Back to Search
Start Over
Learning New Feedforward Motor Commands Based on Feedback Responses
- Source :
- Brain and Mind Institute Researchers' Publications
- Publication Year :
- 2019
-
Abstract
- © 2020 Elsevier Inc. Learning a new motor task modifies feedforward (i.e., voluntary) motor commands and such learning also changes the sensitivity of feedback responses (i.e., reflexes) to mechanical perturbations [1–9]. For example, after people learn to generate straight reaching movements in the presence of an external force field or learn to reduce shoulder muscle activity when generating pure elbow movements with shoulder fixation, evoked stretch reflex responses to mechanical perturbations reflect the learning expressed during self-initiated reaching. Such a transfer from feedforward motor commands to feedback responses is thought to take place because of shared neural circuits at the level of the spinal cord, brainstem, and cerebral cortex [10–13]. The presence of shared neural resources also predicts the transfer from feedback responses to feedforward motor commands. Little is known about such a transfer presumably because it is relatively hard to elicit learning in reflexes without engaging associated voluntary responses following mechanical perturbations. Here, we demonstrate such transfer by leveraging two approaches to elicit stretch reflexes while minimizing engagement of voluntary motor responses in the learning process: applying very short mechanical perturbations [14–19] and instructing participants to not respond to them [20–26]. Taken together, our work shows that transfer between feedforward and feedback control is bidirectional, furthering the notion that these processes share common neural circuits that underlie motor learning and transfer.
- Subjects :
- 0301 basic medicine
stretch reflex
Adult
Male
Adolescent
Feedback control
Internal model
upper limb
Biology
Motor Activity
General Biochemistry, Genetics and Molecular Biology
03 medical and health sciences
Young Adult
0302 clinical medicine
Reflex
medicine
Biological neural network
Reaction Time
Psychology
Humans
Stretch reflex
intersegmental dynamics
Feedback, Physiological
internal model
Motor commands
Feed forward
Neurosciences
reaching
feedback control
030104 developmental biology
medicine.anatomical_structure
Female
General Agricultural and Biological Sciences
Motor learning
Neuroscience
motor learning
030217 neurology & neurosurgery
Algorithms
Psychomotor Performance
Software
Subjects
Details
- ISSN :
- 18790445
- Volume :
- 30
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Current biology : CB
- Accession number :
- edsair.doi.dedup.....d24b382bfdcb2ce689c54ffbf53d16f1