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Task2: Cognition (Miller et. al (PFC: 2-way connections to all sensory…
Task2: Cognition
Miller et. al
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PFC: 2-way connections to all sensory neocortical and motor cortices and range of subcortical structures. Asserts top-down influence on a wide range of brain processes
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Functions:
Cognititve control over goal-directed behavior (exciting stimulus-response mapping points[associations])
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lateral PFC - interconnected with higher-order sensory and motor cortex. Also indirectly connected with Limbic system, processing internal info like reward.
Maintenance (working memory and task rules: biasing other brain areas towards task-relevant information)
mechanisms- dopamine influx into PFC, gating signal strengthening association at a given time,
Controls lower sensory, memory and motor operations for common purpose
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Damage: irresponsibility, stimulus-driven life, distractibility, impulsivity
Wisconsin Card task (sort cards acorindg to figure, card or number) and PFC damage - can learn 1st rule and then cant switch it
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Bunge et al.
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STUDY
H: test whether DLPFC and VLPFC or both would be implicated in retrieving/maintaining abstract rules
method: association of 4 verbal with4 nonverbal cues and 4 rules, and were asked if all of them were either correct or incorrect
RESULTS:
Left VLPFC, Parietal cortex and pre-SMA were sensitive to rules
VLPFC retrieves semantic info associated with a cue from left temporal cortex. then interacts with parietal cortex to retrieve and maintain relevant response contingencies
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Xu, Y et. al
Study - presented subjects with pictures of faces and houses and attend either to houses/faces (pics were overlaping)
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