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:

Chronic alcoholism causes toxicity in the central and peripheral nervous system , Marchiafava - Bignami disease being one of its less frequent complications . This entity is characterized by demyelinization of the callous body . The clinical picture is varied , the most frequent symptoms being : dementia , attention disorders , gait difficulty and interhemispheric deconnection syndrome . Neuroimaging techniques , basically magnetic resonance imaging , are required for its diagnosis . We present the case of a patient who was admitted to the intensive care unit due to neurological deterioration and respiratory arrest . He was finally diagnosed as having Marchiafava - Bignami disease . We explain the diagnostic difficulties and therapeutic alternatives of this disease .
dementia
attention disorders
gait difficulty