Last Tuesday, this tweet from @AllergyNotes caught my eye.
Call cubital tunnel syndrome a "cell phone elbow" and you make the front page of CNN.com: http://bit.ly/RaXrt and http://bit.ly/TTRfg
… the ulnar nerve as it traverses the posterior elbow, wrapping around the medial condyle of the humerus. When people hold their elbow flexed for a prolonged period, such as when speaking on the phone or sleeping at night, the ulnar nerve is placed in tension; the nerve itself can elongate 4.5 to 8 mm with elbow flexion……..
Chronic and severe compression may lead to permanent motor deficits, including an inability to adduct the small finger (Wartenberg sign) and severe clawing of the ring and small fingers (a hand posture of metacarpophalangeal extension and flexion of the proximal and distal interphalangeal joints due to dysfunction of the ulnar-innervated intrinsic hand musculature). Patients may be unable to grasp things in a key-pinch grip, using a fingertip grip instead (Froment sign).
Q:What is cell phone elbow, and what should we tell our patients?; Cleveland Clinic Journal of Medicine May 2009 vol. 76 5 306-308 (doi: 10.3949/ccjm.76a.08090); Darowish, Michael MD, Lawton, Jeffrey N. MD, and Evans, Peter J MD, PhD
Cubital Tunnel Syndrome: eMedicine Article, Feb 9, 2007; James R Verheyden, MD and Andrew K Palmer, MD