Guillain Barré syndrome is an acute polyradiculoneuropathy with different forms of presentation and is currently the leading cause of acute arreflexic paralysis in the world, its diagnosis is clinical and additional assesment as electrodiagnosis are used for differential diagnosis, rank among the variants (demyelinating or axonal) and define prognosis. The purpose of this paper is to make a narrative review of the literature, emphasizing the electrophysiological study, describing early findings, the most common mistakes, while highlighting the importance of classification chart to guide actions towards rehabilitation and functional recovery.

The myofascial pain syndrome is an entity that is often associated with many of the prevalent pathologies that generate musculoskeletal pain distributed in the different body segments (upper extremities, spine and lower extremities), and may be responsible for the chronification of problem if it is not considered, diagnosed and managed in a comprehensive and timely manner in conjunction with the underlying pathology.