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Autonomic cardiovascular dysregulation at rest and during stress in chronically low blood pressure.
Chronic low blood pressure (hypotension) is accompanied by symptoms such as fatigue, reduced drive, faintness, dizziness, cold limbs, and concentration difficulties. The study explored the involvement of aberrances in autonomic cardiovascular control in the origin of this condition. In 40 hypotensive and 40 normotensive subjects, impedance cardiography, electrocardiography, and continuous blood pressure recordings were performed at rest and during stress induced by mental calculation. Parameters of cardiac sympathetic control (i.e., stroke volume, cardiac output, pre-ejection period, total peripheral resistance), parasympa...
Source: Journal of Psychophysiology - November 27, 2017 Category: Psychiatry & Psychology Source Type: research

Distinct mechanisms and timing of language recovery after stroke.
Abstract The "language network" is remarkably stable across language tasks but changes in response to injury to specific components or in response to "disconnection" of input to one component. We investigated network changes during language recovery, hypothesizing that language recovery takes place through distinct mechanisms: (a) reperfusion; (b) recovery from diaschisis; (c) recovery from structural disconnection; and (d) "reorganization" of language, whereby various components assume function of a damaged component. We also tested the hypothesis that "reorganization" depends on: the language task, level of perf...
Source: Cognitive Neuropsychology - January 28, 2014 Category: Psychiatry & Psychology Authors: Jarso S, Li M, Faria A, Davis C, Leigh R, Sebastian R, Tsapkini K, Mori S, Hillis AE Tags: Cogn Neuropsychol Source Type: research