Shoulder complex
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This document describes the anatomy and biomechanics of the shoulder joint. It outlines the 3 anatomical and 2 functional joints of the shoulder, including their ligaments. It describes the rotary and translatory motions of each joint. It then focuses on the glenohumeral joint, detailing its bony landmarks, ligaments, muscles, and roles in movement. Specifically, it notes how the rotator cuff and long head of biceps work dynamically to balance the forces of the deltoid and gravity during arm movement.
Shoulder complex
- 3. 3 anatomical joints STERNOCLAVICULER JOINT ACROMIOCLAVICULER JOINT GLENOHUMERAL JOINT 2 functional joints SCAPULOTHORACIC JOINT SUPRAHUMERAL JOINT
- 6. ROTARY MOTIOS : ELEVATION AND DEPRESSION PROTRACTION AND RETRACTION ANTERIOR AND POSTERIOR ROTATION TRANSLATORY MOTIONS : MEDIAL AND LATERAL SUPERIOR AND INFERIOR ANTERIOR AND POSTERIOR
- 10. STRNOCLAVICULAR LIGAMENT COSTOCLAVICULAR LIGAMENT INTERCLAVICULAR LIGAMENT
- 14. ROTARY MOTIOS : INTERNAL AND EXTERNAL ROTATION UPWARD AND DOWNWARD ROTATION ANTERIOR AND POSTERIOR TIPPING OR TILTING TRANSLATORY MOTIONS : ANTERIOR AND POSTERIOR MEDIAL AND LATERAL SUPERIOR AND INFERIOR
- 19. SUPERIOR AND INFERIOR ACROMIOCLAVICULER LIGAMENT Resist small rotary and translatory motion The fibers of the superior acromioclavicular CORACOCLAVICULAR LIGAMENT This ligament is divided into a medial portion, Resist large rotary and translatory motion Limit upward rotation
- 24. ROTARY MOTIOS : UPWARD AND DOWNWARD ROTATION INTERNAL AND EXTERNAL ROTATION ANTERIOR AND POSTERIOR TIPPING OR TILTING TRANSLATORY MOTIONS : ELEVATION AND DEPRESSION PROTRACTION AND RETRCTION
- 36. ANGLE OF INCLINATION ANGLE OF TORSION
- 43. FLEXON-EXTENSION ABDUCTION-ADDUCTION MEDIAL-LATERAL ROTATION
- 52. BONES GLENOID LABRUM LIGAMENTS CAPSULES STATIC DELTOID MUSCLE ROTATOR CUFF MUSCLE SUPRASPINATUS MUSCLE LONG HEAD OF BICEPS BRACHII MUSCLE DYNAMIC
- 54. Increases the contact area between humeral head and scapula, by Maintaining -32 mmHg intra-articular negative pressure. Provides insertion for stabilizing structures (Capsule and
- 56. In a healthy glenohumeral joint, the capsule is airtight and there is negative when the arm is at the side the rotator interval capsule (superior
- 57. The majority of the force (Fx) of contraction of the deltoid causes the The inferior pull of gravity cannot offset the Fx component of the deltoid, Another force or set of forces must be introduced to work synergistically
- 58. SUPRASPINATUS (S) INFRASPINATUS (I) TERES MINOR (T) SUBSCAPULARIS (S)