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Frontal lobes, Temporal lobes - Coggle Diagram
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Temporal lobes
Korsakoff's syndrome
Specific brain regions: this area is still controversial but one supported view is that the critical lesion site for the disorder is the anterior thalamic nuclei where these nuclei are seen as part of the limbic-diencephalic memory circuit, like the hippocampus.
Cause: commonly caused by chronic alcohol abuse resulting in a lack of vitamin B1 (thiamine) which helps the brain cells to produce energy to function properly.
Symptoms: Episodic memory dysfunction specifically regarding context (temporal). Executive function impairment also observed in the area of context reconstruction.
Key findings: Impaired on both explicit and implicit memory tasks (Berry et al., 2014).
Semantic dementia
Symptoms: progressive semantic deficits - pruning of the semantic tree (in early SD)
Deficits typically progress to other cognitive domains inc behaviour (symptoms of frontotemporal dementia)
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Alzheimer's disease
Cause: a number of causes including protein accumulation (amyloid, neurofibrillary tangles), chronic inflammations and brain atrophy
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Fronto-Temporal Dementia
Cause: Frontotemporal dementia is caused by clumps of abnormal protein forming inside brain cells. These are thought to damage the cells and stop them working properly.
The proteins mainly build up in the frontal and temporal lobes of the brain at the front and sides. It's not fully understood why this happens, but there's often a genetic link.
Symptoms: personality and behavioural changes, language problems, attention, memory problems