Impact of temperature on nerve conduction velocity
Journal Title: Journal of Neurological Sciences-Turkish - Year 2005, Vol 22, Issue 1
Abstract
Background: Heat is one of the most important factors affecting the nerve conduction studies. Skin temperature affects nerve conduction velocity, distal latency and wave morphology. Cold is more effective on wide myelinated nerve fibers than on small nerve fibers. Whereas distal latency extends 0,2 millisecond for the temperature decrease of each degree, conduction velocity in motor and sensory conduction studies slows down 1,5 to 2,5 m/s for the environmental temperature decrease of each degree. Material and Methods: In this study we evaluated the patients appealing to our Electromyography Laboratory in January (n = 210) when the environmental temperature was the lowest and in July (n = 136) when the environmental temperature was the highest. Motor and sensory nerves conduction studies were performed in upper and lower extremities in all subjects. Results: When all of the cases were analyzed it was seen that mean latencies in January were longer than mean latencies in July. It was seen that mean conduction velocities obtained in January were longer than mean conduction velocities obtained in July, especially in sensory conduction. In contrast, it was seen that mean amplitudes obtained in January were greater than the mean amplitudes obtained in July. Distal latencies, conduction velocities and amplitude values in January and July were compared in the patients diagnosed as polyneuropathy and carpal tunnel syndrome (CTS). Of the patients examined the number of those diagnosed as CTS is very high in January when compared to that in July (%36.7 and %26.3). Conclusion: As a result of our study ıt was seen that latency had shortened, conduction velocity had extended and amplitude values had lowered with elevated temperature.
Authors and Affiliations
Aysın KISABAY, Sehnaz ARICI, Ceyla ATAC, Aysegul KARATEPE, Burhanettin ULUDAG
Keywords
Related Articles
- EP ID EP118522
- DOI -
- Views 391
- Downloads 0
Lokal Anestezi ile Anahtar Deliği Tümör Eksizyonu
Amaç: Hassas beyin alanlarında yerleşmişolan tumörlerin cerrahisi yüksek risk taşır. Biz yeni defisitlerin oluşumunu engellemek için bu lezyonları lokal anestezi ile çıkardık. Metod: lokal anestezi ile stereotaktik yönl...
Migrenli Kadın Hastalarda Atak Sırasında ve Ataklar Arası Dönemde Seks Hormon Düzeyleri
Amaç: auralı ve aurasız migren tanısı almış kadın hastalarda, migren atağı sırasında ve ataklar arası dönemde serum östrojen, progesteron, folikül stimülan hormon, luteinizan hormon ve prolaktin hormon düzeyleri ile baş...
Sarcoidosis: A Cause For Bilateral Facial Palsy
Sarcoidosis is a systemic, chronic, granulomatous disease and it mainly affects lung. Bilateral facial nerve involvoment due to occult sarcoidosis is an extremely rare phenomenon that can be the presenting complaint in a...
Obstruktif Uyku Apne Sendromlu Hastalarda Etkili CPAP Seviyesinin Önceden Belirlenmesi
Giriş: Obstruktif uyku apne sendromlu (OUAS) hastalarda uygun CPAP seviyesini titrasyon öncesinde öngermek, titrasyon işlemini kolaylaştırmak ve etkinliğini arttırmak açısından önemlidir. Bu çalışmanın iki amacı bulunma...
Succinic Semialdehyde Dehydrogenase Deficiency : Three Sibling in A Family (Case Report)
Succinic semialdehyde dehydrogenase enzyme (SSADH) deficiency is a rare autosomal disorder involving the catabolism of the neurotransmitter γ-amino butyric acid (GABA). In the absence of SSADH, GABA is converted to 4-hyd...