Chapter 15 - Ageing and psychological disorders Flashcards
Cohort effect
An effect that occurs when people born in one historical period are at a different risk for a disorder that are people born in another historical period.
Alzheimer’s disease
A progressive neurological disorder that is the most common form of dementia.
Dementia
Neurological disorder in which a gradual decline of intellectual functioning occurs.
Neuroimaging
Range of techniques used to image the structure and/or functioning of the brain such as computerised tomography (CT), positron emission tomography (PET) and magnetic resonance imaging (MRI) scans.
Computerised tomography (CT)
Method of analysing brain structure by passing narrow X-ray beams through an individual’s head from several angles to produce measurements from which a computer can construct an image of the brain.
Positron emission tomography (PET)
Method of localising and measuring brain activity by detecting photons that result from the metabolisation of an injected isotope.
Meta-analysis
Statistical technique for summarising results across several studies.
Neurofibrillary tangles
Twists or tangles of filaments within nerve cells, especially prominent in the cerebral cortex and hippocampus, common in the brains of patients with Alzheimer’s disease.
Neuritic plaques
Deposits of amyloid protein that accumulate in the extracellular spaces of the cerebral cortex, hippocampus and other forebrain structures in patients with Alzheimer’s disease.
Vascular dementia
Type of dementia associated with symptoms of cerebrovascular disease (i.e., tissue damage in the brain due to a blockage of blood flow).
Stroke
Sudden damage to the brain due to a blockage of blood flow or haemorrhaging.
Aphasia
Impaired ability to produce or comprehend language.
Apraxia
Impaired ability to perform common voluntary behaviours.
Agnosia
Impaired ability to recognise objects or people.
Focal neurological symptoms
Symptoms (such as weakness or tingling in the extremities) whose causation can be localised to a specific anatomical site in the central nervous system.