Averaged Somatosensory Evoked Responses in Various Psychiatric Disorders

  • Charles Shagass


Earlier studies comparing somatosensory-response characteristics of psychiatric patients with those of healthy subjects yielded two main positive findings. Amplitude of the “primary” response was greater [1, 2], and its recovery function was attenuated in certain kinds of patients [3–5]. These studies did not adequately take into account several factors later shown to be important, i.e., age, sex, and certain requirements for mathematical treatment of recovery-function data. Observations were also restricted to the “primary” components, and only amplitude was evaluated; latency was not considered. The present study was carried out in order to check the validity of previous findings with all available methodological controls, and to extend the observations to include later evoked-response events and latency measures.


Personality Disorder Psychiatric Patient Interstimulus Interval Inter Stimulus Interval Recovery Curve 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Shagass, C., and Schwartz, M.: Cerebral responsiveness in psychiatric patients, A.M.A. Arch. Gen. Psychiat. 8:177, 1963.CrossRefGoogle Scholar
  2. 2.
    Shagass, C., and Schwartz, M.: Psychiatric disorder and deviant cerebral responsiveness to sensory stimulation, in: Wortis, J. (ed.), Recent Advances in Biological Psychiatry, Vol. V, Plenum Press, New York, 1963, p. 321.Google Scholar
  3. 3.
    Shagass, C., and Schwartz, M.: Cortical excitability in psychiatric disorder. Preliminary results, Proc. III World Congress Psychiat., Vol. 1, University of Toronto Press, 1961, p. 441.Google Scholar
  4. 4.
    Shagass, C., and Schwartz, M.: Excitability of the cerebral cortex in psychiatric disorders, in: Roessler, R., and Greenfield, N.S. (eds.). Physiological Correlates of Psychological Disorder, University of Wisconsin Press, Madison, 1962, p. 45.Google Scholar
  5. 5.
    Shagass, C., and Schwartz, M.: Psychiatric correlates of evoked cerebral cortical potentials. Am. J. Psychiat. 119:1055, 1963.PubMedGoogle Scholar
  6. 6.
    Shagass, C., and Schwartz, M.: Somatosensory cerebral evoked response in psychotic depression, Brit. J. Psychiat. 112:799, 1966.PubMedCrossRefGoogle Scholar
  7. 7.
    Shagass, C: Cerebral evoked response findings in schizophrenia, Proc. IV World Congress of Psychiatry, Madrid, 1966 (in press).Google Scholar
  8. 8.
    Straumanis, J. J., Shagass, C., and Schwartz, M.: Visually evoked cerebral response changes associated with chronic brain syndromes and aging, J. Gerontol. 20:498, 1965.PubMedGoogle Scholar
  9. 9.
    Schwartz, M., Emde, J.,andShagass,C: Comparison of constant current and constant voltage stimulators for scalp-recorded somatosensory responses, EEG Clin. Neurophysiol. 17:81, 1964.Google Scholar
  10. 10.
    Lindquist, E.F.: Design and Analysis of Experiments in Psychology and Education, Houghton-Mifflin, Boston, 1953.Google Scholar
  11. 11.
    Speck, L.B., Dim, B., and Mercer, M.: Visual evoked responses of psychiatric patients, Arch. Gen. Psychiat. 15:59, 1966.PubMedCrossRefGoogle Scholar
  12. 12.
    Floris, V., Morocutti, C., Bernard, G., Amabile, G., Rizzo, P.A., Sommer-Smith, J.A., and Vasconetto, C: Cortical recovery cycle modifications in schizophrenics and dysthymic patients. Symposium on Use of Electronic Devices in Psychiatry, IV World Congress of Psychiatry, Madrid, 1966.Google Scholar
  13. 13.
    Shagass, C., and Schwartz, M.: Age, personality and somatosensory cerebral evoked responses, Science 148:1359, 1965.PubMedCrossRefGoogle Scholar
  14. 14.
    Witkin, H.A., Lewis, H.B., Hertzman, M., Machover, K., Meissner, P.B., and Wapner, S.: Personality through Perception, Harper, New York, 1954.Google Scholar
  15. 15.
    Pascal, G.R., and Suttell, B.J.: The Bender-Gestalt Test: Quantification and Validity for Adults, Grune and Stratton, New York, 1951.Google Scholar
  16. 16.
    Shagass, C., and Canter, A.: Some personality correlates of cerebral evoked response characteristics, Proc. XVIII Intern. Congr. of Psychology, Symposium No. 6, Moscow, 1966, p. 47.Google Scholar
  17. 17.
    Rodin, E.A., Grisell, J.L., Gudobba, R.D., and Zachary, G.: Relationship of EEG background rhythms to photic evoked responses, EEG Clin. Neurophysiol. 19:301, 1965.CrossRefGoogle Scholar
  18. 18.
    Levonian, E.: Evoked potential in relation to subsequent alpha frequency, Science 152:1280, 1966.PubMedCrossRefGoogle Scholar
  19. 19.
    Eccles, J.C.: The Physiology of Synapses, Academic Press, New York, 1964.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1968

Authors and Affiliations

  • Charles Shagass

There are no affiliations available

Personalised recommendations