6533b830fe1ef96bd12968bc

RESEARCH PRODUCT

Evidence of a contralateral motor influence on reciprocal inhibition in man

V. La GruttaGiuseppe FerraroG. CaravagliosM. SabatinoPierangelo SardoPaul Delwaide

subject

AdultAdolescentInterneuronMovementWithdrawal reflexStimulationStimulus (physiology)H-ReflexInterneuronsSkin Physiological PhenomenaReflexHumansMedicineBiological PsychiatryRadial nerveSkinMotor NeuronsReflex Monosynapticbusiness.industryGeneral NeuroscienceAntagonistReciprocal inhibitionNeural InhibitionElectric StimulationPsychiatry and Mental healthmedicine.anatomical_structureNeurologyRadial NerveNeurology (clinical)H-reflexbusinessNeuroscience

description

The role of contralateral movement on both H reflex and reciprocal inhibition was studied. In normal men H reflex was induced by median nerve stimulation. Reciprocal inhibition was achieved through stimulation of the antagonist radial nerve. On this basis the effects of contralateral arm movement were analized. Furthermore the putative influence of exteroceptive origin was also verified by means of digit stimulation. Results showed that contralateral arm movement did not affect H reflex amplitude; on the contrary, it was able to enhance reciprocal inhibition induced by extensors on flexors. Study of cutaneous afferents demonstrated that contralateral digit stimulation failed to elicit modifications on both H reflex and reciprocal inhibition. On the other hand, ipsilateral digit stimulation lowered H reflex amplitude and increased the degree of reciprocal inhibition. Experimental findings underline the possibility that an informational array reaches the contralateral IA interneurone: therefore a mutual (bilateral) interaction among IA interneurones may accordingly be hypothesised.

yearjournalcountryeditionlanguage
1992-12-01Journal of Neural Transmission - Parkinson's Disease and Dementia Section
https://doi.org/10.1007/bf02260074