external rotation

(redirected from Laterally rotates)

external rotation

Lateral rotation Biomechanics The act of turning about an axis passing through the center of the leg; ER of the leg occurs with closed chain supination; the talus acts as an extension of the leg in frontal and transverse planes

ex·ter·nal ro·ta·tion

(eks-tĕr'năl rō-tā'shŭn)
Movement of a joint, around its long axis, away from the midline of the body.
Synonym(s): lateral rotation.
References in periodicals archive ?
* Infraspinatus -- extends and laterally rotates the arm.
* Teres major -- adducts and laterally rotates the arm.
The gluteals (maximus, medius, and minimus) and the "deep six" muscles of the hip (piriformis, quadratus femoris, obturator internus, obturator externus, gemellus superior, and gemellus inferior) serve to flex, extend, abduct, adduct, and medially or laterally rotate the hip.