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Titolo:
IMPAIRED JAW OPENING REFLEX IN WHIPLASH I NJURY
Autore:
KEIDEL M; RIESCHKE P; JUPTNER M; DIENER HC;
Indirizzi:
UNIV ESSEN GESAMTHSCH,NEUROL KLIN,HUFELANDSTR 55 D-45122 ESSEN GERMANY
Titolo Testata:
Nervenarzt
fascicolo: 4, volume: 65, anno: 1994,
pagine: 241 - 249
SICI:
0028-2804(1994)65:4<241:IJORIW>2.0.ZU;2-6
Fonte:
ISI
Lingua:
GER
Soggetto:
TEMPORALIS MUSCLE-ACTIVITY; MASSETER INHIBITORY PERIODS; TOOTH-PULP STIMULATION; TENSION-TYPE HEADACHE; EXTEROCEPTIVE SUPPRESSION; ELECTRICAL-STIMULATION; HEALTHY-VOLUNTEERS; MENTAL NERVE; BRAIN-STEM; NECK;
Keywords:
WHIPLASH INJURY; INHIBITORY TEMPORALIS REFLEX; EXTEROCEPTIVE SUPPRESSION; ANTINOCICEPTIVE BRAIN-STEM REFLEX; CERVICO-CEPHALIC SYNDROME; POSTTRAUMATIC HEADACHE; ACCELERATION TRAUMA; CERVICAL SPINE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
61
Recensione:
Indirizzi per estratti:
Citazione:
M. Keidel et al., "IMPAIRED JAW OPENING REFLEX IN WHIPLASH I NJURY", Nervenarzt, 65(4), 1994, pp. 241-249

Abstract

The brainstem mediated inhibitory reflex of the m. temporalis was investigated on average 3 days after the accident in 61 patients (f = 36;m = 25; mean age = 28 years +/- 9 SD) who presented an acute cervicocephalic syndrome with posttraumatic headache and neck pain following acute whiplash injury but without neurological deficits, bone injury ofthe cervical spine or combined direct head trauma. We postulated a disturbed reflexive temporalis muscle inhibition in patients with ,whiplash cephalalgia', as has previously been reported for classical muscletension headache. Latencies and durations of the early and late exteroceptive EMG suppression (ES1 and ES2) and the interposed EMG activity(IE) of the voluntarily contracted right temporalis muscle following ipsilateral stimulation of V/2 + 3 afferents were recorded. The reflexdata were compared to a cohort of 69 age and sex matched normal subjects (f = 37; m = 32; mean age = 28 years +/- 7 SD). The following significant reflex changes were found in patients: a shortened duration ofES2 with delayed onset and premature ending, a slight prolongation ofES1 and IE, a delayed onset of IE and a diminished ratio of ES2:ES1 and ES2:IE. We conclude that the abnormality of the antinociceptive reflex is based on a transient dysfunction of the brainstem mediated reflex circuit following the acceleration trauma, which can be considered a neurophysiological correlate of the posttraumatic cervicocephalic pain syndrome and may be useful as a, biological marker' in monitoring the time course of recovery from pain. The results indicate that a ,pathological' inhibitory temporalis reflex is not specific to tension-type headache and that the electrophysiological reflex examination is also of diagnostic value in posttraumatic headache.

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Documento generato il 27/11/20 alle ore 21:21:10