1. Electrophysiologic Evidence of Spinal Accessory Neuropathy in Patients With Cervical Myofascial Pain Syndrome 
Chein-Wei Chang, MD, Kai-Yin Chang, MS, Yu-Ren Chen, MD, Po-Ling Kuo, MD, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 92, Issue 6, Pages (June 2011)
DOI: /j.apmr
Copyright © 2011 American Congress of Rehabilitation Medicine Terms and Conditions

2. Fig 1
Landmarks of placing electrodes for the SAN conduction study. (A) Left anterior-lateral view for the neck. (B) Posterior view for the neck and upper back. Abbreviations: G, ground electrode; RaL, active electrode for lower trapezius recording; RaM, active electrode for middle trapezius recording; RaU, active electrode for upper trapezius recording; RrL, reference electrode for lower trapezius recording; RrM, reference electrode for middle trapezius recording; RrU, reference electrode for upper trapezius recording; SaD, active electrode for distal stimulation; SaP, active electrode for proximal stimulation; SrD, reference electrode for distal stimulation; SrP, reference electrode for proximal stimulation.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2011 American Congress of Rehabilitation Medicine Terms and Conditions

3. Fig 2
Relation between CMAP amplitude and disease duration in patients with cervical MFPS.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2011 American Congress of Rehabilitation Medicine Terms and Conditions

4. Fig 3
Relation between MCD and disease duration in patients with cervical MFPS.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2011 American Congress of Rehabilitation Medicine Terms and Conditions