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Proceedings Paper

An ambulatory recording system for the assessment of autonomic changes across multiple days
Author(s): John J. Sollers III; Yoshiharu Yonezawa; Rebecca A. Silver; Marcellus M. Merritt; Julian F. Thayer
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Paper Abstract

Recent evidence indicates that poor autonomic regulation, indexed by decreased heart period variability (HPV), is associated with decreased working memory. HPV analyses are computed on the interbeat interval time series derived from the electrocardiogram (EKG). Unfortunately, the duration of the data collection and the issue of the size of ambulatory monitors with sufficient storage capacity for multi-day records is somewhat problematic. In the present paper we describe a system that allows for the collection of large amounts of high quality data using a small data collection device. The recording system consists of a miniature, single-module electrocardiogram-recording device. This module consists of an integrated three-electrode device that is attached to the chest of the subject. A low power 8-bit micro-controller detects the R-spike and stores the time between R-spikes in milliseconds on a 512 KB EEPROM. This system can record continuously for over four days. This system will allow the recording of cardio-dynamics in the field and provide highly reliable data across multiple days. The use of this device to assess physiological function in military operations would allow researchers to examine longer data records across several contexts and to understand the role of changes in autonomic function as they relate to performance.

Paper Details

Date Published: 23 May 2005
PDF: 7 pages
Proc. SPIE 5797, Biomonitoring for Physiological and Cognitive Performance during Military Operations, (23 May 2005); doi: 10.1117/12.604413
Show Author Affiliations
John J. Sollers III, National Institute on Aging/NIH (United States)
Yoshiharu Yonezawa, Hiroshima Institute of Technology (Japan)
Rebecca A. Silver, National Institute on Aging/NIH (United States)
Marcellus M. Merritt, National Institute on Aging/NIH (United States)
Julian F. Thayer, National Institute on Aging/NIH (United States)

Published in SPIE Proceedings Vol. 5797:
Biomonitoring for Physiological and Cognitive Performance during Military Operations
John A. Caldwell; Nancy Jo Wesensten, Editor(s)

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