Muscle contraction force and fatigue: effects on mismatch negativity.
Muscle load can affect the performance of concurrent cognitive task. This effect is often explained by limited resources in the voluntary attention system. To examine whether earlier stages of cognitive information processing might be affected, we recorded the mismatch negativity component (MMN) of the auditory event-related brain potential before, during and after sustained handgrip at 7 and 30% of maximal voluntary contraction. MMN is an index of automatic detection of a deviating auditory event. MMN was not affected by force level. However, its amplitude at fronto-central sites decreased during the fatiguing 30% contraction, while it tended to increase during the light 7% work. Thus, muscle fatigue may affect auditory information processing at preattentive and preconscious stages, which could modify cognitive performance.
Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russian Federation. maria.evstigneeva@gmail.com
Maria D
MD
Evstigneeva
Alexander A
AA
Alexandrov
Svend Erik
SE
Mathiassen
Eugene
E
Lyskov
D000328:Adult; D001288:Attention / Q000502:physiology*; D001307:Auditory Perception / Q000502:physiology*; D003071:Cognition / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005080:Exercise Test / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000502:physiology*; D018763:Muscle Fatigue / Q000502:physiology*; D009433:Neural Inhibition / Q000502:physiology; D055815:Young Adult