Document Detail

Orbicularis oculi and orbicularis oris reflexes in blepharospasm and torticollis spasmodica during spasm-free intervals.
MedLine Citation:
PMID:  11528155     Owner:  NLM     Status:  MEDLINE    
To investigate possible abnormalities of the blink reflex pathways, we analyzed the latencies and amplitudes of the blink reflex responses in the orbicularis oculi (Ooculi) muscle, following supraorbital nerve stimulation, in 19 patients with blepharospasm, 16 patients with torticollis spasmodica and 22 control subjects. Furthermore, in order to examine the suprasegmental control of the responses, the reflex responses were also evoked in the orbicularis oris (Ooris) muscle after stimulation of the ipsilateral supraorbital nerve. The responses were recorded only when subjects had no contractions of the eyelid muscles, either involuntarily, voluntarily or spontaneously; this could be controlled by a sound signal. The metrics of the reflex responses in the Ooculi and Ooris muscles in patient groups were comparable to those in controls. Our data indicate that the afferent and efferent pathways of the reflex arc and the suprasegmental control of the reflex are intact in patients with blepharospasm and torticollis spasmodica, at least during spasm-free intervals. Alterations of responses may occur during spasms due to either segmental or suprasegmental changes.
J L Eekhof; M Aramideh; J D Speelman; B W Ongerboer de Visser
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European neurology     Volume:  46     ISSN:  0014-3022     ISO Abbreviation:  Eur. Neurol.     Publication Date:  2001  
Date Detail:
Created Date:  2001-08-30     Completed Date:  2001-12-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0150760     Medline TA:  Eur Neurol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  75-8     Citation Subset:  IM    
Copyright Information:
Copyright 2001 S. Karger AG, Basel
Department of Neurology, Academic Medical Centre, Meibergdreef 9, NL-1105 AZ Amsterdam, The Netherlands.
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MeSH Terms
Aged, 80 and over
Blepharospasm / physiopathology*
Blinking / physiology*
Electric Stimulation
Facial Nerve / physiopathology
Functional Laterality / physiology
Middle Aged
Motor Neurons / physiology
Neural Pathways / physiopathology
Orbit / innervation
Pons / physiopathology
Reaction Time / physiology*
Reference Values
Synaptic Transmission / physiology
Torticollis / physiopathology*
Trigeminal Nucleus, Spinal / physiopathology

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