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Short‐term food deprivation increases amplitudes of heartbeat‐evoked potentials
Author(s) -
Schulz André,
Ferreira de Sá Diana S.,
Dierolf Angelika M.,
Lutz Annika,
van Dyck Zoé,
Vögele Claus,
Schächinger Hartmut
Publication year - 2015
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/psyp.12388
Subject(s) - heartbeat , heart rate variability , heart rate , electrophysiology , autonomic nervous system , psychology , audiology , medicine , afferent , food intake , endocrinology , neuroscience , cardiology , blood pressure , computer security , computer science
Abstract Nutritional state (i.e., fasting or nonfasting) may affect the processing of interoceptive signals, but mechanisms underlying this effect remain unclear. We investigated 16 healthy women on two separate days: when satiated (standardized food intake) and after an 18‐h food deprivation period. On both days, heartbeat‐evoked potentials ( HEPs ) and cardiac and autonomic nervous system activation indices (heart rate, normalized low frequency heart rate variability [ nLF HRV ]) were assessed. The HEP is an EEG pattern that is considered an index of cortical representation of afferent cardiovascular signals. Average HEP activity ( R wave +455–595 ms) was enhanced during food deprivation compared to normal food intake. Cardiac activation did not differ between nutritional conditions. Our results indicate that short‐term food deprivation amplifies an electrophysiological correlate of the cortical representation of visceral‐afferent signals originating from the cardiovascular system. This effect could not be attributed to increased cardiac activation, as estimated by heart rate and nLF HRV , after food deprivation.