The incapacity benefit handbook for doctors says that any neurological condition which is progressive and has resulted in a severe level of disability
will be sufficient grounds for exemption as may advanced states of the following-
- motor neurone disease;
- Parkinson's disease;
- Huntingdon's chorea;
- cerebellar ataxia;
- late phase of multiple sclerosis;
- polimyositis;
- dermatomyositis;
- muscular dystrophy;
- dystrophia myotonica;
- myasthenia gravis;
- hereditary neuropathy;
- severe and persistent polyneuropathy;
- Guillain-barre syndrome;
- Syringomyelia;
- cervical myelopathy.
Doctors are advised to consider exemption in the above cases if-
- There is a need for assistance from another person for aspects of personal care; or
- There is additional disablement from cerebrovascular disease, visual impairment or myopathy

