Variability in hand surface representations in areas 3b and 1 in adult owl and squirrel monkeys

  title={Variability in hand surface representations in areas 3b and 1 in adult owl and squirrel monkeys},
  author={Michael Merzenich and Randall Nelson and Jon H. Kaas and Michael P. Stryker and William M. Jenkins and John M. Zook and Max S. Cynader and Axel Schoppmann},
  journal={Journal of Comparative Neurology},
Detailed microelectrode maps of the hand representation were derived in cortical areas 3b and 1 from a series of normal adult owl and squirrel monkeys. While overlap relationships were maintained, and all maps were internally topographic, many map features varied significantly when examined in detail. Variable features of the hand representations among different monkeys included (a) the overall shapes and sizes of hand surface representations; (b) the actual and proportional areas of… 

Topographic reorganization of the hand representation in cortical area 3b owl monkeys trained in a frequency-discrimination task.

Adult owl monkeys were trained to detect differences in the frequency of a tactile flutter-vibration stimulus above a 20-Hz standard and the cortical representations of the trained hands were substantially more complex in topographic detail than the representations of unstimulated hands or of passively stimulated control hands.

Receptive fields in the body-surface map in adult cortex defined by temporally correlated inputs

The hypothesis that the topography of the body-surface map in the adult cortex is influenced by the temporal correlations of afferent inputs is supported by altering the correlation of inputs from two adjacent digits on the adult owl monkey hand by surgically connecting the skin surfaces of the two fingers.

Functional reorganization of primary somatosensory cortex in adult owl monkeys after behaviorally controlled tactile stimulation.

These experiments demonstrate that functional cortical remodeling of the S1 koniocortical field, area 3b, results from behavioral manipulations in normal adult owl monkeys.

Variability in tactile projection patterns to cerebellar folia crus IIa of the norway rat

A new role is proposed and discussed for these cerebellar regions in coordinating the acquisition of tactile sensory information by making inter‐animal comparisons of the detailed distribution of receptive fields in the granule cell layer of the crown of crus IIa by using physiological mapping techniques.

A Histologically Visible Representation of the Fingers and Palm in Primate Area 3 b and its Immutability Following Long-term

It is concluded that the anatomical isomorph for the body surface representation in area 3b is a reliable reflection of normal cortical organization and may be a common feature of the primate area 2b, and can provide a reference in studies of somatotopic reorganization.

Anatomical and functional organization of somatosensory areas of the lateral fissure of the New World titi monkey (Callicebus moloch)

The present study demonstrates features of somatosensory cortex of other monkeys in titi monkeys, while revealing additional features that likely apply to other primates.

Functional plasticity of cortical representations of the hand

How representations of the hand are remodeled in detail in a monkey performing a simple small-object retrieval task that stereotypically engages specific skin surfaces and involves specific hand movements is described.

Digit somatotopy within cortical areas of the postcentral gyrus in humans.

The present study characterizes the detailed somatotopic representation of individual digits within subregions of the postcentral gyrus in humans using high-spatial resolution functional magnetic resonance imaging and surface-based mapping and identified the specific digit pairs that are separable in areas 3b and 1 using current imaging methods.

Area 3a: topographic organization and cortical connections in marmoset monkeys.

The functional organization and connections of area 3a, a cortical field proposed to be involved in somato-motor-vestibular integration, have never been described for any primate and suggest that 3a may be an important component in a network that generates a common frame of reference for hand and eye coordinated reaching tasks.

Environmental enrichment alters organizational features of the forepaw representation in the primary somatosensory cortex of adult rats

The view that cortical cutaneous maps are maintained in a permanent state of use-dependent fluctuation is corroborates the view that environmental enrichment induced alterations in the representational features of the SI cutaneous map of the forepaw.



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.

Magnification, receptive-field area, and "hypercolumn" size in areas 3b and 1 of somatosensory cortex in owl monkeys.

The area of cortex presumed to receive all fibers from any given receptive field was obtained and found to be independent of the body surface represented and may be akin to the “hypercolumn” proposed for primary visual cortex.

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,

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

The somatotopic organization of the postcentral parietal cortex of the Old World monkey, Macaca fascicularis, was determined with multi‐unit microelectrode recordings and it is suggested that the representation in Area 3b is homologous to “SmI” (or “SI”) in non‐primates.

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.

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.

Retinotopic organization of areas 18 and 19 in the cat

The location and retinotopic organization of areas 18 and 19 in cat cortex were determined using electrophysiological mapping techniques and an unusual asymmetry was found between the representations of the upper and lower visual quadrants not seen before in maps of other areas of cat or other species.