Skip to main content
Dryad logo

Neural population dynamics in motor cortex are different for reach and grasp

Citation

Suresh, Aneesha et al. (2020), Neural population dynamics in motor cortex are different for reach and grasp, Dryad, Dataset, https://doi.org/10.5061/dryad.xsj3tx9cm

Abstract

Low-dimensional linear dynamics are observed in neuronal population activity in primary motor cortex (M1) when monkeys make reaching movements. This population-level behavior is consistent with a role for M1 as an autonomous pattern generator that drives muscles to give rise to movement. In the present study, we examine whether similar dynamics are also observed during grasping movements, which involve fundamentally different patterns of kinematics and muscle activations. Using a variety of analytical approaches, we show that M1 does not exhibit such dynamics during grasping movements. Rather, the grasp-related neuronal dynamics in M1 are similar to their counterparts in somatosensory cortex, whose activity is driven primarily by afferent inputs rather than by intrinsic dynamics. The basic structure of the neuronal activity underlying hand control is thus fundamentally different from that underlying arm control.Low-dimensional linear dynamics are observed in neuronal population activity in primary motor cortex (M1) when monkeys make reaching movements. This population-level behavior is consistent with a role for M1 as an autonomous pattern generator that drives muscles to give rise to movement. In the present study, we examine whether similar dynamics are also observed during grasping movements, which involve fundamentally different patterns of kinematics and muscle activations. Using a variety of analytical approaches, we show that M1 does not exhibit such dynamics during grasping movements. Rather, the grasp-related neuronal dynamics in M1 are similar to their counterparts in somatosensory cortex, whose activity is driven primarily by afferent inputs rather than by intrinsic dynamics. The basic structure of the neuronal activity underlying hand control is thus fundamentally different from that underlying arm control.

Methods

Details of the collection of this dataset and its pre-processing are given in the eLife publication that it will accompany.

Usage Notes

Details of the dataset and its structure are given in the ReadMe.md file included with the dataset.

Funding

National Institute of Neurological Disorders and Stroke, Award: NS082865

National Institute of Neurological Disorders and Stroke, Award: NS101325

National Institute of Neurological Disorders and Stroke, Award: NS096952

National Institute of Neurological Disorders and Stroke, Award: NS045853

National Institute of Neurological Disorders and Stroke, Award: NS111982