Relationships between sensory responsiveness and premovement activity of quickly adapting neurons in areas 3b and 1 of monkey primary somatosensory cortex.

作者: R.J. Nelson , B.N. Smith , V.D. Douglas

DOI: 10.1007/BF00231763

关键词: Somatosensory evoked potentialStimulus (physiology)Sensory systemSomatosensory systemBody movementNeuroscienceReceptive fieldSensory cuePsychologyPremovement neuronal activity

摘要: When monkeys make wrist movements in response to vibration of their hands, primary somatosensory (SI) cortical neurons that adapt quickly the vibratory stimulus often exhibit two temporally separate types activity. Initially, these respond stimulus. They then cease discharging, only resume firing prior movement. This activation, cessation and reactivation occurs even though sensory remains on until after movement is begun. The first change activity most likely related input. second, which has been called premovement activity, may have a component as well one upcoming We wanted test hypothesis exhibited when present represents both neuron's normally absent. also determine if area 3b 1 adapting (QA) show similar or different patterns during initiation execution triggered movements. Four were trained flexion extension stimuli delivered handle animals used control behavioral paradigm. Two four made following visual cues. found QA located (but not 3b) comprised sensory-related movement-related component. magnitude individual components differs relationship receptive field type, direction external force imposed stimulated forelimb. Premovement at same time movement, regardless whether cues are trigger about others observed elevations threshold for tactile perception, suggesting changes responsiveness before be related. These previous findings construct model predict SI tasks. suggest areas roles processing task-related information.

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