Bursts of beta oscillation differentiate postperformance activity in the striatum and motor cortex of monkeys performing movement tasks
Abstract
Studies of beta oscillations, highlighted clinically because of exaggerated beta-band activity in Parkinson’s disease, have focused on measures averaged over multiple trials, and readers outside the field could have the misperception that beta oscillations persist over seconds. We show that brief bursts of oscillation are responsible for virtually all beta-band activity in healthy monkeys. The state called “beta synchronization” consists of numerous brief (∼40–120 ms) bouts of oscillation within a nonoscillatory background, and these bouts can also occur during periods of “desynchronization.” Thus, postmovement “synchronization” of beta represents a transient increase in oscillation probability, with different time courses in the motor cortex and striatum. We suggest that the timing and duration of these bursts are critical parameters for network function.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 12, 2015
- Source ID
- 10.1073/pnas.1517629112
Entities
People
- Ann Graybiel
- Brian Depasquale
- Daniel J. Gibson
- Joseph Feingold
Organizations
- Massachusetts Institute of Technology
- National Institute of Neurological Disorders and Stroke
- Office of Naval Research