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Query: EC:2.3.1.177 (BIS)
 957 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Pain catastrophizing is generally viewed as an important cognitive factor underlying chronic pain. The present study examined personality and temperament correlates of pain catastrophizing in a sample of young adolescents (N = 132). Participants completed the Pain Catastrophizing Scale for Children, as well as scales for measuring sensitivity of the behavioral inhibition and behavioral activation systems (BIS-BAS), and various reactive and regulative temperament traits. Results demonstrated that BIS, reactive temperament traits (fear and anger-frustration), and perceptual sensitivity were positively related to pain catastrophizing, whereas regulative traits (attention control, inhibitory control) were negatively associated with this cognitive factor. Further, regression analyses demonstrated that only BIS and the temperamental traits of fear and perceptual sensitivity accounted for a unique proportion of the variance in adolescents' pain catastrophizing scores.
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PMID:Personality and temperament correlates of pain catastrophizing in young adolescents. 1740 72

The autonomic nervous system (ANS) at the stage of induction was studied in 128 spinal surgical patients with chronic pain syndrome (CPS) (ASA 2-3). In all groups premedication was similar (diazepam 10 mg i.m.), intramuscular and intravenous atropine 0.5 was additionally injected in Groups 3 and 4, respectively. Introductory anesthesia used 4 coinduction modes: thiopental, fentanyl, and propofol (Group 1); propofol and fentanyl (Group 2); propofol, medazolam, and fentanyl (Groups 3 and 4). BIS monitoring was used to evaluate the impact of anesthesia and sedation on the central nervous system; autonomic screening and the Kerdo index were employed for the ANS. Intraoperative circulatory function was controlled by the values of blood pressure, heart rate, stroke index, cardiac index (CI), total peripheral resistance, and double product. Assessment of the time course of changes in ANS tone in patients with CPS indicated that after premedication, the number of parasympathotonics ranged up to 82% and that of normo- and sympathotonics was reduced to 13 and 5%, respectively. During induction with vagotonic agents, ignoring the baseline ANS tone was followed by a progression of the parasympathetic reaction of the circulatory system as a drop of CI to the low values of relevant dissadjustment in the hypokinetic hemodynamic type. There was a transition of ANS tone to physiological sympathicotonia and, accordingly, to the eukinetic circulatory type during coinduction mode 4 that suppressed vagus reflex.
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PMID:[The autonomic nervous system and blood circulation system during different modes of anesthetic coinduction]. 1982 1

38 patients after spinal surgery were involved in the study. Patients were divided into two groups similar by anthropometric factors, pathology and preoperative pain syndrome. The first group included 15 patients older than 60 years (mean age 66 +/- 5.77 years), second group--23 patients younger than 60 years (mean age 43 +/- 10.7 years). The authors analyzed influence of anesthetic method, duration of anesthesia, hemodynamic parameters, BIS values on POCD syndrome. Duration and depth of anesthesia, episodes of hypotension are main predictors of POCD. Maintenance of optimal depth of anesthesia defined by BIS monitoring decreases the frequency of POCD. Patients of all ages with chronic pain syndrome usually have memory and attention disturbances.
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PMID:[Cognitive status assessment after spinal surgery]. 2308 44

The aim of the study was to test the efficacy of pain imagery as a function of hypnotisability and of the activity of Behavioral Inhibition/Activation Systems. Questionnaires of imagery abilities (Betts) for the visual, cutaneous and organic modalities, absorption in cognitive tasks (TAS), proneness to inhibit stressful/painful experience/seek out positive experiences (BIS BAS), trait anxiety (STAI-Y2) and psychological well-being (PWB) were administered to 21 subjects with high hypnotisability (highs) and 21 subjects with low hypnotisability (lows). Self-reports of pain intensity and of neutral tactile perception were collected during imagery of nociceptive (Pain) and neutral tactile stimulation (NT). ECG and skin conductance were recorded. Highs exhibited greater imagery abilities, absorption, Behavioral Inhibition System Activity and psychological well-being with respect to lows. They reported lower scores of pain intensity than of tactile perception, while in lows Pain and NT scores did not differ. However, controlling for BAS, but not for BIS, revealed differences in the efficacy of pain imagery between highs and lows. Heart rate decreased in both tasks and groups; heart rate variability and skin conductance did not change significantly during imageries. Our findings suggest that the Behavioral Inhibition/Activation Systems interact with imagery abilities reducing the efficacy of pain imagery and prompt investigation of possible similar interactions in the modulation of physically induced experimental pain and of chronic pain in the general population.
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PMID:Pain-inducing imagery as a function of hypnotisability and of the activity of Gray's Behavioral Inhibition/Activation Systems. 2403 63