| F-waves and facilitated late responses of the mentalis muscle in patients with a cerebrovascular accident. | |
| | |
MedLine Citation:
|
PMID: 11045019 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
F-waves in the extremities result from the backfiring of antidromically activated anterior horn cells and F-waves of the mentalis muscle can be also elicited after stimulation of the marginal mandibular branch of the facial nerve. In order to investigate the influence of the descending pathway of the excitability of the facial motonucleus, the F-wave of the mentalis muscle and the facilitated late response, which follows F-waves and which seems to be the snout reflex due to their similar latency and habituation, were studied in 11 conscious patients with a hemispheric cerebrovascular accident (CVA) presenting with hemiparesis, and in 10 unconscious patients with CVA or head injury. The duration and the persistence of the F-waves increased significantly statistically on the normal side in the CVA patients compared with those of the palsy side and the normal subjects. In comatose patients the F-waves and the facilitated late response were not elicited. The latency (46.1 +/- 13.3 msec) of the facilitated late responses in the unconscious patients tended to increase compared with the latency (36.6 +/- 4.3 msec) in the conscious patients. These findings suggest that the hyperexcitability of the facial motoneuron is ipsilateral to any hemispheric lesion; the hemispheric lesion exerts a bilateral excitatory influence on the interneuron of the facilitated late response: and that the reticular formation may influence the facial motoneuron and any interneurons concerned in the facilitated late response. F-waves and facilitated late responses should be further examined as neurophysiologically useful diagnostic methods. |
| | |
Authors:
|
M Ishikawa; J Namiki; M Takase; T Kawase |
Related Documents
:
|
7431029 - Somatosensory conduction times and peripheral, cervical and cortical evoked potentials ... 21887679 - A phase 2 randomized multicenter study of 2 extended dosing schedules of oral ezatiosta... 17924529 - A developmental classification of malformations of the brainstem. 19342539 - Cerebellar atrophy in essential tremor using an automated segmentation method. 6652939 - Bser abnormalities in patients with spino-cerebellar degeneration. 7748359 - Median nerve somatosensory evoked potentials in children receiving ecmo. 12136899 - Functional impairment in spondyloarthropathy and fibromyalgia. 8504589 - Anterior dislocation of the shoulder and rotator cuff rupture. 21172289 - Does the endoscopic appearance of the ileocecal valve suggest the severity of crohn's d... |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Neurological research Volume: 22 ISSN: 0161-6412 ISO Abbreviation: Neurol. Res. Publication Date: 2000 Sep |
Date Detail:
|
Created Date: 2001-02-06 Completed Date: 2001-02-08 Revised Date: 2007-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 7905298 Medline TA: Neurol Res Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 576-82 Citation Subset: IM |
Affiliation:
|
Department of Neurosurgery, Saitama National Hospital, Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Consciousness Disorders
/
physiopathology Craniocerebral Trauma / physiopathology Electromyography / methods Facial Muscles / physiopathology* Functional Laterality Humans Paresis / physiopathology Reaction Time Stroke / physiopathology* Unconsciousness / etiology, physiopathology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Microsatellite instability in primary brain tumors.
Next Document: Spontaneous disappearance and reappearance of a ruptured cerebral aneurysm: one case found in a grou...