From the NPC Wikipedia page:
Neurological signs and symptoms include cerebellar ataxia (unsteady walking with uncoordinated limb movements), dysarthria (slurred speech), dysphagia (difficulty in swallowing), tremor, epilepsy (both partial and generalized), vertical supranuclear palsy (upgaze palsy, downgaze palsy, saccadic palsy or paralysis), sleep inversion, gelastic cataplexy (sudden loss of muscle tone or drop attacks), dystonia (abnormal movements or postures caused by contraction of agonist and antagonist muscles across joints); most commonly begins with turning of one foot when walking (action dystonia) and may spread to become generalized, spasticity (velocity-dependent increase in muscle tone), hypotonia, ptosis (drooping of the upper eyelid), microcephaly (abnormally small head), psychosis, progressive dementia, progressive hearing loss, bipolar disorder, major and psychotic depression; can include hallucinations, delusions, mutism, or stupor.
From Wikipedia, after I edited the NPC page:
Your shit is fucked.
(Was taken down shortly after and all my Wiki editing privileges were suspended, but it was worth it.)