Plasticity of stereotyped birdsong driven by chronic manipulation of cortical-basal ganglia activity
| Autor: | Mimi H. Kao, Sanne Moorman, Jae-Rong Ahn |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
0301 basic medicine Movement disorders Biology Article Basal Ganglia General Biochemistry Genetics and Molecular Biology 03 medical and health sciences Bursting 0302 clinical medicine Basal ganglia medicine Learning Animals Zebra finch Motor skill Cerebral Cortex Neuronal Plasticity biology.organism_classification Songbird 030104 developmental biology nervous system behavior and behavior mechanisms Vocal learning Finches Vocalization Animal medicine.symptom General Agricultural and Biological Sciences Motor learning Neuroscience psychological phenomena and processes 030217 neurology & neurosurgery |
| Zdroj: | Curr Biol |
| ISSN: | 0960-9822 |
| DOI: | 10.1016/j.cub.2021.04.030 |
| Popis: | Cortical-basal ganglia (CBG) circuits are critical for motor learning and performance, and are a major site of pathology. In songbirds, a CBG circuit regulates moment-by-moment variability in song and also enables song plasticity. Studies have shown that variable burst firing in LMAN, the output nucleus of this CBG circuit, actively drives acute song variability, but whether and how LMAN drives long-lasting changes in song remains unclear. Here, we ask whether chronic pharmacological augmentation of LMAN bursting is sufficient to drive plasticity in birds singing stereotyped songs. We show that altered LMAN activity drives cumulative changes in acoustic structure, timing, and sequencing over multiple days, and induces repetitions and silent pauses reminiscent of human stuttering. Changes persisted when LMAN was subsequently inactivated, indicating plasticity in song motor regions. Following cessation of pharmacological treatment, acoustic features and song sequence gradually recovered to their baseline values over a period of days to weeks. Together, our findings show that augmented bursting in CBG circuitry drives plasticity in well-learned motor skills, and may inform treatments for basal ganglia movement disorders. |
| Databáze: | OpenAIRE |
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