Representation of rhythmic chunking in striatum of mice executing complex continuous movement sequences.
Cell Rep
; 43(6): 114312, 2024 Jun 25.
Article
in En
| MEDLINE
| ID: mdl-38848217
ABSTRACT
We used a step-wheel system to examine the activity of striatal projection neurons as mice practiced stepping on complexly arranged foothold pegs in this Ferris-wheel-like device to receive reward. Sets of dorsolateral striatal projection neurons were sensitive to specific parameters of repetitive motor coordination during the runs. They responded to combinations of the parameters of continuous movements (interval, phase, and repetition), forming "chunking responses"-some for combinations of these parameters across multiple body parts. Recordings in sensorimotor cortical areas exhibited notably fewer such responses but were documented for smaller neuron sets whose heterogeneity was significant. Striatal movement encoding via chunking responsivity could provide insight into neural strategies governing effective motor control by the striatum. It is possible that the striking need for external rhythmic cuing to allow movement sequences by Parkinson's patients could, at least in part, reflect dysfunction in such striatal coding.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Corpus Striatum
/
Movement
Limits:
Animals
Language:
En
Journal:
Cell Rep
Year:
2024
Document type:
Article
Affiliation country: