[Polygraphic studies of newborn infants at risk using acoustic stimulation close to and above the threshold level].
16 newborns were investigated by means of polygraphy (EEG, respirography, heart rate, psychogalvanic reflex and behavioural observations). They were acoustically stimulated (125, 750, 15000 and 3000 Hz, with stepwise increase of the intensity by 10 dBA) during the period of quiet sleep. Partial vegetative reactions appeared in 11 newborns between a stimulation intensity of 30 to 50 dBA. Changes of breathing were initially observed. A further increase of intensity caused reactions in heart rate, psychogalvanic reflex and also body movements. The EEG and behavioural states were never changed at this level of intensity. Reactions in these parameters were recurrently observable if stimulation intensity was higher than 80 dBA. Only half of all stimulations were followed by reactions. The results verify decreased threshold intensity to evoke partial vegetative reactions in newborns at risk and the same sequence of additional reactions in EEG and behavioural states as in healthy newborns following increasing stimulation intensity.
Eiselt
M
M
Institut für Pathologische Physiologie der Kinderklinik der Friedrich Schiller Universität Jena.
Zwiener
U
U
Wranek
U
U
Rother
M
M
Gross
M
M
Heinz
P
P
D000161:Acoustic Stimulation; D001341:Autonomic Nervous System / Q000502:physiology*; D002652:Child Behavior / Q000502:physiology; D004569:Electroencephalography; D005712:Galvanic Skin Response / Q000502:physiology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology*; D009068:Movement / Q000502:physiology; D012119:Respiration / Q000502:physiology
Polygraphische Untersuchungen von Risikoneugeborenen bei schwellennaher und überschwelliger akustischer Reizung.