RT Journal Article SR Electronic T1 Inability to Consistently Elicit a Motor Response Following Sensory Paresthesia During Interscalene Block Administration JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 7 OP 7 DO 10.1136/rapm-00115550-199823031-00007 VO 23 IS Suppl 1 A1 W F Urmey A1 J Stanton A1 S O'Brien A1 V Tagariello A1 T L Wickiewicz YR 1998 UL http://rapm.bmj.com/content/23/Suppl_1/7.abstract AB