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Cells in somatosensory areas show synchrony with beta oscillations in monkey motor cortex

Lookup NU author(s): Dr Claire Witham, Professor Stuart Baker

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Abstract

Oscillatory synchronization between somatosensory and motor cortex has previously been reported using field potential recordings, but interpretation of such results can be confounded by volume conduction. We examined coherence between single-unit discharge in somatosensory/parietal areas and local field potential from the same area as the unit, or from the motor cortex, in two macaque monkeys trained to perform a finger movement task. There were clear coherence peaks at ∼17.5 Hz for cells in the primary somatosensory cortex (both proprioceptive and cutaneous areas) and posterior parietal cortex (area 5). The size of coherence in all areas was comparable to previous reports analysing motor cortical cells and M1 field potentials. Many coherence phases clustered around -π/2 radians, indicating zero lag synchronization of parietal cells with M1 oscillatory activity. These results indicate that cells in somatosensory and parietal areas have information about the presence of oscillations in the motor system. Such oscillatory coupling across the central sulcus may play an important role in sensorimotor integration of both proprioceptive and cutaneous signals. © The Authors (2007).


Publication metadata

Author(s): Witham CL, Wang M, Baker SN

Publication type: Article

Publication status: Published

Journal: European Journal of Neuroscience

Year: 2007

Volume: 26

Issue: 9

Pages: 2677-2686

Print publication date: 01/11/2007

ISSN (print): 0953-816X

ISSN (electronic): 1460-9568

Publisher: Wiley-Blackwell Publishing Ltd.

URL: http://dx.doi.org/10.1111/j.1460-9568.2007.05890.x

DOI: 10.1111/j.1460-9568.2007.05890.x

PubMed id: 17970720


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