Neural population dynamics in motor cortex are different for reach and grasp
Data files
Oct 28, 2020 version files 2.97 GB
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Dataset1_Monkey1_Session1_GraspDataSequentialRecording.mat
152.69 MB
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Dataset1_Monkey1_Session2_GraspDataSequentialRecording.mat
149 MB
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Dataset1_Monkey1_Session3_GraspDataSequentialRecording.mat
174.68 MB
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Dataset1_Monkey1_Session4_GraspDataSequentialRecording.mat
165.86 MB
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Dataset1_Monkey1_Session5_GraspDataSequentialRecording.mat
160.19 MB
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Dataset1_Monkey1_Session6_GraspDataSequentialRecording.mat
148.21 MB
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Dataset2_Monkey2_Session1_GraspDataSequentialRecording.mat
161.30 MB
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Dataset2_Monkey2_Session2_GraspDataSequentialRecording.mat
159.40 MB
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Dataset2_Monkey2_Session3_GraspDataSequentialRecording.mat
146.93 MB
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Dataset2_Monkey2_Session4_GraspDataSequentialRecording.mat
116.73 MB
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Dataset2_Monkey2_Session5_GraspDataSequentialRecording.mat
154.60 MB
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Dataset2_Monkey2_Session6_GraspDataSequentialRecording.mat
162.50 MB
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Dataset2_Monkey2_Session7_GraspDataSequentialRecording.mat
165.33 MB
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Dataset2_Monkey2_Session8_GraspDataSequentialRecording.mat
168.29 MB
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Dataset2_Monkey2_Session9_GraspDataSequentialRecording.mat
160.34 MB
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Dataset3_Monkey3_Session1_GraspDataSimultaneousRecording.mat
182.97 MB
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Dataset4_Monkey1_Session1_GraspDataSimultaneousRecording.mat
178.79 MB
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Dataset5_Monkey4_Session1_ReachDataSimultaneousRecording.mat
41.41 MB
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Dataset6_Monkey5_Session1_ReachDataSimultaneousRecording.mat
145.06 MB
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lfads_data.mat
72.27 MB
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ReadMe.md
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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.
Details of the collection of this dataset and its pre-processing are given in the eLife publication that it will accompany.
Details of the dataset and its structure are given in the ReadMe.md file included with the dataset.