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- W2189047741 abstract "The activity of single neurons in the monkey motor cortex was studied during semi-naturalistic, unstructured arm movements made spontaneouslybythemonkeyandmeasuredwithahighresolutionthree-dimensionaltrackingsystem.Weaskedhowmuchofthetotal neuronal variance could be explained by various models of neuronal tuning to movement. On average, tuning to the speed of the hand accountedfor1%ofthetotalvarianceinneuronalactivity,tuningtothedirectionofthehandinspaceaccountedfor8%,amorecomplex modelofdirectiontuning,inwhichthepreferreddirectionoftheneuronrotatedwiththestartingpositionofthearm,accountedfor13%, tuning to the final position of the hand in Cartesian space accounted for 22%, and tuning to the final multijoint posture of the arm accountedfor36%.Oneinterpretationisthatmotorcortexneuronsaresignificantlytunedtomanycontrolparametersimportantinthe animal’srepertoire,butthatdifferentcontrolparametersarerepresentedindifferentproportion,perhapsreflectingtheirprominencein everyday action. The final posture of a movement is an especially prominent control parameter although not the only one. A common mode of action of the monkey arm is to maintain a relatively stable overall posture while making local adjustments in direction during performanceofatask.Onespeculationisthatneuronsinmotorcortexreflectthispatterninwhichdirectiontuningpredominatesinlocal regionsofspaceandposturaltuningpredominatesoverthelargerworkspace." @default.
- W2189047741 created "2016-06-24" @default.
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- W2189047741 date "2007-01-01" @default.
- W2189047741 modified "2023-09-26" @default.
- W2189047741 title "RelationshipbetweenUnconstrainedArmMovementsand Single-NeuronFiringintheMacaqueMotorCortex" @default.
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