| Author/Editor | Šibanc, B | |
| Title | Elektrofiziološke značilnosti kožnega odziva pri zdravih ljudeh | |
| Type | monografija | |
| Place | Ljubljana | |
| Publisher | Medicinska fakulteta | |
| Publication year | 1991 | |
| Volume | str. 64 | |
| Language | slo | |
| Abstract | Electrophysiologic characteristics of sympathetic skin response (SSR) were studied. SSR is defined as a minute change of palmar and plantar electric potential. Historical development of methods to study electrodermal phenomena is described. A hypothetical origin of SSR is shown on a model of sodium ion reabsorption in a sweat gland duct. The aim of this study was to define limits of normal SSR values in the local population. They were collected in 40 healthy volunteers, separated into 2 age groups. Latencies and amplitudes of individual SSR components, as well as the area were measured. Influences of different filter settings on the recording equipment, sizes and placements of surface cup electrodes, and different stimulation techniques on the SSR were also studied. SSRs were recorded in all subjects, regardless of age, on all the four limbs and with all stimulation procedures used. Tap to the patellar tendon sufficient to evoke a knee jerk was equally effective in eliciting the SSR as the electrical stimulus, and produced equally slow habituation. Tapping at other sites was much less effective. Four different morphological types of SSR are described. SSR latency was not a sensitive parameter and did not change with age. Palmar latencies were always shorter than plantar ones, and they correlated with the length of the limbs (p less th. 0,005). The latency was influenced by the change of recording site and not by the change of stimulation site. Palmar SSR amplitudes were always higher than plantar ones, and they both show an age-related decay. SSR amplitudes and areas were smaller with full urinary bladder and greatly depended on limb temperature. Stronger stimulation produced higher SSR amplitudes and shorter SSR latencies. Different influence of habituation on individual SSR components was noticed - the P wave of SSR habituated more rapidly than other components. Habituation could be avoided with the interstimulus intervals longer than 15 s.(trunc.) | |
| Descriptors | SWEAT GLANDS ELECTRIC STIMULATION ELECTRIC CONDUCTIVITY ACTION POTENTIALS SWEATING SYMPATHETIC NERVOUS SYSTEM ELECTROMYOGRAPHY HAND LEG AGE FACTORS SKIN TEMPERATURE MEDIAN NERVE PERONEAL NERVE SURAL NERVE |