Hallucinations

Silent multitudes : Charles Bonnet syndrome

The prisoners cinema : sensory deprivation

A few nanograms of wine : hallucinatory smells

Hearing things

The illusions of Parkinsonism

Altered states

Patterns : visual migraines

The "sacred disease"

Bisected : hallucinations in the half-field

Delirious

On the threshold of sleep

Narcolepsy and night hags

The haunted mind

Doppelgangers : hallucinating oneself

Phantoms, shadows, and sensory ghosts.