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Arm external rotation

Last revised by Patrick O'Shea on 17 Sep 2023

Citation, DOI, disclosures and article data

Citation:

Hacking C, O'Shea P, Arm external rotation. Reference article, Radiopaedia.org (Accessed on 20 May 2024) https://doi.org/10.53347/rID-67228

DOI:

https://doi.org/10.53347/rID-67228

Permalink:

https://radiopaedia.org/articles/67228

rID:

67228

Article created:

24 Mar 2019, Craig Hacking ◉

Disclosures:

At the time the article was created Craig Hacking had no recorded disclosures.

View Craig Hacking's current disclosures

Last revised:

17 Sep 2023, Patrick O'Shea ◉

Disclosures:

At the time the article was last revised Patrick O'Shea had no financial relationships to ineligible companies to disclose.

View Patrick O'Shea's current disclosures

Revisions:

2 times, by 2 contributors - see full revision history and disclosures

Systems:

Musculoskeletal

Sections:

Anatomy

Synonyms:

arm lateral rotation

External or lateral rotation of the arm represents the movement of the humerus when an arm flexed to 90° at the elbow is externally rotated around the longitudinal plane of the humerus such that the hand moves away from the midline of the body. It is the opposite of arm internal rotation.

As with internal rotation, the degree of rotation is dependent on the degree of abduction. When the arm is adducted, medial rotation of 40-55° is possible. However, as the arm is abducted, this increases towards 70°.

It is produced by: