Representations of the body surface in postcentral parietal cortex of Macaca fascicularis

  title={Representations of the body surface in postcentral parietal cortex of Macaca fascicularis},
  author={Randall Nelson and Mriganka Sur and D. J. Felleman and Jon H. Kaas},
  journal={Journal of Comparative Neurology},
The somatotopic organization of the postcentral parietal cortex of the Old World monkey, Macaca fascicularis, was determined with multi‐unit microelectrode recordings. The results lead to the following conclusions: (1) There are at least two complete and systematic representations of the contralateral body surface in the cortex of the postcentral gyrus. One representation is contained within Area 3b, the other within Area 1. (2) While there are important differences in the organization of the… 

Representations of the body surface in cortical areas 3b and 1 of squirrel monkeys: Comparisons with other primates

Remarkably, the representations of some body parts were reversed in orientation in both area 3b and area 1 in squirrel monkeys as compared to owl and macaque monkeys, suggesting that both fields are divided into sectors where the basic somatotopic orientation is independently determined, that the orientation of some of these sectors is subject to reversal in evolution, and that matching sectors in areas3b and 1 are not independent in somattopic organization.

A redefinition of somatosensory areas in the lateral sulcus of macaque monkeys

The results provide evidence for two complete representations of the body surface in the region of cortex traditionally designated as SII in macaque monkeys, and it is proposed that SII and PV are components of a common plan of organization, and are present in many eutherian mammals.

Cellular Organization in the Primate Postcentral Gyrus

The first somatic sensory area (SI) of higher primates occupies the postcentral gyrus and is a composite of four distinct architectonic areas (areas 3a, 3b, 1 and 2). Each of these probably contains

Somatotopic organization of cortical fields in the lateral sulcus of Homo sapiens: Evidence for SII and PV

Repeated within‐subject stimulus presentation indicated that differences across subjects were not due to inconsistent stimulus presentation, and it is hypothesized that these features may be associated with manual dexterity and coordination of the hands, a characteristic generally restricted to the primate lineage.

Body surface maps in the somatosensory cortex of rabbit

  • H. Gould
  • Biology
    The Journal of comparative neurology
  • 1986
The organization of somatosensory maps was examined in rabbits with the aid of microelectrode multi‐unit recording techniques and it is suggested that S I is contained within a single major koniocortical region, here called the medial parietal area, or Pm.

The Postcentral Somatosensory Cortex

These studies led to several important conclusions: the region of postcentral cortex activated by tactile somatic stimuli includes the separate architectonic fields 3 (3a and 3b), 1 and 2 of Brodmann; the cortex is activated almost exclusively from the contralateral half of the body.

The organization and connections of somatosensory cortex in marmosets

  • LA KrubitzerJ. Kaas
  • Biology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1990
Microelectrode mapping methods were used to define and describe 3 representations of the body surface in somatosensory cortex of marmosets: S-I proper or area 3b of anterior parietal cortex, S-II,

Connections of area 2 of somatosensory cortex with the anterior pulvinar and subdivisions of the ventroposterior complex in macaque monkeys

The principal goal of the present study was to determine the thalamic connections of area 2 of postcentral somatosensory cortex of monkeys, and the placement of injections of anatomical tracers was guided by extensive microelectrode maps of cortex in the region of the injection site.

Studies on the evolution of multiple somatosensory representations in primates: The organization of anterior parietal cortex in the new world callitrichid, Saguinus

The organization of somatosensory cortex in the tamarin (Saguinus) is studied in hopes of better understanding differences in the organization of anterior parietal cortex in primates and how these differences relate to phylogeny.



Double representation of the body surface within cytoarchitectonic area 3b and 1 in “SI” in the owl monkey (aotus trivirgatus)

Microelectrode multiunit mapping studies of parietal cortex in owl monkeys indicate that the classical “primary” somatosensory region (or “SI”) including the separate architectonic fields 3a, 3b, 1,

Representation of head and face in postcentral gyrus of the macaque.

The receptive field and submodality characteristics of individual neurons within the cytoarchitectural and topographic subdivisions of the head and face areas of the postcentral gyrus (SI) were determined with the technique of extracellular recording and indicate that the functional organization of the SI cortex which receives its principal input from trigeminal mechanoreceptors is comparable to the organization within those SI regions which receive their input from the mechanoresceptors of the limbs, trunk, and tail.

The representation of the body surface in somatosensory area I of the grey squirrel

Microelectrode mapping methods were used to determine the organization of primary somatosensory cortex, SmI, in grey squirrels. A systematic representation of the contralateral body surface was found

Representation of the body surface in somatic koniocortex in the prosimian Galago

It is concluded that somatic koniocortex of galagos and Area 3b of monkeys are homologous, and the term S‐I proper is suggested for the representation in both prosimians and monkeys.

Cortico‐cortical connections of somatic sensory cortex (areas 3, 1 and 2) in the rhesus monkey

The connections of areas 3, 1 and 2 in the postcentral gyrus of the rhesus monkey are investigated using ablation‐degeneration techniques following both full depth lesions and lesions which involved fewer than six cortical layers to reveal each of these areas has a differential connection pattern.

Organization of primary somatosensory cortex in the cat.

Recordings from SI cortex of barbiturte-anesthetized cats suggest that there are modality- and submodality-specific bands in register with the bands of cytoarchitecture that extend across the mediolateral dimension of primary somatosensory cortex.

Intracortical connectivity of architectonic fields in the somatic sensory, motor and parietal cortex of monkeys

Anterograde and retrograde transport methods were used to study the corticocortical connectivity of areas 3a, 3b, 1, 2, 5, 4 and 6 of the monkey cerebral cortex, finding possible multiple representations of the body surface in the component fields of the first somatic sensory area (SI).