Human Motor Cortex Encodes Complex Handwriting Through a Sequence of Primitive Neural States
Yu Qi,
Xinyun Zhu,
Xinzhu Xiong
et al.
Abstract:How the human motor cortex (MC) orchestrates sophisticated fine movements such as handwriting remains a puzzle1–3. Here, we investigate this question through Utah array recordings from human MC hand knob, during imagined handwriting of Chinese characters (306 characters tested, 6.3 ± 2.0 strokes per character). We find MC programs the writing of complicated characters by sequencing a small set of primitive states: The directional tuning of motor neurons remains stable within each primitive state but strongly v… Show more
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