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Titolo:
Effects of repetitive motor training on movement representations in adult squirrel monkeys: Role of use versus learning
Autore:
Plautz, EJ; Milliken, GW; Nudo, RJ;
Indirizzi:
Univ Kansas, Med Ctr, Ctr Aging, Kansas City, KS 66160 USA Univ Kansas Kansas City KS USA 66160 Ctr Aging, Kansas City, KS 66160 USA Univ Texas, Dept Neurobiol & Anat, Houston, TX 77030 USA Univ Texas Houston TX USA 77030 t Neurobiol & Anat, Houston, TX 77030 USA Coll Charleston, Dept Psychol, Charleston, SC 29424 USA Coll Charleston Charleston SC USA 29424 Psychol, Charleston, SC 29424 USA Univ Kansas, Med Ctr, Dept Mol & Integrat Physiol, Kansas City, KS 66160 USA Univ Kansas Kansas City KS USA 66160 t Physiol, Kansas City, KS 66160 USA
Titolo Testata:
NEUROBIOLOGY OF LEARNING AND MEMORY
fascicolo: 1, volume: 74, anno: 2000,
pagine: 27 - 55
SICI:
1074-7427(200007)74:1<27:EORMTO>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMARY SOMATOSENSORY CORTEX; POSITRON EMISSION TOMOGRAPHY; PRIMARY AUDITORY-CORTEX; OWL MONKEYS; FUNCTIONAL REORGANIZATION; CORTICAL PLASTICITY; SUPPLEMENTARY MOTOR; NEURONAL-ACTIVITY; AREA 3B; MAPS;
Keywords:
motor cortex; intracortical microstimulation (ICMS); squirrel monkey; motor learning; motor activity; representational mapping; cortical plasticity; hand; nonhuman primates;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Nudo, RJ Univ Kansas, Med Ctr, Ctr Aging, 3901 Rainbow Blvd, Kansas City, KS 66160 USA Univ Kansas 3901 Rainbow Blvd Kansas City KS USA 66160 66160 USA
Citazione:
E.J. Plautz et al., "Effects of repetitive motor training on movement representations in adult squirrel monkeys: Role of use versus learning", NEUROBIOL L, 74(1), 2000, pp. 27-55

Abstract

Current evidence indicates that repetitive motor behavior during motor learning paradigms can produce changes in representational organization in motor cortex. In a previous study, we trained adult squirrel monkeys on a repetitive motor task that required the retrieval of food pellets from a small-diameter well. It was found that training produced consistent task-related changes in movement representations in primary motor cortex (M1) in conjunction with the acquisition of a new motor skill, In the present study, we trained adult squirrel monkeys on a similar motor task that required pellet retrievals from a much larger diameter well. This large-well retrieval task was designed to produce repetitive use of a limited set of distal forelimb movements in the absence of motor skill acquisition. Motor activity levels,estimated by the total number of finger flexions performed during training, were matched between the two training groups. This experiment was intended to evaluate whether simple, repetitive motor activity alone is sufficientto produce representational plasticity in cortical motor maps. Detailed analysis of the motor behavior of the monkeys indicates that their retrieval behavior was highly successful and stereotypical throughout the training period, suggesting that no new motor skills were learned during the performance of the large-well retrieval task. Comparisons between pretraining and posttraining maps of hll movement representations revealed no task-related changes in the cortical area devoted to individual distal forelimb movement representations. We conclude that repetitive motor activity alone does not produce functional reorganization of cortical maps. Instead, we propose thatmotor skill acquisition, or motor learning. is a prerequisite factor in driving representational plasticity in M1. (C) 2000 Academic Press.

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Documento generato il 06/04/20 alle ore 01:01:48