Electrophysiological Study of Bell Palsy: Electrically Elicited Blink Reflex in Assessment of Prognosis

Kimura, Jun; Giron, Louis T.; Young, Samuel

doi:10.1001/archotol.1976.00780080062005

Cited by 69 publications

(29 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Latency of BR is delayed in neurapraxic lesions and absent precociously in recent onset axonotmesis ones. Specificity and sensitivity of this parameter at 5 to 7 days postonset are higher than EMG testing and increases with time . BR shows an accuracy of 90% in predicting residual motor deficit, providing early and reliable information on the degree of axonal block when assessed in the acute and subacute phases …”

Section: Discussionmentioning

confidence: 98%

Prognostic factors of Bell's palsy: Multivariate analysis of electrophysiological findings

et al. 2014

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 98%

Prognostic factors of Bell's palsy: Multivariate analysis of electrophysiological findings

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Kimura et al [9] found that BR is a good prognostic index, in predicting the patients who have a good clinical recovery when it returns before the excitability of the distal segment of the facial nerve is lost. Mizukoshi et al [12] used the difference in amplitude and velocity between right and left eye movement recorded by ENoG after tapping the glabella, calling it blink index (BI).…”

Section: Discussionmentioning

confidence: 99%

“…The normal mean value of R| is around 10 ms and never exceeds 13 ms [8,9], The purpose of this study is to assess and evaluate the usefulness of the BR as a prog nostic indicator in an early stage of the dis ease for patients with acute facial palsy (BP and RHS). The correlation between BR in the first 14 days from onset and the severity of paralysis based on ENoG during the same period was tested.…”

Section: Introductionmentioning

confidence: 99%

Blink Reflex: Prognostic Value in Acute Peripheral Facial Palsy

Ghonim

Gavilán²

1990

ORL

View full text Add to dashboard Cite

The blink reflex (BR) has been studied during the first 2 weeks in 122 patients with Bell’s palsy and Ramsay Hunt’s syndrome. According to early BR (R₁), the patients were divided into 3 groups: R₁ ≤ 13 ms (16 cases); R₁ > 13 ms (54 cases), and absent BR (52 cases). There was a remarkable tendency towards a satisfactory recovery from paralysis if BR occurred during the first 2 weeks from onset (p < 0.001). In patients with normal BR, 93.7% had a satisfactory recovery, and in patients with delayed R1, the prognosis was still good: 86.8% had a satisfactory recovery. When the reflex was absent a bad prognosis was given in 55.8% of the patients. The BR and the severity of the lesions according to electroneurograms was tested in 111 patients and found to be significantly correlated (p < 0.001). BR seems to be a useful index for predicting the prognosis in an early stage of the paralysis, however, more than one test should be performed at the same time to accurately establish the prognosis.

show abstract

“…It may suggest the nature of the underlying pathological process, provide cues for a prognosis, and furnish the bases for pathophysiological explanations of related abnormalities of movement control. In the first few days, electrically induced blink reflexes25 or the assessment of transpetrossal facial nerve conduction time26, 27 provide information on the degree of axonal conduction block. At approximately 10 days from onset of symptoms, calculating the relative loss of amplitude of the compound muscle action potential elicited by electrical stimulation of the nerve at the tragus in the nasalis, the orbicularis oculi (OOc), or the orbicularis oris (OOr) muscles of the paralyzed side with respect to those of the nonparalyzed side provides the most accurate predictive test for the degree of axonal damage.…”

Section: Known Causes Of Facial Palsymentioning

confidence: 99%

Movement disorders in patients with peripheral facial palsy

Valls‐Solé

Montero

2003

Movement Disorders

View full text Add to dashboard Cite

Acute unilateral facial paralysis is usually a benign neurological condition that resolves in a few weeks. However, it can also be the source of a transient or long-lasting severe motor dysfunction, featuring disorders of automatic and voluntary movement. This review is organized according to the two most easily recognizable phases in the evolution of facial paralysis: (1). Just after presentation of facial palsy, patients may exhibit an increase in their spontaneous blinking rate as well as a sustained low-level contraction of the muscles of the nonparalyzed side, occasionally leading to blepharospasm-like muscle activity. This finding may be due to an increase in the excitability of facial motoneurons and brainstem interneurons mediating trigeminofacial reflexes. (2). If axonal damage has occurred, axonal regeneration beginning at approximately 3 months after the lesion leads inevitably to clinically evident or subclinical hyperactivity of the previously paralyzed hemifacial muscles. The full-blown postparalytic facial syndrome consists of synkinesis, myokymia, and unwanted hemifacial mass contractions accompanying normal facial movements. The syndrome has probably multiple pathophysiological mechanisms, including abnormal axonal branching after aberrant axonal regeneration and enhanced facial motoneuronal excitability. Although the syndrome is relieved with local injections of botulinum toxin, fear of such uncomfortable contractions may lead the patients to avoid certain facial movements, with the implications that this behavior might have on their emotional expressions.

show abstract

Electrophysiological Study of Bell Palsy: Electrically Elicited Blink Reflex in Assessment of Prognosis

Cited by 69 publications

References 12 publications

Prognostic factors of Bell's palsy: Multivariate analysis of electrophysiological findings

Prognostic factors of Bell's palsy: Multivariate analysis of electrophysiological findings

Blink Reflex: Prognostic Value in Acute Peripheral Facial Palsy

Movement disorders in patients with peripheral facial palsy

Contact Info

Product

Resources

About