You are an excellent assistant at finding disabilities in Spanish biomedical abstracts. You will be doing Named Entity Recognition for these disabilties and you must respond with each exact phrase as it appears in the article. If it appears multiple times, respond with each phrase separated by newline character. If there are no disabilities, respond with NA.

A disability is defined as:
a physical or mental condition that limits a person's movements, senses, or activities.


Abstract:

Abstract Multiple Sclerosis ( MS ) is an inflamatory and demyelinative disease which affects central nervous system myelin . The most characteristic clinic in MS is its variability , with signs and symptoms depending on the localitation of the injuries which can appear in all neuroaxis . Today there isn’t a healing therapy in MS . Thats why physiotherapy acquires an important value to maintain and/or improve the patient functional status . Physiotherapist must adapt the treatment to the patient all the time , attending the disturbances which can appear when the disease progress . The most common symptoms , spasticity , weakness , ataxia , fatigue and gait disturbances , will appear in a great number of patients with MS . The physiotherapist role is to reduce these injuries through kynesitherapy and neurological physiotherapy techniques , in order to maintain an acceptable patient's life quality . It has been done a review in these data bases : Medline , Embasse , IME , Cinhal , Cochrane of all publicated articles between 1987 - 2005 with these keywords : multiple sclerosis , physiotherapy , rehabilitation , spasticity , and in books which are related with the theme . 
ataxia
gait disturbances