PSY393H5 Lecture Notes - Lecture 7: Closed Head Injury, Frontal Lobe, Memory Span
Document Summary
Ability to deploy cognitive resources in goal-directed way. Critical for reasoning, decision making, problem solving, abstract thinking, social behaviour. Multifaceted: planning of goal directed actions, sequencing, prioritizing, cognitive flexibility. Initiating, modifying and shifting actions: evaluating consequences of actions, self-monitoring. Digit span task: forward maintenance, backward maintenance and manipulation. Most common symptom after: closed head injury, dementia ad parkinson huntington. Caused by: small lesions, disconnection syndrome -> fl intact not connected, damage to afferent projection areas. Medial (acc, supp motor area, premotor area) Lateral prefrontal regions: connect all other cortical zones, receive multimodal sensory info. Reciprocal projections with almost all cortical/subcortical areas. Receives projections from secondary cortical zones: somatic and visual info from post parietal, visual and auditory from sup temporal. From dorsomedial nucleus of thalamus: afferent inputs = amygdala/hypothalamus, allows info from internal states to influence processing of sensory stimuli. Direct link to dlpfc and limbic areas. Performance monitoring: sensitive to expected reward delivery/unexpected omission, source generator of ern.
