The sensory mechanism of servo action in human muscle.
Population
Human subjects
Comparison
Peripheral anaesthesia vs Normal (unanaesthetized) state
Design
Other
Authors
Discussion
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Member takes
Implication
Hypothesis-generating for differential proprioceptive servo control; leaves open generalization to other muscles or clinical motor function.
Structured PICO
P
Population
Human subjects
I
Intervention
Peripheral anaesthesia (specifically of the thumb or other digits)
C
Comparator
Normal (unanaesthetized) state
O
Outcome
Servo action in the long flexor of the thumb during movements of the terminal phalanxsurrogate
Peripheral anaesthesia suppresses servo action in the thumb but not in other tested muscles, suggesting that for the thumb, muscle afferents cooperate with somatic and visual inputs in a servo loop via the cerebral cortex.
Cite This Study
Marsden et al. (1977) studied this question.