Name:

motor area

Source:

Zilles-1990

Basis:

Multiple Criteria

Has Equivalent:

Yes

Their Name:

motor cortex

Source:

Zilles-1990

Basis:

Multiple Criteria

Has Equivalent:

Yes

Organism:

Rattus (rat)

Their Name:

somatic motor areas

Source:

BAMS

Basis:

Multiple Criteria

Has Equivalent:

Yes

Organism:

Rattus (rat)

Their Name:

somatomotor areas

Source:

Swanson-2004

Basis:

Multiple Criteria

Has Equivalent:

Yes

Organism:

Mus (mouse)

Their Name:

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Models Where It Appears
Functional CNS Model - Rat

The Functional CNS Model - Rat (FMrat) ( Swanson-2004) is one of three hierarchical models representing the internal organization of the central nervous system (CNS). The others are the Structural CNS Model - Human (SThmn) and the Functional CNS Model - Human (FMhmn). The FMrat model represents the basic organization of the mouse ( Hof-2000 AMBA-2024 ) and, presumably, other rodents. Functional CNS models differ from structural models in that structures are defined and named by connectivity rather than by proximity to other structures at the same level. Functional models are more useful for representing longitudinal components of are grouped based on information drawn from multiple neuroscientific disciplines. such as connections, neurochemical characteristics, and role in physiogical and behavioral processes. While the Functional Model was developed primarily for an atlas of the rat brain ( Swanson-2004 ), the hierarchical organization of structures is for the most part applicable to the human, macaque, mouse and other mammalian brains as well. Structures at lower levels of the Functional CNS hierarchy are largely the same as in the Classical and Developmental Models, i.e., they were originally identified by stains for gray matter (Nissl substance) and white matter (myelin). At the next higher level they are grouped into basic connectional and functional systems of the CNS, such as the subcortical sensory systems, the brainstem motor system and the behavioral state system. At the highest levels CNS structures are grouped on the basis of dissection and embryologic precursors into cerebrum ( cerebral cortex and cerebral nuclei ), cerebellum, and cerebrospinal trunk.

Topographic Model of Human Cerebral Cortex

The topographic model of human cerebral cortex is a closed partitive hierarchical model of cerebral cortical structure in the human. The cerebral cortex is segmented on the basis of internal structure, connectivity, and/or functions of cortical areas. It is designed to update the comprehensive early twentieth century parcellations of Brodmann and of von Economo and Koskinas and their successors. A work in progress, it integrates the most authoritative, comprehensive, and recent parcellations and nomenclatures from peer-reviewed publications and neuroanatomical texts. For an equivalent model in the rodent, Search BrainInfo for ' Functional CNS Model - Rat '. This segmentation of the human cerebral cortex, based on a combination of internal structure, connectivity, and function, complements the classical segmentation of the cerebral cortex into lobes, lobules, and gyri based on sulcal patterns: For the classical segmentation, see ' cerebral cortex ' and click 'Locus in Brain Hierarchy'.