The Bernstein Center for Computational Neuroscience Freiburg

Announcement for the next
Informal Seminar
Arjun Bansal
Lab of John Donoghue, Brown University, RI, USA

A slow-wave LFP related to hand movements in primate primary motor cortex and ventral premotor cortex

Monday, December 22th, 2008
11:00 h sharp
Library, 1st floor
BCCN Building
Hansastr. 9a
Neuronal activity (local field potentials and spikes) was recorded from intracortical multi-electrode arrays in the primary motor cortex (MI) of three macaque monkeys and in the ventral premotor cortex (PMv) of two macaque monkeys performing reaching and grasping movements towards objects in 3-D space. Hand movements evoked slow-wave local field potentials (< 1 Hz). Previous studies have found similar slow-wave signals in EEG (O'Suilleabhain et al., 1999; van Schie and Bekkering, 2007) and MEG (Jerbi et al., 2007) recordings during hand movements in humans. To the best of our knowledge this is the first report of such slow-wave signals in intracortical LFPs in primate motor cortical areas during reaching movements. O'Suilleabhain et al. have suggested that the slow-wave signal represents "dynamic control of motor cortex activation in response to a periodic visual input, and is therefore a physiologic correlate of the integrative processing involved in [a] skilled visuomotor task." Our results support this proposal.
The talk is open to the public. Guests are cordially invited!