RT Journal Article SR Electronic T1 The bimodal jitter: a single fibre electromyographic finding JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 403 OP 411 DO 10.1136/jnnp.37.4.403 VO 37 IS 4 A1 Barbara Thiele A1 Erik Stålberg YR 1974 UL http://jnnp.bmj.com/content/37/4/403.abstract AB The jitter, obtained by SFEMG recordings, mainly reflects the neuromuscular transmission time variability and is usually Gaussian distributed. Here is reported the bimodal distribution of the interpotential intervals, the flip-flop phenomenon. Long flip-flop in cases of reinnervation may indicate alternatively continuous and saltatory nerve conduction. Short flip-flop in normal subjects may be due to muscle fibre interaction or nerve conduction irregularities.