Dr Matthew Pitt has been a Consultant Clinical Neurophysiologist at Great Ormond Street Hospital since 1990. He is responsible for all aspects of neurophysiological testing and has a particular specialist interest in paediatric electromyography (EMG). He has been lead clinician for the last seven years. Dr Pitt is acknowledged as one of the leading exponents of paediatric EMG, a specialist branch of electromyography, both nationally and internationally. Working at Great Ormond Street for many years, he has become an expert on the use in children of stimulation single fibre electromyography used in the diagnosis of myasthenic syndromes. This is acknowledged nationally and internationally.