RT Journal Article SR Electronic T1 The fundamentals of electromyography JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 187 OP 194 DO 10.1136/practneurol-2011-000198 VO 12 IS 3 A1 Roger Graham Whittaker YR 2012 UL http://pn.bmj.com/content/12/3/187.abstract AB