PSYCH 140M Lecture Notes - Lecture 24: Semantic Dementia, Temporal Lobe, Psych
Document Summary
Prefrontal cortex forward area of frontal lobes. Patients show more impairment of script-related information than conceptual information. Cosentino, chute, libon, moore & grossman (2006) Compared semantic dementia patients (temporal lobe damage) to patients with both temporal and prefrontal cortex damage. Some scripts contained sequencing errors (e. g. dropping fish in bucket before casting fishing line) Other scripts contained errors in meaning (e. g. placing a flower on a hook when fishing) Subjects asked to detect errors in scripts. Semantic dementia patients detected just as many sequencing errors as meaning errors. Patients with prefrontal damage detected same number of meaning errors as semantic dementia patients, but let twice as many sequencing errors go through undetected. Preliminary evidence suggests that conceptual knowledge and schematic/script knowledge may be different types of memory stored in different areas of the brain. Brown & mcneill (1966) the experience where we can almost retrieve a memory, but not quite.
