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Abstract. Although band and spot electrodes have been compared in prior research, they have not been evaluated (a) at identical anatomical locations, (b) during a single laboratory session, (c) with measures taken in close temporal proximity, (d) using a single impedance cardiograph unit, or (e) using sufficiently powerful statistical tests. Thirty-one healthy young adults completed a psychophysiological assessment which consisted of baseline, mental arithmetic stressor, and recovery conditions. Data from spot and band electrodes were collected by alternating between electrode types every minute of the experiment. Correlations between spot and band electrodes at absolute levels of all cardiovascular measures (cardiac output, impedance derivative, basal impedance level, Heather index, heart rate, left ventricular ejection time, pre-ejection period, stroke volume) were of high magnitude (ravg = .78), while the correlations for difference scores were lower (ravg = .50). Analyses of mean levels indicated spot electrodes yielded significantly lower values for the impedance derivative, Heather index, and basal impedance, and higher values for cardiac output and stroke volume, than band electrodes. The advantages and disadvantages associated with spot and band electrode configurations, as well as their use in ambulatory recording, are discussed.

Objective.—The purpose of this study was to investigate how migrainous subjects and controls differ in their cardiovascular reactivity and recovery to a cognitive and an acute pain laboratory stressor. Background.—Prior research suggests that individuals subject to migraine may respond physiologically to pain and stress differently than controls. Methods.—Fifty-two women (26 with migraine and 26 controls) participated in a single laboratory session. Multiple cardiovascular responses to a cognitive (mental arithmetic) and an acute pain (cold pressor task) stressor were recorded with cardiac impedance methods. The cardiovascular responses measured included systolic and diastolic blood pressure, heart rate, cardiac output, stroke volume, and total peripheral resistance. Results.—Results indicated that the migrainous participants displayed different cardiovascular recovery patterns for total peripheral resistance, cardiac output, and stroke volume following the termination of the mental arithmetic task. Conclusions.—These results support the hypothesis that individuals with migraine respond physiologically to stress differently than control individuals.

The purpose of this study was to investigate how migraine headache sufferers and headache-free controls differ in their appraisal and coping responses to a cognitive (mental arithmetic) and a physical (cold pressor) laboratory stressor. Fifty-two women (26 migraine headache and 26 controls) completed the study. Results indicated that migraine sufferers rated the cold pressor task as significantly more painful compared to headache-free participants. Migraine headache sufferers also reported more wishful thinking and self-criticism in managing the mental arithmetic stressor. In addition, migraine participants reported the use of more social withdrawal and catastrophizing in managing stress and pain outside of the laboratory.