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Titolo:
Abnormal interaction between vestibular and voluntary head control in patients with spasmodic torticollis
Autore:
Munchau, A; Corna, S; Gresty, MA; Bhatia, KP; Palmer, JD; Dressler, D; Quinn, NP; Rothwell, JC; Bronstein, AM;
Indirizzi:
Natl Hosp Neurol & Neurosurg, Human Movement & Balance Unit, MRC, London WC1N 3BG, England Natl Hosp Neurol & Neurosurg London England WC1N 3BG n WC1N 3BG, England Univ Coll London, Inst Neurol, Dept Clin Neurol, London, England Univ CollLondon London England urol, Dept Clin Neurol, London, England Derriford Hosp, Dept Neurosurg, Plymouth PL6 8DH, Devon, England DerrifordHosp Plymouth Devon England PL6 8DH uth PL6 8DH, Devon, England IRCCS, Div Phys Therapy & Rehabil, Salvatore Maugeri Fdn, Novara, Italy IRCCS Novara Italy rapy & Rehabil, Salvatore Maugeri Fdn, Novara, Italy Univ Rostock, Dept Neurol, Rostock, Germany Univ Rostock Rostock Germany niv Rostock, Dept Neurol, Rostock, Germany
Titolo Testata:
BRAIN
, volume: 124, anno: 2001,
parte:, 1
pagine: 47 - 59
SICI:
0006-8950(200101)124:<47:AIBVAV>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRANIAL DYSTONIA; DYNAMIC BALANCE; BRAIN-STEM; FREE-FALL; NECK; RESPONSES; BLEPHAROSPASM; INHIBITION; REFLEXES; LESIONS;
Keywords:
spasmodic torticollis; head drop; vestibulo-collic reflex; startle reflex; reaction time;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Bronstein, AM Natl Hosp Neurol & Neurosurg, Human Movement & Balance Unit,MRC, Queen Sq, London WC1N 3BG, England Natl Hosp Neurol & Neurosurg QueenSq London England WC1N 3BG
Citazione:
A. Munchau et al., "Abnormal interaction between vestibular and voluntary head control in patients with spasmodic torticollis", BRAIN, 124, 2001, pp. 47-59

Abstract

The functional status of vestibulo-collic reflexes in the sternocleidomastoid (SCM) muscles was investigated in 24 patients with spasmodic torticollis using small, abrupt (drops' of the head. None had been treated with botulinum toxin injections during at least 4 months preceding the study. Eight of the patients, four of whom had been studied before surgery, were also studied after selective peripheral denervation of neck muscles. The reflex wasof normal latency and duration in the 'passive drop' condition, in which subjects were instructed not to oppose the fall of the head. To study voluntary interaction with the reflex response, subjects were then asked to flex the neck as quickly as possible after onset of the head drop ('active drop'). In this condition, voluntary responses in patients were delayed, smallerand less effective in counteracting the head fall than in normal subjects. The same abnormalities were also found in patients after surgery when the head posture was improved, Somatosensory/auditory voluntary reaction times in SCM were normal, as was the latency of the startle reflex. We conclude that voluntary interaction with the vestibulo-collic reflex is disrupted in patients with spasmodic torticollis, a finding which corroborates the patients' aggravation of their symptoms by head or body perturbations. Lack of effective interaction between two major systems controlling head position may contribute to torticollis.

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Documento generato il 20/01/20 alle ore 05:15:53