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Muscle Nerve. 2013 Jul;48(1):100-4. doi: 10.1002/mus.23712. Epub 2013 Apr 21.

Sternocleidomastoid ultrasonography data for muscular torticollis in infants.

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1
Department of Rehabilitation Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.

Abstract

INTRODUCTION:

This study was performed to obtain normative ultrasonographic data of the sternocleidomastoid (SCM) muscle in infants and to describe an ultrasound method for evaluating muscular torticollis.

METHODS:

The thickness and cross-sectional area (CSA) of the sternal and clavicular heads of the SCM in 84 subjects were analyzed retrospectively. The diagnostic performance of ultrasonography (US) was estimated using receiver-operating characteristic analysis.

RESULTS:

Muscle thickness increased with age until 10 months. There were no significant differences in thickness or CSA between the right and left sides (P > 0.05) in normal subjects. A ratio of the thickness of the affected side to the unaffected side for the sternal head of the SCM muscle of >1.19 showed a diagnostic sensitivity of 97.9% and specificity of 96.4%.

CONCLUSIONS:

Distinguishing the heads of the SCM muscle and comparing the thickness of the same head on both sides using US may be helpful for evaluating torticollis in infants.

PMID:
23605885
DOI:
10.1002/mus.23712
[Indexed for MEDLINE]
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