Article ; Online: A change in behavioral state switches the pattern of motor output that underlies rhythmic head and orofacial movements.
2023 Volume 33, Issue 10, Page(s) 1951–1966.e6
Abstract: The breathing rhythm serves as a reference that paces orofacial motor actions and orchestrates active sensing. Past work has reported that pacing occurs solely at a fixed phase relative to sniffing. We re-evaluated this constraint as a function of ... ...
Abstract | The breathing rhythm serves as a reference that paces orofacial motor actions and orchestrates active sensing. Past work has reported that pacing occurs solely at a fixed phase relative to sniffing. We re-evaluated this constraint as a function of exploratory behavior. Allocentric and egocentric rotations of the head and the electromyogenic activity of the motoneurons for head and orofacial movements were recorded in free-ranging rats as they searched for food. We found that a change in state from foraging to rearing is accompanied by a large phase shift in muscular activation relative to sniffing, and a concurrent change in the frequency of sniffing, so that pacing now occurs at one of the two phases. Further, head turning is biased such that an animal gathers a novel sample of its environment upon inhalation. In total, the coordination of active sensing has a previously unrealized computational complexity. This can emerge from hindbrain circuits with fixed architecture and credible synaptic time delays. |
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MeSH term(s) | Rats ; Animals ; Vibrissae/physiology ; Movement/physiology ; Exploratory Behavior/physiology ; Rhombencephalon ; Motor Neurons ; Head Movements/physiology |
Language | English |
Publishing date | 2023-04-26 |
Publishing country | England |
Document type | Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't |
ZDB-ID | 1071731-6 |
ISSN | 1879-0445 ; 0960-9822 |
ISSN (online) | 1879-0445 |
ISSN | 0960-9822 |
DOI | 10.1016/j.cub.2023.04.008 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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