The baseline transcephalic D.C. potential in normals
| Autor: | Murray A. Cowen |
|---|---|
| Rok vydání: | 1967 |
| Předmět: |
Adult
Male medicine.medical_specialty Time Factors Adolescent Intelligence Urination Anxiety Stimulus (physiology) Audiology Projective Techniques Waiting period Developmental psychology Nicotine Mental Processes Orientation Hypersensitivity medicine Humans Nutritional Physiological Phenomena Defecation Biological Psychiatry Inhalation Smoking Age Factors Brain Middle Aged Electrophysiology Psychiatry and Mental health medicine.symptom Psychology medicine.drug |
| Zdroj: | Journal of Psychiatric Research. 5:307-315 |
| ISSN: | 0022-3956 |
| DOI: | 10.1016/0022-3956(67)90019-2 |
| Popis: | This study, employing six groups of non-psychotic, unmedicated male subjects, ranging from six to sixty in number in each group, replicates and expands on previous work concerning the effects of a number of variables on the initial baseline transcephalic d.c. potential (IP) and the baseline d.c. shift (δP) after a 10-min test period involving the subjects in performing mental tasks. In agreement with prior studies, the range of IP was found to be from -25·0 to + 30·0 mV and appears to be unaffected by age or intelligence. Anxiety increases the variance of the group tested. Subjects tend to be most negative around 3:00 p.m. to 5:00 p.m. and 2–3 hr after eating. Heavy eaters show a decreased -δP in response to novel stimuli, faecal retainers show a more positive IP and a more negative δP, and mild urinary retention increases the variance of the IP. Subjects with an allergic history show a general increase of both negative IP and δP. A 20-min waiting period abolishes any effect of nicotine inhalation. The greatest stimulus to promote a -δP is one requiring the subject to develop a new and complex orientation in order to respond to a task. |
| Databáze: | OpenAIRE |
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