Origin of the facial long latency responses elicited by magnetic stimulation

Electroencephalography and Clinical Neurophysiology
I Rimpiläinen

Abstract

With magnetic stimulation (MS) it is possible to elicit bilateral long latency facial motor responses (LLRs). Due to a relatively wide magnetic field, the site of neural activation may take place in many different structures. The purpose of this study was to determine the site of origin of facial LLRs. The motor long latency responses were recorded bilaterally on the naso-labial folds (NLFs) with reference electrodes on the nose, and on some subjects also with reference electrodes on the chin. The stimulating coil was placed in the right parietal area. LLRs obtained with MS were compared to LLRs elicited electrically at the right stylomastoid foramen, supraorbital foramen, as well as cutaneous sensory area V1 of the trigeminal nerve. In addition, right sided high intensity electrical stimuli, paired magnetic stimulation and electrical stimulation with interstimulus intervals ranging from 0 to 80 msec were also applied for comparison. LLRs recorded with reference to the nose were always elicitable with MS as well as with the other stimulation procedures. The responses elicited with MS did not differ from those elicited electrically at various extracranial stimulation sites. With paired stimuli the second LLRs were inhibited by t...Continue Reading

References

Oct 1, 1988·Electroencephalography and Clinical Neurophysiology·P J MaccabeeB J Anziska
Oct 1, 1989·Journal of Neurology, Neurosurgery, and Psychiatry·K M RöslerU D Schmid
Jan 1, 1988·Journal of Neurology, Neurosurgery, and Psychiatry·T N SchrieferC W Hess
May 1, 1993·Acta Oto-laryngologica·I RimpiläinenP Karma

❮ Previous
Next ❯

Citations

Jul 13, 1999·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·H R SiebnerB Conrad
Jan 1, 1996·Scandinavian Audiology·J StarckT Esko

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cajal Bodies & Gems

Cajal bodies or coiled bodies are dense foci of coilin protein. Gemini of Cajal bodies, or gems, are microscopically similar to Cajal bodies. It is believed that Cajal bodies play important roles in RNA processing while gems assist the Cajal bodies. Find the latest research on Cajal bodies and gems here.