Validity of measuring humeral torsion using palpation of bicipital tuberosities
Overhead throwing elicits various adaptations from the musculoskeletal system – the most distinct being posterior capsular tightness and increased degrees of humeral torsion (HT). Findings from recent literature indicate that a greater HT angle has injury-preventing and performance-enhancing effects.
HT shows a large degree of variation between different subjects and even within subjects, large side-to-side differences may be present. Assessment of the HT angle should be therefore be an integral part of the clinical examination procedure. Nevertheless, until now plain radiographs, computed tomography and ultrasound have been used as main diagnostic utilities. This study investigated the validity of manual palpation to determine the bicipital-forearm angle (BFA) as a measure for HT in comparison to ultrasound imaging to map the orientation of the bicipital tuberosities.
The bicipital-forearm angle (BFA) as a measure for humeral torsion (HT) (Image by: ncbi.nlm.nih.gov).
High correlation and agreement were present between the two methods, with an r of 0.85 and an ICC of 0.92, respectively, indicating that manual palpation is in fact a valid method to determine the BF and measure HT. > From: Dashottar & Borstad, Physiother Theor Pract 29 (2013) 67-74. All rights reserved to Informa Health USA, Inc.
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