title: Determination of an ideal stimulation site of the medial antebrachial cutaneous nerve using ultrasound and investigation of the efficiency.
abstract: OBJECTIVE
  To determine an ideal stimulation site of the medial antebrachial cutaneous nerve (MACN) using ultrasound measurement and to compare the efficiency of the new stimulation site with the conventional stimulation site on the nerve conduction study.
  
  
  METHODS
  Both arms of 15 healthy participants were measured using ultrasound. The MACN was identified in the transverse view at each 0, 2, 4, 6, and 8 cm proximal sites from the medial epicondyle, and the distances to the median nerve and to the skin from the MACN were measured. The ideal stimulation site should be located at the level which can give the shortest distance from the skin and the longest distance from the median nerve in terms of volume conduction. To confirm the efficiency of the ideal site, we measured the amplitude of the MACN conduction study at the ideal site against one at the 4 cm proximal to the medial epicondyle (conventional site).
  
  
  RESULTS
  The ultrasound showed the ideal stimulation site for the MACN could be the elbow crease line. However, the nerve conduction study revealed that the amplitudes of the MACN were significantly larger at the 4 cm proximal to the medial epicondyle compared with ones at the ideal site.
  
  
  CONCLUSIONS
  The ideal stimulation site based on the ultrasound did not permit better stimulation site for the nerve conduction study of the MACN compared with the conventional site. Careful adjustment of the stimulation site on the basis of this study would contribute to an accurate conduction study of the MACN.
authors.affiliation: Department of Rehabilitation Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Chang Hoon
authors.initials: CH
authors.lastname: Oh
authors.affiliation: Department of Rehabilitation Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Nam Su
authors.initials: NS
authors.lastname: Park
authors.affiliation: Department of Rehabilitation Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Jae Min
authors.initials: JM
authors.lastname: Kim
authors.affiliation: Department of Rehabilitation Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Min Wook
authors.initials: MW
authors.lastname: Kim
keywords: Medial antebrachial cutaneous nerve; Neural conduction; Ultrasonography