Table of Contents
ISRN Anesthesiology
Volume 2011, Article ID 298983, 3 pages
Clinical Study

Comparison of the Neuromuscular Profile of the First Dorsal Interosseous Muscle and the Flexor Hallucis Brevis Muscle as Measured by Electromyography

1Department of Anesthesiology, Fukuoka University Faculty of Medicine, Fukuoka 8140180, Japan
2Department of Anesthesiology, Fukuoka University Chikushi Hospital, Chikushino 8188502, Japan

Received 2 November 2011; Accepted 7 December 2011

Academic Editors: D. Karakaya and C. Motamed

Copyright © 2011 Yasuyuki Sugi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Lower limb muscles recover faster than upper limb muscles following administration of nondepolarizing neuromuscular relaxants until the train-of-four ratio (TOFR) reached 0.7. However, no study has been conducted to evaluate the recovery time of the flexor hallucis brevis muscle (FHBM), up to a TOFR of 0.9, which indicates satisfactory recovery of neuromuscular blockade. The aim of this study was to determine electromyographically the relationship between the TOFRs of the FHBM and the first dorsal interosseous muscle (FDIM), following 0.1 mg/kg of vecuronium. Eighteen patients were enrolled in this study. Electromyography of the FDIM and the FHBM was monitored. Onset times and recovery times to TOFRs of 0.7 and 0.9 of both muscles after administration of vecuronium were measured. The onset time in the FDIM was not different from that in the FHBM ( 𝑃 = 0.10). Recovery time to TOFR 0.7 was significantly faster in the FHBM than in the FDIM ( 𝑃 < 0.013). There was no significant difference in the meantime to reach TOFR 0.9 between the FDIM and the FHBM ( 𝑃 = 0.11). There is no clinical importance in the difference of neuromuscular recovery between the FHBM and the FDIM after TOFR reached 0.9 following administration of vecuronium.