The relationship of eyelid movement to the blink reflex.
J Neurol Sci
; 91(1-2): 179-89, 1989 Jun.
Article
en En
| MEDLINE
| ID: mdl-2746289
Although the blink reflex is a standard neurophysiological investigation its relationship with eyelid movement has not been clearly established. We studied normal subjects and patients with unilateral facial paralysis to define the pattern of eyelid movement following glabellar tap, supraorbital nerve stimulation, facial nerve stimulation and direct corneal stimulation. We found that eyelid closure did not necessarily occur in a single movement. Following glabellar tap the first component of a two-stage movement was initiated by levator palpebrae relaxation while with supraorbital nerve stimulation orbicularis oculi contraction produced the first movement. The compound muscle action potential following direct facial nerve stimulation produced only minimal eyelid movement, the major closure being associated with a longer latency orbicularis oculi reflex. Corneal stimulation elicited a single component eyelid movement. Thus, the pattern of eyelid movement differed for each stimulus reflecting variations in orbicularis oculi contraction and levator palpebrae inhibition.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Parpadeo
/
Movimientos Oculares
/
Párpados
Límite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Neurol Sci
Año:
1989
Tipo del documento:
Article
País de afiliación:
Nueva Zelanda
Pais de publicación:
Países Bajos