The relationship of corpus callosum connections to electrical stimulation maps of motor, supplementary motor, and the frontal eye fields in owl monkeys

  title={The relationship of corpus callosum connections to electrical stimulation maps of motor, supplementary motor, and the frontal eye fields in owl monkeys},
  author={Harry J. Gould and Catherine G. Cusick and Tim P. Pons and Jon H. Kaas},
  journal={Journal of Comparative Neurology},
Microstimulation and anatomical techniques were combined to reveal the organization and interhemispheric connections of motor cortex in owl monkeys. Movements of body parts were elicited with low levels of electrical stimulation delivered with microelectrodes over a large region of precentral cortex. Movements were produced from three physiologically defined cortical regions. The largest region, the primary motor field, M‐I, occupied a 4‐6mm strip of cortex immediately rostral to area 3a. M‐I… 

Representations of Fine Digit Movements in Posterior and Anterior Parietal Cortex Revealed Using Long-Train Intracortical Microstimulation in Macaque Monkeys

It is proposed that these multiple and expanded motor representations of the digits co-evolved with the emergence of the opposable thumb and alterations in grip type in some anthropoid lineages.

Functional organization of human supplementary motor cortex studied by electrical stimulation

  • I. FriedA. Katz D. Spencer
  • Biology, Medicine
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1991
Electrical stimulation mapping with currents below the threshold of afterdischarges showed somatotopic organization of supplementary motor cortex with the lower extremities represented posteriorly, head and face most anteriorly, and the upper extremities between these two regions.

Converging evidence from microstimulation, architecture, and connections for multiple motor areas in the frontal and cingulate cortex of prosimian primates

The results indicate that prosimian galagos have a complex of motor areas that closely resembles that in monkeys and suggest that at least 10 motor fields emerged early in primate evolution.

The size of corpus callosum correlates with functional activation of medial motor cortical areas in bimanual and unimanual movements.

The results suggest that corpus callosum modulates the activity of the supplementary motor and cingulate cortical areas depending on temporal complexity of bimanual movements.

Organization of the posterior parietal cortex in galagos: II. Ipsilateral cortical connections of physiologically identified zones within anterior sensorimotor region

Differences in connections of functionally distinct movement zones of the posterior parietal cortex in galagos identified by intracortical microstimulation with long stimulus trains are consistent with functional parcellation of PPC, and they identify parts of cortical networks that mediate different motor behaviors.

9 A map of complex movements in motor cortex of primates

It is suggested that primary motor and lateral premotor cortex might not be arranged in a hierarchy, but instead might operate in parallel, serving different parts of the workspace.

The somatotopic organization of the supplementary motor area: intracortical microstimulation mapping

  • A. MitzS. Wise
  • Biology, Psychology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1987
There is a clear rostrocaudal progression of orofacial, forelimb, and hindlimb movement representations in the SMA, observed by observing stimulation-evoked movements of 2 rhesus monkeys.

Corpus callosum connections of subdivisions of motor and premotor cortex, and frontal eye field in a prosimian primate, Otolemur garnetti

The sparse interhemispheric connections of theForelimb sector of M1 suggests that the control of each forelimb is largely from the contralateral M1 in galagos, as in other primates.

Movement representation in the dorsal and ventral premotor areas of owl monkeys: A microstimulation study

The results suggest that in humans, much of the electrically excitable cortex located on the precentral gyrus, including cortex sometimes considered part of the frontal eye field, is probably homologous to the premotor cortex of nonhuman primates.

Organization of the forelimb area in squirrel monkey motor cortex: representation of digit, wrist, and elbow muscles

The results suggest that small regions of MI influence multiple muscles, and the broad, overlapping nature of the muscle representation supports the concept that a small region of cortex is involved in controlling functional groups of muscles.



The relation of corpus callosum connections to architectonic fields and body surface maps in sensorimotor cortex of new and old world monkeys

Corpus callosum connections of parietal and motor cortex were studied in New World owl monkeys and Old World macaque monkeys after multiple injections of 3H‐proline and horseradish peroxidase, HRP, into one cerebral hemisphere and extensive microelectrode mapping of architectonic Areas 3b, 1, and 2 of the other hemisphere.

Organization of the face representation in macaque motor cortex

The face representation in precentral motor cortex in macaque monkeys was stimulated with microelectrodes with the most commonly evoked muscle response in zygomaticus, which retracts the corners of the mouth in expressions of fear and anger.

Functional organization of cortical motor areas in adult dogs and puppies.

  • T. Górska
  • Biology
    Acta neurobiologiae experimentalis
  • 1974
Adult dogs and puppies ranging in age from 1 day up to 3 months the functional organization of the motor cortex has been investigated with 50 or 60 cycle a-c stimulation under Nembutal anesthesia, suggesting that the process of maturation of cortical motor areas were not yet completed at this age.

The Supplementary Motor Area — Control System for Posture?

The supplementary motor area (SMA) is interconnected with the precentral motor cortex and receives its main afferents from the somatosensory areas I, II and 5; it is therefore most likely concerned

Supplementary motor area in the monkey: activity of neurons during performance of a learned motor task.

The findings suggest that the discharges of a large number of neurons in SMA are changing during particular movements of either arm, and that only a small number of cells receive peripheral afferent sensory input.

Projections of pyramidal tract cells to alpha‐motoneurones innervating hind‐limb muscles in the monkey.

The results give further evidence for overlapping of areas of cortical projections to motoneurones and speak against a mosaic‐like organization of pyramidal tract cells projecting to different motor nuclei.