Related Experiment Video
Updated: Jun 17, 2026
Facial Nerve Axotomy in Mice: A Model to Study Motoneuron Response to Injury
Published on: February 23, 2015
[Clinical-electroneuromyographical characteristics of facial nerve paralysis in children]
1Kafedra nevrologii i psikhiatrii fakul'teta povysheniia kvalifikatsii Smolenskoĭ gosudarstvennoĭ meditsinskoĭ akademii.
Insights
Pediatric facial nerve paralysis (FNP) involves proximal axon and myelin damage, affecting motor neurons. Early indicators like absent wink reflex and F-wave blocks suggest poor recovery of mimic muscle function.
Area of Science:
- Pediatric Neurology
- Clinical Electrophysiology
- Neuroscience
Background:
- Facial nerve paralysis (FNP) in children is a significant neurological concern.
- Understanding the underlying pathophysiology is crucial for effective management.
- Previous studies have not fully elucidated the electrophysiological characteristics in the acute phase of pediatric FNP.
Purpose of the Study:
- To investigate the clinical and electrophysiological features of acute facial nerve paralysis in children.
- To identify potential prognostic factors for facial muscle function recovery.
Main Methods:
- A clinical-electroneuromyographical study was conducted on 40 children with acute FNP.
- Electroneuromyographical analysis included motor responses to facial nerve stimulation.
- Assessment of muscle paresis and comparison with control groups were performed.
Main Results:
- The study revealed proximal axonopathy and myelinopathy of the facial nerve, involving motor neurons and brainstem interneurons.
- Muscle paresis was significant, corresponding to clinical stages III-IV.
- Unfavorable prognostic factors identified include the persistence of wink reflex and F-wave blocks beyond three weeks.
Conclusions:
- Pediatric FNP in the acute phase is characterized by proximal nerve involvement and potential central nervous system implications.
- The presence of specific electrophysiological findings, such as F-wave blocks, can predict long-term functional outcomes.
- Early identification of these prognostic markers can guide therapeutic strategies and patient counseling.
Abstract:
A clinical-electroneuromyographical study of 40 children (32 (80%) of them aged from 12 to 17 years, mean age 13,9+/-1,8 years, and 8 (20%) - from 1 to 8 years, mean age 4,4+/-2,1 years) were studied in the acute period of facial nerve paralysis (FNP). Six (15%) children had FNP in the anamnesis. Among precipitating factors were the cold exposure the day before disease onset (20 (50%) patients), symptoms of flu (13 (32,5%) patients) and psycho-emotional tension (3 (7,5%) patients). No precipitation was noted in 4 (10%) children. The degree of muscle paresis was 81,9+/-7% that corresponded to clinical stages III-IV according to K. Rosler. An electroneuromyographical analysis of motor ortho- and antidromic response to the facial nerve stimulation on the side of paresis and on the contralateral side in patients and controls revealed the presence of proximal axon- and myelinopathy of facial nerve with the involvement of its own motorneurons and brain stem interneurons. The maintenance of wink reflex and F-wave blocks in the period over 3 weeks are prognostically unfavorable factors for restoration of mimic muscle function in the early stage of disease.
Related Concept Videos
01:24Local Anesthetics: Differential Sensitivity of Nerve Fibers
01:14Cranial Nerves: Types Part I
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...