<p>It is known that there is an intraindividual amplitude variation in motor electroneurography when the same person is examined at different times. This variation affects the evaluation the status of the patient. The aim of this study was to investigate if the intraindividual amplitude variation decreased by photographing the electrode position, that later is used in the follow-up study. Twenty test persons were examined by four laboratory scientists. The nerves that were examined were median, ulnar, peroneal and tibial nerve. At the first examination the laboratory scientists used method guidelines and took photographs of the electrode position. The photographs were then used in the follow-up. The results showed that there was an indication of decreased of the intraindividual amplitude variation when photographic documentation was used instead of method guidelines.</p>

It is known that there is an intraindividual amplitude variation in motor electroneurography when the same person is examined at different times. This variation affects the evaluation the status of the patient. The aim of this study was to investigate if the intraindividual amplitude variation decreased by photographing the electrode position, that later is used in the follow-up study. Twenty test persons were examined by four laboratory scientists. The nerves that were examined were median, ulnar, peroneal and tibial nerve. At the first examination the laboratory scientists used method guidelines and took photographs of the electrode position. The photographs were then used in the follow-up. The results showed that there was an indication of decreased of the intraindividual amplitude variation when photographic documentation was used instead of method guidelines.

Neurografi är en grundläggande metod för att diagnosticera perifera nervsjukdomar, metoden reflekterar det funktionella tillståndet av myeliniserade axon. Neurografi är uppdelat i två delar, motorisk och sensorisk neurografi. Vid undersökningen erhålls va-riabler så som amplitud, latenstid och nervledningshastighet, samtliga variabler är på-verkade av vävnadstemperatur. Vid kalla temperaturer sjunker nervledningshastigheten, amplituden förändras och latenstiden förlängs. Syftet med studien är att kartlägga till vilken grad temperaturen påverkar sensorisk neurografi och om motorisk neurografi på-verkas av temperatur. I studien undersöktes den sensoriska och motoriska grenen på n. tibialis vid hudtempe-raturerna &gt; 30° C, mellan 25 – 28° C samt &lt; 24° C. Huden kyldes med vatten och hud-temperaturen mättes med en örontermometer. Sensorisk nervledningshastighet och amplitud visade en signifikant skillnad mellan de tre temperaturintervallerna medan motorisk nervledningshastighet och amplitud inte vi-sade någon signifikant skillnad. / Electroneurography is a fundamental method for diagnosing peripheral nerve disorder, the method reflects the functional condition of the myelin coated axons. Electroneurog-raphy is divided into two parts, sensory and motor neurography. During the examination are variables as amplitude, latency and conduction velocity acquired, all those variables are affected by temperature. At cold temperature conduction velocity declines, ampli-tude changes and latency extend. The purpose of the study is to map out to what degree the temperature is affecting sensory neurography and if motor neurography is affected by temperature. The study examined the sensory and motor branch of n. tibialis at the skin temperature &gt; 30° C, between 25 – 28° C and &lt; 24° C. The skin was cooled by water and the skin temperature was measured by an ear-thermometer. Sensory conduction velocity and amplitude had a significantly difference at the three temperature intervals meanwhile motor conduction velocity and amplitude did not.