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Somatosensory Evoked Responses in Carbon Monoxide Poisoned Subjects (1): Application of Amplitude Scaling
Author(s) -
IKUTA Takumi
Publication year - 1971
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1111/j.1440-1819.1971.tb02914.x
Subject(s) - coincidence , graduation (instrument) , audiology , psychology , discriminant function analysis , somatosensory evoked potential , somatosensory system , medicine , mathematics , statistics , neuroscience , pathology , geometry , alternative medicine
SUMMARY1 With 87 CO‐poisoned subjects of coal miners, the differences in the IPA‐SER Pattern (Inter‐Personal Average Somatosensory Evoked Response Pattern) between the severe and mild cases were studied. Then the severe and mild cases were discriminated by their SER pattern according to the values of Discriminant Function, and the rate of coincidence of the discrimination with the clinical graduation of the individual subjects was obtained.1) In the IPA‐SER Pattern, the latencies of P 3 and N 4 were larger with the severe cases than with the mild cases. 2) The rate of coincidence of the discrimination by SER pattern with the clinical graduation of the individual subjects was 58.6% in all.2 Applying the newly adopted technique, Amplitude Scaling, in which the different amplitudes of each individual SER patterns were scaled into percentages in order to eliminate the individual differences in amplitude, the differences in the Scaled IPA‐SER Pattern between the sever and mild cases were studied. Then the severe and mild cases were discriminated by their Scaled SER Pattern according to the values of Discriminant Function, and the rate of coincidence of the discrimination with the clinical graduation of the individual subjects was obtained.1) In the Scaled IPA‐SER Pattern, the latencies of P 1 , N 3 , P 3 and N 4 were larger with the severe cases than those with the mild cases. 2) The rate of coincidence of the discrimination by Scaled SER Pattern with the clinical graduation of the individual subjects attained to 71.3% in all.