Ipsilateral connections of the ventral premotor cortex in a new world primate

Numa Dancause, Scott Barbay, Shawn B. Frost, Erie J. Plautz, Ann M. Stowe, Kathleen M. Friel, Randolph J. Nudo

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The present study describes the pattern of connections of the ventral premotor cortex (PMv) with various cortical regions of the ipsilateral hemisphere in adult squirrel monkeys. Particularly, we 1) quantified the proportion of inputs and outputs that the PMv distal forelimb representation shares with other areas in the ipsilateral cortex and 2) defined the pattern of PMv connections with respect to the location of the distal forelimb representation in primary motor cortex (M1), primary somatosensory cortex (S1), and supplementary motor area (SMA). Intracortical microstimulation techniques (ICMS) were used in four experimentally naïve monkeys to identify M1, PMv, and SMA forelimb movement representations. Multiunit recording techniques and myelin staining were used to identify the S1 hand representation. Then, biotinylated dextran amine (BDA; 10,000 MW) was injected in the center of the PMv distal forelimb representation. After tangential sectioning, the distribution of BDA-labeled cell bodies and terminal boutons was documented. In M1, labeling followed a rostrolateral pattern, largely leaving the caudomedial M1 unlabeled. Quantification of somata and terminals showed that two areas share major connections with PMv: M1 and frontal areas immediately rostral to PMv, designated as frontal rostral area (FR). Connections with this latter region have not been described previously. Moderate connections were found with PMd, SMA, anterior operculum, and posterior operculum/inferior parietal area. Minor connections were found with diverse areas of the precentral and parietal cortex, including S1. No statistical difference between the proportions of inputs and outputs for any location was observed, supporting the reciprocity of PMv intracortical connections.

Original languageEnglish (US)
Pages (from-to)374-390
Number of pages17
JournalJournal of Comparative Neurology
Volume495
Issue number4
DOIs
StatePublished - Apr 1 2006

Fingerprint

Motor Cortex
Forelimb
Primates
Saimiri
Parietal Lobe
Somatosensory Cortex
Carisoprodol
Myelin Sheath
Haplorhini
Hand
Staining and Labeling

Keywords

  • Corticocortical
  • Ipsilateral
  • Motor cortex
  • Neuroanatomy, PMV
  • Topographic map

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Dancause, N., Barbay, S., Frost, S. B., Plautz, E. J., Stowe, A. M., Friel, K. M., & Nudo, R. J. (2006). Ipsilateral connections of the ventral premotor cortex in a new world primate. Journal of Comparative Neurology, 495(4), 374-390. https://doi.org/10.1002/cne.20875

Ipsilateral connections of the ventral premotor cortex in a new world primate. / Dancause, Numa; Barbay, Scott; Frost, Shawn B.; Plautz, Erie J.; Stowe, Ann M.; Friel, Kathleen M.; Nudo, Randolph J.

In: Journal of Comparative Neurology, Vol. 495, No. 4, 01.04.2006, p. 374-390.

Research output: Contribution to journalArticle

Dancause, N, Barbay, S, Frost, SB, Plautz, EJ, Stowe, AM, Friel, KM & Nudo, RJ 2006, 'Ipsilateral connections of the ventral premotor cortex in a new world primate', Journal of Comparative Neurology, vol. 495, no. 4, pp. 374-390. https://doi.org/10.1002/cne.20875
Dancause N, Barbay S, Frost SB, Plautz EJ, Stowe AM, Friel KM et al. Ipsilateral connections of the ventral premotor cortex in a new world primate. Journal of Comparative Neurology. 2006 Apr 1;495(4):374-390. https://doi.org/10.1002/cne.20875
Dancause, Numa ; Barbay, Scott ; Frost, Shawn B. ; Plautz, Erie J. ; Stowe, Ann M. ; Friel, Kathleen M. ; Nudo, Randolph J. / Ipsilateral connections of the ventral premotor cortex in a new world primate. In: Journal of Comparative Neurology. 2006 ; Vol. 495, No. 4. pp. 374-390.
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