external rotation


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.