Hyperaesthesia
Increased intensity of sensation
Hyperacusis: increased sensitivity to noiseAnxiety, depression, migraine, hangover
Intense colourEpileptic aura, hallucinogenic agents
Hypoaesthesia
Decreased intensity of sensation.
Causes of Hypoaesthesia
- Dementia
- Depression
Dysmegalopsia
Change in the perceived form of an object.
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- Micropsia (lilliputian hallucination): objects appear to be smaller than they are
- Macropsia: objects appear to be larger than they are
Causes of Dysmegalopsia
- Benign - especially if perceived only while falling asleep (hypnagogic) or waking up (hypnopompic).
- Retinal disease
- Disorders of accomodation
- Temporal / parietal lesions
- Schizophrenia
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