Second Lumbrical Muscle Recordings Improve Localization in Severe Carpal Tunnel Syndrome Richard Brannegan, MD, Russell Bartt, MD Archives of Physical Medicine and Rehabilitation Volume 88, Issue 2, Pages 259-261 (February 2007) DOI: 10.1016/j.apmr.2006.10.035 Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions
Fig 1 Stimulation and recording sites for second lumbrical CMAP. Archives of Physical Medicine and Rehabilitation 2007 88, 259-261DOI: (10.1016/j.apmr.2006.10.035) Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions
Fig 2 Upper trace: no APB CMAP, positive deflection from volume conducted lumbrical muscle potential. Lower trace: second lumbrical (2L) CMAP. Archives of Physical Medicine and Rehabilitation 2007 88, 259-261DOI: (10.1016/j.apmr.2006.10.035) Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions
Fig 3 Recording electrode site just radial to the third metacarpal (see fig 1). Upper trace: second lumbrical CMAP with median nerve stimulation at the wrist. Lower trace: first palmar and second dorsal interosseous muscle (INT) CMAP with ulnar nerve stimulation at wrist. Archives of Physical Medicine and Rehabilitation 2007 88, 259-261DOI: (10.1016/j.apmr.2006.10.035) Copyright © 2007 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions