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:

Essential tremor is the most common adult movement disorder . Traditionally considered as a benign disease , it can cause an important physical and psychosocial disability . Drug treatment remains poor and often unsatisfactory . Current therapeutical strategies are reviewed according to the level of discomfort caused by tremor : mild tremor , non - pharmacological strategies , alcohol , acute pharmacological therapy ; moderate tremor , pharmacological therapies ( propranolol , gabapentin , primidone , topiramate , alprazolam and other drugs ) , and severe tremor , the role of functional surgery is emphasized ( thalamic deep brain stimulation , thalamotomy ) . It is also described the more specific treatment of head tremor with the use botulinum toxin . Finally , several points are exposed to guide the immediate research of this disease in near future .
movement disorder
physical and psychosocial disability