Aetiology explanations of the causes of disease.
Agonist drug that increases the action of a neurotransmitter.
Agranulocytosis condition in which the bone marrow fails to produce enough white blood cells called neutrophils. Leaves the individual prone to infection.
Alexithymia a paucity of emotional experience and awareness, with an associated poverty of imagination and a tendency to focus upon the tangible and mundane.
Alogia poverty of speech; literally, 'no words'.
Alzheimer's disease the most common cause of dementia in old age.
Antagonist drug that inhibits the action of a neurotransmitter.
Anterograde amnesia lack of memory for events that occur after an event that causes amnesia.
Aphonia inability to speak.
Ataxia an incoordination and unsteadiness due to brain's failure to regulate posture and strength and direction of limb movement.
Avolition lack of volition, or voluntary motivation.
Behaviour therapy form of therapy that targets behavioural change by changing the triggers or consequences of behaviour using operant or classical conditioning-based interventions.
Blood-brain barrier protective barrier formed in blood vessels of the brain. Prevents some drugs from passing from the blood to the brain.
Catatonic behaviour behaviour found in one form of schizophrenia; includes posturing, or 'waxy flexibility', mutism and stupor.
Catharsis reliving past repressed emotions in order to come to terms with past confiicts.
Chromosome structures within a cell that contain genes.
Classical conditioning the learned association between two co-occurring stimuli, such that a similar response is evoked by either.
Client a term often used to denote an individual in therapy. In contrast to words such as patient or subject, it is used to indicate the helping, non-hierarchical nature of the therapeutic relationship between therapist and individual.