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The time course of incentive processing in anticipatory and consummatory anhedonia.
Journal of Affective Disorders 2018 October 2
BACKGROUND: Anhedonia, the reduced capacity to experience pleasure, has long been regarded as a cardinal symptom in depression and schizophrenia. Recent evidence highlights that anhedonia is not a single construct but consists of an anticipatory component and a consummatory component, which is captured by the Temporal Experience of Pleasure Scale (TEPS). The current event-related potential study examined the electrophysiological underpinnings of anticipatory and consummatory aspects of anhedonia as assessed by the TEPS in a non-clinical sample.
METHODS: EEG was recorded during both anticipatory and consummatory phases of incentive processing in an anticipatory-anhedonia (ANT) group, a consummatory-anhedonia (CON) group, and a control (CNT) group selected from a large sample based on their TEPS scores.
RESULTS: The ANT relative to the CON group exhibited a reduced cue-P3 during the anticipatory phase, a less positive feedback-related negativity (FRN) and a blunted feedback P3 (fb-P3) during the consummatory phase. Moreover, correlation results revealed a dissociation between anticipatory and consummatory anhedonia, which occurred in an unexpected way such that higher levels of anticipatory anhedonia were associated with reduced fb-P3 amplitudes whereas higher levels of consummatory anhedonia with enhanced cue-P3 and FRN amplitudes.
LIMITATION: The sample size for each group was relatively small.
CONCLUSIONS: Anticipatory and consummatory anhedonia as measured by the TEPS might be driven by abnormal motivational salience, which was represented by the cue-P3 during the anticipatory phase and the FRN and fb-P3 during the consummatory phase of incentive processing.
METHODS: EEG was recorded during both anticipatory and consummatory phases of incentive processing in an anticipatory-anhedonia (ANT) group, a consummatory-anhedonia (CON) group, and a control (CNT) group selected from a large sample based on their TEPS scores.
RESULTS: The ANT relative to the CON group exhibited a reduced cue-P3 during the anticipatory phase, a less positive feedback-related negativity (FRN) and a blunted feedback P3 (fb-P3) during the consummatory phase. Moreover, correlation results revealed a dissociation between anticipatory and consummatory anhedonia, which occurred in an unexpected way such that higher levels of anticipatory anhedonia were associated with reduced fb-P3 amplitudes whereas higher levels of consummatory anhedonia with enhanced cue-P3 and FRN amplitudes.
LIMITATION: The sample size for each group was relatively small.
CONCLUSIONS: Anticipatory and consummatory anhedonia as measured by the TEPS might be driven by abnormal motivational salience, which was represented by the cue-P3 during the anticipatory phase and the FRN and fb-P3 during the consummatory phase of incentive processing.
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