Hulens M, Bruyninckx F, Rasschaert R, et al. - In view of increasing evidence suggesting that fibromyalgia most likely represents a neurological dysfunction, researchers here evaluated electrodiagnostic test results, including the lumbar and sacral nerve root myotomes of patients diagnosed with fibromyalgia. All 17 patients assessed were female. This work is identified to be the first presenting electrodiagnostic data of both lumbar and sacral nerve root myotomes in fibromyalgia patients. Neurogenic abnormalities were evident in all patients; these abnormalities were more pronounced in the sacral vs lumbar myotomes, with a rather patchy distribution pattern. They suggest, in addition to skin punch biopsies to assess small fiber neuropathy, assessment of the anal reflex as possibly a valuable part of the diagnostic pathway in patients with fibromyalgia.