Schizophrenia produces auditory hallucinations. Usually people “imagine” their inner dialog. It is clear to them that even though these *thoughts* have an auditory quality, such is transparently notional.
People with schizophrenia actually hear some of these thoughts as voices. The disorder projects this inner monologue at the neurology which usually processes and interprets auditory signals from the ears. Their ears are fine. But the mind cannot discern hallucinations from real sounds because, from a neurological perspective, both apparently emerge from the same place
As you may surmise, this effect is catastrophically destructive to the sufferer’s own sense of safety, since these “voices” are inescapable.
With therapy, some schizophrenics become able to discern which sounds are hallucinations and will consciously filter them. But it’s exhausting.
The mechanism that actually causes the disruptive mis-signalling is still poorly understood.
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