External rotation (or lateral rotation) is rotation away from the center of the body.
The muscles of external rotation include:
- of arm/humerus at shoulder
- Deltoid muscle
- Teres minor
- of thigh/femur at hip
- Gluteus maximus
- Lateral rotator group
- gemellus superior
- obturator internus
- gemellus inferior
- obturator externus
- quadratus femoris
- of leg at knee
- Biceps femoris
- of eyeball (motion is also called "extorsion" or excyclotorsion)
- Inferior rectus muscle
- Inferior oblique muscle
Other articles related to "rotation, external rotation, external":
... During rotation of the arm lateral rotation stretches all three ligaments while medial rotation relaxes them ... External rotation Anterior glide Inferior glenohumeral lig ... Anterior band Posterior band Abduction and external rotation Abduction and internal rotation Non specific Coracohumeral lig ...
... The amount of external rotation at the onset of apprehension is noted ... The shoulder is brought back to resting position and the shoulder external rotation is repeated, this time with posteriorly directed force over the humeral ... The amount of external rotation when the patient becomes apprehensive is again noted ...
... Description Beginning End The most effective is the side-lying external rotation, which activates the supraspinatus, subscapularis, infraspinatus and teres minor ... This is an excellent all-around shoulder exercise The propped external rotator targets the infraspinatus and teres minor ... The posterior deltoid also aids in external rotation ...
Famous quotes containing the words rotation and/or external:
“The lazy manage to keep up with the earths rotation just as well as the industrious.”
—Mason Cooley (b. 1927)
“Without free, self-respecting, and autonomous citizens there can be no free and independent nations. Without internal peace, that is, peace among citizens and between the citizens and the state, there can be no guarantee of external peace.”
—Václav Havel (b. 1936)