Specific modulation of presynaptic and recurrent inhibition of the soleus muscle during lengthening and shortening submaximal and maximal contractions
Athina Papitsa, Christos Païzis, Maria Papaiordanidou, Alain Martin
Abstract
Presynaptic (PI) and recurrent inhibitions (RI) were studied during passive muscle lengthening and eccentric contractions. Results indicate that the increased PI during passive muscle lengthening accounts for the decreased spinal excitability at rest. During eccentric contraction both mechanisms contribute to spinal excitability modulation. The same amount of PI was observed during eccentric contractions, while RI decreased as developed torque increased. This distinct modulation according to torque level suggests a distinct supraspinal control of these mechanisms.
Topics & Concepts
EccentricSoleus muscleContraction (grammar)Muscle contractionInternal medicineEccentric exerciseEndocrinologyAnatomyChemistryMedicineSkeletal musclePhysicsMuscle damageQuantum mechanicsMuscle activation and electromyography studiesTranscranial Magnetic Stimulation StudiesMotor Control and Adaptation