 |
|
Cerebral Responsiveness in Psychiatric PatientsIntensity-Response Gradients and Recovery Cycles of Somato sensory Evoked Potentials
CHARLES SHAGASS, M.D.;
MARVIN SCHWARTZ, Ph.D.
Arch Gen Psychiatry. 1963;8(2):177-189.
|
|
| Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings. |
|
|
|
Measurement of the electrical potentials evoked at the cortex in response to sensory stimulation offers a direct means of studying some aspects of cerebral responsiveness in man. Although not visible in the usual human electroencephalogram (EEG), these potentials may be recorded from the scalp by averaging procedures.2 We have previously reported the results of studies in which the recovery, or reactivity, cycle of somatosensory responses was compared in normal and psychiatric populations.11,12 The recovery cycle is determined by administering pairs of stimuli, separated by varying intervals. The relative size of the second, compared to the first, response of a pair indicates the extent to which the system has recovered its capacity to respond after a given interval.
In nonpatient control subjects, there was usually an initial phase of full recovery, which occurred within 20 milliseconds. The main difference between controls and psychiatric patients was
. . . [Full Text PDF of this Article]
Author Affiliations
IOWA CITY
Professor (Dr. Shagass) and Research Assistant Professor (Dr. Schwartz), Department of Psychiatry, College of Medicine, and Psychopathic Hospital, State University of Iowa.
Footnotes
Submitted for publication March 21, 1961.
Supported (in part) by grants from the National Institute of Mental Health (MY-2635) and the Iowa Mental Health Research Fund.
 CiteULike  Connotea  Del.icio.us  Digg  Reddit  Technorati  Twitter
What's this?
|
