PSYCH 3JJ3 Lecture Notes - Lecture 23: Prefrontal Cortex, Surgency, Royal Numismatic Society
11 Dec 2019
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Document Summary
Adolescent peer interaction and trait surgency weaken medial prefrontal cortex responses to failure (segalowitz et al. , 2012) Adolescent risk taking has been known to increase in the presence of peers. The authours hypothesized that peer interaction reduces the activation of the medial prefrontal cortex (mpfc) that is required for self-regulation of reward-driven behaviour. The authours also expected that mpfc activity would be reduced more in those with greater surgency, a composite trait of behavioural approach, sensation seeking and positive affect. 20 15-year-old boys splayed a simulated driving video game alone in the presence of peers who were encouraged to call out advice while we recorded the feedback-related negativity (frn) event-related potential in response to an impending car crash. The frn appears as a negative deflection in the erp waveform around 250 ms after performance feedback. Insert graph photo: when peers are present, you see shallower deflection indicative of lower brain activity in the graph.
