AAEM minimonograph #14: The influence of temperature in clinical neurophysiology

Denys, Eric H.

doi:10.1002/mus.880140902

Cited by 183 publications

(90 citation statements)

References 86 publications

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“…Whereas studies in other sensory nerves observed a decrease in the SCV 18,[22][23][24] , an increase in the SDL 18,25,26 , and an increase in the SNAP amplitude 24,27 when the temperature is reduced. Our findings of absence of effects of temperature on the DUC nerve conduction are probably the result of narrow temperature variation allowed during the entire test as part of our method of investigation.…”

Section: Discussionmentioning

confidence: 79%

Dorsal ulnar cutaneous nerve conduction: reference values

Garibaldi

Nucci

2002

Arq. Neuro-Psiquiatr.

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-We investigated the reference values of the dorsal ulnar cutaneous nerve (DUC) sensory nerve conduction (SNC) in 66 healthy individuals. Measurements were processed using stimulating electrodes positioned between the ulnar bone and the flexor carpi ulnaris muscle, 11-13 cm proximal to the active electrode recording. Superficial recording electrodes were placed on the fourth intermetacarpal space. The mean sensory conduction velocity (SCV) in males was 63.7 -0.16 x age ± 3.36 m/s and in females was 57.7 ± 3.37 m/s. The mean sensory nerve action potential (SNAP) amplitude in males was 19.5 ± 10.7 µV and in females was 24.6 ± 5.8 µV. The mean SNAP duration was 0.96 ± 0.13 ms. No significant differences regarding the DUC-SCV, distal latency, and SNAP duration or amplitude were found between both sides of the same subject. The amplitude of the SNAP was higher in females than males. The effects of age on DUC-SCV were distinct for each gender.KEY WORDS: dorsal ulnar cutaneous nerve, nerve conduction, reference values, age, height, sex, temperature.Condução nervosa do nervo cutâneo ulnar dorsal: valores de referência Condução nervosa do nervo cutâneo ulnar dorsal: valores de referência Condução nervosa do nervo cutâneo ulnar dorsal: valores de referência Condução nervosa do nervo cutâneo ulnar dorsal: valores de referência Condução nervosa do nervo cutâneo ulnar dorsal: valores de referência RESUMO -Investigamos os valores de referência da condução nervosa sensitiva do nervo cutâneo ulnar dorsal em 66 indivíduos normais, por técnica de condução nervosa antidrômica. A velocidade de condução sensitiva (VCS) média, em homens foi 63,7 -0,16 x idade ± 3,36 m/s e nas mulheres 57,7 ± 3,37 m/s. A amplitude média do potencial de ação nervoso sensitivo (PANS) em homens foi 19,5 ± 10,7 µV e nas mulheres foi 24,6 ± 5,8 µV. A duração média do PANS foi 0,96 ± 0,13 ms. A dominância manual não interferiu nos valores da VCS, latência distal, amplitude e duração do PANS. Nas mulheres a amplitude do PANS foi maior do que nos homens. Os efeitos da idade na VCS foram distintos para cada sexo. PALAVRAS-CHAVE: nervo cutâneo ulnar dorsal, condução nervosa, valores de referência, altura, idade, sexo, temperatura.The dorsal ulnar cutaneous nerve (DUC), a branch of the ulnar nerve, leaves the main ulnar trunk approximately at the junction of the medial and distal thirds of the forearm 1 , then it takes a dorsal position at the wrist and continues on the dorsomedial region of the hand 2 . The purposes of studying the DUC sensory nerve conduction (SNC) include distinction between proximal and distal ulnar nerve lesions 3-5 , identification of isolated lesions of this nerve branch 5,6 , and investigation of the dorsomedial hand innervation 6,7 .The DUC is vulnerable to laceration, blunt trauma, and compression injury due to its superficial position 8 . In addition, determination of the DUC-SNC is helpful to confirm or rule out proximal lesions of the ulnar nerve. Lesions of the ulnar nerve at the level of the elbow and wrist are highly fre...

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Section: Discussionmentioning

confidence: 79%

Dorsal ulnar cutaneous nerve conduction: reference values

Garibaldi

Nucci

2002

Arq. Neuro-Psiquiatr.

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“…The hand temperatures still ranged, however, between 29.0 and 36.2"C (mean 33.3"C) for the dominant hands and between 29.0 and 36.0°C (mean 33.2"C) for the nondominant hands. The influence of hand temperature on the absolute electrophysiological results is well known (26). In this study, however, relative electrophysiological findings (the difference between the ipsilateral median and ulnar sensory peak latencies) were examined rather than absolute values.…”

Section: Methodsmentioning

confidence: 99%

Agreement between symptom surveys, physical examination procedures and electrodiagnostic findings for the carpal tunnel syndrome

Homan

Franzblau

Werner

et al. 1999

Scand J Work Environ Health

104

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“…Temperature is one of the most important factors influencing nerve conduction parameters [8][9][10][11][12] . L a t e n c y, amplitude, duration and area of the sensory nerve and compound muscle action potentials increase as the temperature falls.…”

Section: Influence Of Temperature On Comparative Nerve Conduction Tecmentioning

confidence: 99%

Influence of temperature on comparative nerve conduction techniques for carpal tunnel syndrome diagnosis

Kouyoumdjian

Ribeiro

Grassi

et al. 2005

Arq. Neuro-Psiquiatr.

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In this study we compared the effect of temperature variation (>32ºC to <27ºC) on latency differences median to ulnar (ringdiff), median to radial (thumbdiff), palmar median to ulnar (palmdiff) and the sum of three, the combined sensory index (CSI), in 15 controls and 12 patients with carpal tunnel syndrome (CTS). After cooling, ringdiff was the most reliable technique with little variation in both controls and patients; thumbdiff decreased dramatically in controls and could even come within normal limits in patients; palmdiff increased only in patients; CSI decreased significantly in controls and showed a slight increase in patients with no loss in electrodiagnosis accuracy. The high increase of palmdiff in patients, and the high decrease of thumbdiff in controls, after cooling, could not be explained only for fiber size in the nerve trunks. We concluded that for CTS electrodiagnosis even latency differences in same person/same limb could be significantly modified after cooling not previously emphasized in literature.

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AAEM minimonograph #14: The influence of temperature in clinical neurophysiology

Cited by 183 publications

References 86 publications

Dorsal ulnar cutaneous nerve conduction: reference values

Dorsal ulnar cutaneous nerve conduction: reference values

Agreement between symptom surveys, physical examination procedures and electrodiagnostic findings for the carpal tunnel syndrome

Influence of temperature on comparative nerve conduction techniques for carpal tunnel syndrome diagnosis

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