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Nature et substratum neurologique du sens de l'effort
LAFARGUE G; SIRIGU A
REV NEUROL (Paris) , 2006, vol. 162, n° 6-7, p. 703-712 Doc n°: 126077 Localisation : Documentation IRR Descripteurs : AB1 - ETUDES GENERALES - MUSCLES, AD3 - MOTRICITE What are the nature and the neural substrate of voluntary force perception ? Experimental findings demonstrate that efferent signals related to motor command play a dominant role in perceiving voluntary muscular force. This suggests that voluntary force perception is provided through a sense of effort and not through a sense of intramuscular tension. Nevertheless, experimental data show that the contribution of sensory input to effort awareness must not be dismissed. Sensory signals are not involved in generating a signal of effort but rather in calibrating and modulating its magnitude. Neuroimaging and neuropsychological studies revealed that many cortical structures are activated during tasks of voluntary muscular force perception. CONCLUSION: In such tasks, the basal ganglia might support the coherence of cortical activity. Langue : FRANCAIS |
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