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Clin Neurophysiol. 2016 Aug;127(8):2728-2732. doi: 10.1016/j.clinph.2016.05.010. Epub 2016 May 25.

Prolonged phone-call posture causes changes of ulnar motor nerve conduction across elbow.

Author information

1
Don Carlo Gnocchi Onlus Foundation, Piazzale Morandi 6, 20100 Milan, Italy; Department of Geriatrics, Neurosciences and Orthopaedics, Catholic University of the Sacred Heart, Largo F. Vito 1, 00168 Rome, Italy. Electronic address: lpadua@rm.unicatt.it.
2
Don Carlo Gnocchi Onlus Foundation, Piazzale Morandi 6, 20100 Milan, Italy; Board of Physical Medicine and Rehabilitation, Department of Orthopaedic Science, "Sapienza" University, Piazzale Aldo Moro 5, 00185 Rome, Italy.
3
Department of Geriatrics, Neurosciences and Orthopaedics, Catholic University of the Sacred Heart, Largo F. Vito 1, 00168 Rome, Italy.
4
Department of Clinical and Experimental Medicine, Unit of Clinical Neurology, University of Sassari, viale san Pietro, 07100 Sassari, Italy.
5
Department of Geriatrics, Neurosciences and Orthopaedics, Catholic University of the Sacred Heart, Largo F. Vito 1, 00168 Rome, Italy; IRCCS San Raffaele-Pisana, Rome, Italy.

Abstract

OBJECTIVE:

Postures and work-hobby activities may play a role in the origin and progression of ulnar neuropathy at the elbow (UNE), whose occurrence appears to be increasing. The time spent on mobile-phone has increased in the last decades leading to an increased time spent with flexed elbow (prolonged-phone-posture, PPP). We aimed to assess the effect of PPP both in patients with symptoms of UNE and in symptom-free subjects.

METHODS:

Patients with pure sensory symptoms of UNE and negative neurophysiological tests (MIN-UNE) and symptom-free subjects were enrolled. We evaluated ulnar motor nerve conduction velocity across elbow at baseline and after 6, 9, 12, 15, and 18min of PPP in both groups. Fifty-six symptom-free subjects and fifty-eight patients were enrolled. Globally 186 ulnar nerves from 114 subjects were studied.

RESULTS:

Conduction velocity of ulnar nerve across the elbow significantly changed over PPP time in patients with MIN-UNE, showing a different evolution between the two groups.

CONCLUSIONS:

PPP causes a modification of ulnar nerve functionality in patients with MIN-UNE.

SIGNIFICANCE:

PPP may cause transient stress of ulnar nerve at elbow.

KEYWORDS:

Epidemiology; Mobile phone; Nerve entrapment syndrome; Neuropathy; Ulnar nerve; Ulnar neuropathy at elbow

PMID:
27417044
DOI:
10.1016/j.clinph.2016.05.010
[Indexed for MEDLINE]

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