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Titolo:
Prolonged orbicularis oculi activity - A major factor in apraxia of lid opening
Autore:
Tozlovanu, V; Forget, R; Iancu, A; Boghen, D;
Indirizzi:
Inst Readaptat Montreal, Ctr Rech Interdisciplinarie Readaptat, Montreal, PQ H3S 2J4, Canada Inst Readaptat Montreal Montreal PQ Canada H3S 2J4 al, PQ H3S 2J4, Canada Univ Montreal, Ctr Hosp, Hotel Dieu, Ctr Rech Sci Neurol, Montreal, PQ, Canada Univ Montreal Montreal PQ Canada r Rech Sci Neurol, Montreal, PQ, Canada Univ Montreal, Ctr Hosp, Hotel Dieu, Dept Neurol, Montreal, PQ, Canada Univ Montreal Montreal PQ Canada Dieu, Dept Neurol, Montreal, PQ, Canada Univ Montreal, Ecole Readaptat, Montreal, PQ, Canada Univ Montreal Montreal PQ Canada , Ecole Readaptat, Montreal, PQ, Canada
Titolo Testata:
NEUROLOGY
fascicolo: 6, volume: 57, anno: 2001,
pagine: 1013 - 1018
SICI:
0028-3878(20010925)57:6<1013:POOA-A>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROGRESSIVE SUPRANUCLEAR PALSY; LEVATOR PALPEBRAE-SUPERIORIS; ELECTROMYOGRAPHIC FEATURES; BLEPHAROSPASM; DYSTONIA; MUSCLE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Forget, R Inst Readaptat Montreal, Ctr Rech Interdisciplinarie Readaptat, 6300 Darlington, Montreal, PQ H3S 2J4, Canada Inst Readaptat Montreal 6300 Darlington Montreal PQ Canada H3S 2J4
Citazione:
V. Tozlovanu et al., "Prolonged orbicularis oculi activity - A major factor in apraxia of lid opening", NEUROLOGY, 57(6), 2001, pp. 1013-1018

Abstract

Background: Apraxia of lid opening (ALO) is a nonparalytic inability to open the eyes at will in the absence of visible contraction of the orbicularis oculi (OOc) muscle. Objective: To test the hypothesis that sustained activity of the OOc is a major factor in the difficulty in opening the eyes in this condition. Methods: Lid movement detected in an electromagnetic field and electromyogram activity of the septal and pretarsal portions of the OOcwere recorded in 12 healthy control subjects and 12 patients with a clinical diagnosis of ALO. The latencies to onset and to complete eye opening andthe time during which eye opening was sustained were measured and analyzedin relation to OOc activity. Results: The lid opening latencies and the lid movement duration were significantly increased in patients compared with control values. An abnormal persistence of OOc activity was present in 10 of the 11 patients with a delay in complete lid opening. The complete lid opening delay showed a strong positive correlation with the time it took to inhibit the OOc activity. This relationship fit the same linear regression in both groups. Conclusions: Patients with ALO show significant delays in eye opening. An abnormal persistence of OOc activity, detectable electromyographically but not clinically, could be the main factor contributing to the delay in lid opening in these patients.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 01:54:52