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Horizontal abduction and horizontal adduction of the shoulder (transverse plane) Medial and lateral rotation of the shoulder (also known as internal and external rotation). Medial rotation is carried out by the anterior fibres of the deltoid, teres major, subscapularis, pectoralis major and the latissimus dorsi.
External rotation (lateral rotation or extorsion) is rotation away from the center of the body, [22] carried out by external rotators. Internal and external rotators make up the rotator cuff , a group of muscles that help to stabilize the shoulder joint .
Lateral rotation of the arm [16] The opposite of medial rotation of the arm. infraspinatus and teres minor, posterior fibers of deltoid Arm circumduction [17] Movement of the shoulder in a circular motion so that if the elbow and fingers are fully extended the subject draws a circle in the air lateral to the body.
Shoulder motions to pull the ligament taut Humeral head motion to pull the ligament taut Superior glenohumeral lig. Full adduction Inferior or anterior glide Middle glenohumeral lig. External rotation Anterior glide Inferior glenohumeral lig. Anterior band Posterior band Abduction and external rotation Abduction and internal rotation Non specific
The muscles of internal rotation include: of arm/humerus at shoulder. Anterior part of the deltoid muscle [1] Subscapularis [1] Teres major [1] Latissimus dorsi [1] Pectoralis major [1] of thigh/femur at hip [2] Tensor fasciae latae; Gluteus generalis; Anterior fibers of Gluteus meralis; Adductor longus and Adductor brevis; of leg at knee [3 ...
They work in tandem with the posterior deltoid to externally (laterally) rotate the humerus, as well as adduction. Teres Minor can produce only very small scapular plane adduction during maximal contraction (Hughes RE, An KN 1996) with adductor moment arm of approximately 0.2 cm at 45° of shoulder internal rotation and approximately 0.1 cm at ...
Adduction is an anatomical term of motion referring to a movement which brings a part of the anatomy closer to the middle sagittal plane of the body. Upper limb [ edit ]
Sensation that the shoulder is slipping out of the joint during abduction and external rotation. [6] Shoulder and arm held in external rotation (anterior dislocation), or adduction and internal rotation (posterior dislocation). [6] Resistance of all movement. Numbness of the arm. Visibly displaced shoulder.