Visual but not proprioceptive signals contribute to detection of sensory-motor perturbation

Elon Gaffin-Cahn, Todd Hudson & Michael Landy
Motor planning studies disrupt visual feedback of hand reaches to measure the amount of motor system compensation. These displacements are often large compared to natural reach variability to increase experimental power. However, they can be unnatural and force subjects to use conscious, potentially biased compensation mechanisms that have different learning and memory parameters and recruit different neural circuitry than when the displacements are undetected. To maximize the signal-to-noise ratio of compensation measurements, displacements should be...
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