External rotation
Encyclopedia
External rotation is rotation away from the center of the body.
The muscles of external rotation include:
The muscles of external rotation include:
- of armArmIn human anatomy, the arm is the part of the upper limb between the shoulder and the elbow joints. In other animals, the term arm can also be used for analogous structures, such as one of the paired forelimbs of a four-legged animal or the arms of cephalopods...
/humerusHumerusThe humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow....
at shoulderShoulderThe human shoulder is made up of three bones: the clavicle , the scapula , and the humerus as well as associated muscles, ligaments and tendons. The articulations between the bones of the shoulder make up the shoulder joints. The major joint of the shoulder is the glenohumeral joint, which...
- Deltoid muscleDeltoid muscleIn human anatomy, the deltoid muscle is the muscle forming the rounded contour of the shoulder. Anatomically, it appears to be made up of three distinct sets of fibers though electromyography suggests that it consists of at least seven groups that can be independently coordinated by the central...
- Infraspinatus
- Teres minor
- Deltoid muscle
- of thighThighIn humans the thigh is the area between the pelvis and the knee. Anatomically, it is part of the lower limb.The single bone in the thigh is called the femur...
/femurFemurThe femur , or thigh bone, is the most proximal bone of the leg in tetrapod vertebrates capable of walking or jumping, such as most land mammals, birds, many reptiles such as lizards, and amphibians such as frogs. In vertebrates with four legs such as dogs and horses, the femur is found only in...
at hip- Gluteus maximusGluteus maximus muscleThe gluteus maximus is the largest and most superficial of the three gluteal muscles...
- Lateral rotator groupLateral rotator groupThe Lateral rotator group are a group of muscles of the hip which all externally rotate the femur in the hip joint. It consists of the following muscles: * piriformis* gemellus superior* obturator internus* gemellus inferior* obturator externus...
- piriformis
- gemellus superior
- obturator internus
- gemellus inferior
- obturator externus
- quadratus femoris
- SartoriusSartorius muscleThe Sartorius muscle – the longest muscle in the human body – is a long thin muscle that runs down the length of the thigh. Its upper portion forms the lateral border of the femoral triangle.-Origin and insertion:...
- Obturator externus
- Gluteus maximus
- of legHuman legThe human leg is the entire lower extremity or limb of the human body, including the foot, thigh and even the hip or gluteal region; however, the precise definition in human anatomy refers only to the section of the lower limb extending from the knee to the ankle.Legs are used for standing,...
at kneeKneeThe knee joint joins the thigh with the leg and consists of two articulations: one between the fibula and tibia, and one between the femur and patella. It is the largest joint in the human body and is very complicated. The knee is a mobile trocho-ginglymus , which permits flexion and extension as...
- Biceps femorisBiceps femoris muscleThe biceps femoris is a muscle of the posterior thigh. As its name implies, it has two parts, one of which forms part of the hamstrings muscle group.-Origin and insertion:It has two heads of origin;...
- Biceps femoris
- of eyeball (motion is also called "extorsion" or excyclotorsionExcyclotorsionExcyclotorsion is a term applied to the outward, torsional movement of the eye, mediated by the inferior oblique muscle of the eye. The inferior oblique muscle is innervated by cranial nerve III .- Pathophysiology :...
)- Inferior rectus muscleInferior rectus muscleThe inferior rectus muscle is a muscle in the orbit.-Actions:It depresses, adducts, and helps extort the eye.The inferior rectus muscle is the only muscle that is capable of depressing the pupil when it is in a fully abducted position....
- Inferior oblique muscleInferior oblique muscleThe Obliquus oculi inferior is a thin, narrow muscle placed near the anterior margin of the floor of the orbit.-Action:Its actions are lateral rotation, elevation and abduction of the eye....
- Inferior rectus muscle