Reciprocal modulation of eye‐blink and pinna‐flexion components of startle during reward anticipation

Male Reflex, Startle Adolescent Blinking Electromyography Young Adult 03 medical and health sciences 0302 clinical medicine Punishment Reward Taste Gambling Humans Female Ear Auricle
DOI: 10.1111/j.1469-8986.2009.00867.x Publication Date: 2009-07-01T15:51:47Z
ABSTRACT
AbstractBecause expectancies play a central role in current theories of dopaminergic neuron function, it is important to develop measures of reward anticipation processes. In the present study, reflexogenic bursts of white noise were presented to 39 healthy young adults as they awaited rewards and punishments in a gambling‐like task. The rewards were small pieces of chocolate; the punishments, segments of bitter‐tasting banana peel. Consistent with prior research on affective valence, postauricular reflexes were larger prior to rewards than punishments, whereas the reverse was true for acoustic blink reflexes. We theorized that potentiation of the postauricular reflex prior to consuming appetizing food is related to the priming of ear‐retraction musculature during nursing in our remote ancestors.
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