Neural Population Dynamics during Reaching Are Better Explained by a Dynamical System than Representational Tuning.

ABSTRACT: Recent models of movement generation in motor cortex have sought to explain neural activity not as a function of movement parameters, known as representational models, but as a dynamical system acting at the level of the population. Despite evidence supporting this framework, the evaluation of representational models and their integration with dynamical systems is incomplete in the literature. Using a representational velocity-tuning based simulation of center-out reaching, we show that incorporating variable latency offsets between neural activity and kinematics is sufficient to generate rotational dynamics at the level of neural populations, a phenomenon observed in motor cortex. However, we developed a covariance-matched permutation test (CMPT) that reassigns neural data between task co

SUBMITTER: Michaels JA 

PROVIDER: S-EPMC5096671 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature