✦ LIBER ✦

Perioral reflexes in orofacial dyskinesia and spasmodic dysphonia

✍ Scribed by Dr. Helge Topka; Dr. Mark Hallett

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 480 KB
Volume: 15
Category: Article
ISSN: 0148-639X
DOI: 10.1002/mus.880150906

No coin nor oath required. For personal study only.

✦ Synopsis

In order to assess the clinical utility of trigemino-facial reflexes in lower facial muscles, we studied perioral reflexes to mechanical and electrical stimulation in 13 patients with spasmodic dysphonia and orofacial dyskinesia and in 7 healthy subjects. Mechanical stimulation of the upper lip of all patients and electrical stimulation of the infraorbital nerve of patients with orofacial dyskinesia elicited larger perioral reflexes than in controls. In the majority of patients, hyperexcitable perioral reflexes were accompanied by increased gain of the blink reflex. In 4 patients, however, trigemino-facial reflexes were enhanced selectively in either the perioral muscles or orbicularis oculi. Our findings suggest that the quantitative assessment of perioral reflexes may provide information about the excitability of brainstem interneurons in cranial dystonia that is complementary to blink reflex studies. @

📜 SIMILAR VOLUMES

Brainstem pathology in spasmodic dysphon

Brainstem pathology in spasmodic dysphonia

✍ Kristina Simonyan; Christy L. Ludlow; Alexander O. Vortmeyer 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 157 KB

## Abstract Spasmodic dysphonia (SD) is a primary focal dystonia of unknown pathophysiology, characterized by involuntary spasms in the laryngeal muscles during speech production. We examined two rare cases of postmortem brainstem tissue from SD patients compared to four controls. In the SD patient

Normalization of voice in spasmodic dysp

Normalization of voice in spasmodic dysphonia during transient global amnesia

✍ Asha Kishore; Anthony E. Lang 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 42 KB

## Abstract We report on the case of a 69‐year‐old woman with Parkinson's disease and long‐standing history of spasmodic dysphonia that reversed during an episode of transient global amnesia (TGA). To our knowledge, this phenomenon has not been reported before. We suggest possible mechanisms by whi

Safety and efficacy of botulinum toxin t

Safety and efficacy of botulinum toxin type B (Myobloc) in adductor spasmodic dysphonia

✍ Charles H. Adler; Stephen F. Bansberg; Kari Krein-Jones; Joseph G. Hentz 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 68 KB

## Abstract This single‐site, open‐label, dose‐finding study evaluated the safety and efficacy of botulinum toxin type B (BoNT‐B; Myobloc) for the treatment of adductor spasmodic dysphonia (AdSD) in 13 patients. Three patients received a total of 50 U (25 U per vocal fold); the same three subsequen

Spasmodic dysphonia in a patient with th

Spasmodic dysphonia in a patient with the A to G transition at nucleotide 8344 in mitochondrial DNA

✍ Ying Peng; Roger Crumley; John M. Ringman 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 57 KB

## Abstract Dystonia has been described in various diseases affecting mitochondrial function but spasmodic dysphonia, a form of focal dystonia, has not. We present a patient with action myoclonus affecting the hands and arms who carried the most common mutation in mitochondrial DNA causing the myoc

Blink reflex studies in focal dystonias:

Blink reflex studies in focal dystonias: Enhanced excitability of brainstem interneurons in cranial dystonia and spasmodic torticollis

✍ Dr. Eduardo Tolosa; Luis Montserrat; Angeles Bayes 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 483 KB