اناٹومی مطالعاتی نوٹ · Upper limb

Shoulder joint

A synovial ball-and-socket joint between the large head of the humerus and the shallow glenoid cavity. It trades stability for a very wide range of movement and depends on the rotator cuff muscles for its strength.

اہم نکات

• Ball-and-socket; shallow glenoid + labrum; lax capsule.
• Stability = rotator cuff (SITS); weakest part = inferior.
• Commonest dislocation: anterior–inferior → axillary nerve at risk.
• Abduction: supraspinatus 0–15°, deltoid after; scapula rotates 1° for every 2° at the joint.
• Long biceps tendon runs inside the joint, under the transverse humeral ligament.
• Nerves: axillary + suprascapular.
• Joint: from mesenchyme between bone ends.
• Synovial cavity forms in the middle layer.
• Synovial membrane: type A (phagocytic) + type B (secretory) cells.
• Joint surfaces: hyaline cartilage, no perichondrium.

اٹلس میں مکمل نوٹ میں یہ بھی شامل ہے

Relations · خصوصیات · Action · Nerve supply · Histology · Development · طبی اہمیت

مفت سائن اِن کریں تاکہ اسے 3D ماڈل پر دیکھیں، مکمل نوٹ پڑھیں اور اس پر سوالات کی مشق کریں۔

ماخذ

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 3, PDF pp. 303–306, 400–408
• Inderbir Singh’s Human Embryology, ch. 10, PDF p. 144
• BRS Cell Biology & Histology, 7th ed., ch. 7, PDF pp. 117–120, 131

upper limb سے مزید

• Sternoclavicular joint
• Subclavius
• Subscapular nerves
• Subscapularis
• Supinator
• Suprascapular nerve
• Supraspinatus
• Supratrochlear (cubital) lymph node
• Teres major
• Teres minor
• Thenar muscles
• Thoracodorsal nerve

پرائیویسی پالیسی · ڈیزائن: DATXOC LLC.