Agnosia
Agnosia is the inability to process sensory information. Often there is a loss of ability to recognize objects, persons, sounds, shapes, or smells while the specific sense is not defective nor is there any significant memory loss. It is usually associated with brain injury or neurological illness, particularly after damage to the occipitotemporal border, which is part of the ventral stream. Agnosia only affects a single modality, such as vision or hearing. More recently, a top-down interruption is considered to cause the disturbance of handling perceptual information.
Hellblade: Senua's Sacrifice
Antoniades admitted that during his research, he "didn't have to look very far to discover my own ignorance of the subject". To portray psychosis properly, Ninja Theory "consulted world-leading neuroscientists and non-profit organizations like Wellcome Trust to properly capture the experience of psychosis and its devastating effects on the human mind". Antoniades "learnt that people can experience hallucinations and delusional beliefs without it being a problem – the illness comes when those experiences cause suffering. Often the recovery is not about curing yourself of hallucinations, but finding ways to live with them. That was a revelation to me".