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Titolo:
Modulation of exteroceptive suppression periods in human jaw-closing muscles induced by summation of nociceptive and non-nociceptive inputs
Autore:
Romaniello, A; Svensson, P; Cruccu, G; Arendt-Nielsen, L;
Indirizzi:
Univ Aalborg, Ctr Sensory Motor Interact, Orofacial Pain Lab, DK-9220 Aalborg S, Denmark Univ Aalborg Aalborg Denmark S cial Pain Lab, DK-9220 Aalborg S, Denmark Univ La Sapienza, Dept Neurol Sci, Rome, Italy Univ La Sapienza Rome Italy v La Sapienza, Dept Neurol Sci, Rome, Italy Univ Aarhus, Royal Dent Coll, Dept Prosthet Dent & Stomatognath Physiol, DK-8000 Aarhus, Denmark Univ Aarhus Aarhus Denmark DK-8000 nath Physiol, DK-8000 Aarhus, Denmark
Titolo Testata:
EXPERIMENTAL BRAIN RESEARCH
fascicolo: 3, volume: 132, anno: 2000,
pagine: 306 - 313
SICI:
0014-4819(200006)132:3<306:MOESPI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MASSETER INHIBITORY REFLEX; MEDULLARY DORSAL HORN; BRAIN-STEM; AFFERENT-FIBERS; TOOTH-PULP; SUBNUCLEUS INTERPOLARIS; INFLAMMATORY IRRITANT; TEMPORALIS MUSCLE; FLEXION REFLEX; STIMULATION;
Keywords:
exteroceptive suppression periods; cutaneous tonic pain; capsaicin; tactile stimulation; presynaptic modulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Svensson, P Univ Aalborg, Ctr Sensory Motor Interact, Orofacial Pain Lab, Fredrik Bajers Vej 7 D-3, DK-9220 Aalborg S, Denmark Univ Aalborg Fredrik Bajers Vej 7 D-3 Aalborg Denmark S nmark
Citazione:
A. Romaniello et al., "Modulation of exteroceptive suppression periods in human jaw-closing muscles induced by summation of nociceptive and non-nociceptive inputs", EXP BRAIN R, 132(3), 2000, pp. 306-313

Abstract

Convergence of various afferent inputs onto brain-stem neurons may play animportant role in the regulation of trigeminal motor function. The presentstudy examined the efficacy of nociceptive and non-nociceptive perioral stimulation for the modulation of the two exteroceptive suppression periods (ES1 and ES2) in human jaw-closing muscles. The inhibitory jaw-reflexes, ES1(10-15 ms onset) and ES2 (40-50 ms onset), were recorded as the surface electromyogram of masseter and temporalis muscles in 14 healthy subjects. Non-painful electrical stimuli were applied to the right mental nerve while the subject was biting at 50% of the maximal voluntary force. Five conditionswere compared: baseline, repetitive tactile stimulation (1 Hz) on the right cheek, topical application of capsaicin (5%) on the right cheek, repetitive tactile stimulation plus capsaicin, and post-baseline. The perceived intensity of the electrical stimuli was evaluated by the subjects on a 0-10 rating scale. Capsaicin alone failed to induce significant changes of ES1 andES2; tactile stimulation alone induced a significant delay in the onset ofES2 (P<0.001). During repetitive tactile stimulation plus capsaicin, the duration of ES1 and ES2 was shortened (ES1 and ES2: P<0.001) and the degree of suppression was reduced (ES1: P<0.05; ES2: P<0.005). Perceived intensityof the electrical Stimuli was unchanged during the different experimental conditions. The present results suggest summation of simultaneous nociceptive and non-nociceptive inputs plays an important role in the modulation of the neural pathways involved in the short-latency ES1 and long-latency ES2.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 20:55:35