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SHOULDER JOINT

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  • Type
  • Articular Surfaces
  • Ligaments
  • Relations
  • Blood Supply
  • Nerve Supply
  • Movements
  • Muscles producing move.
  • Applied

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Articular Surfaces

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Stability of joint.

  • Coracoacromial arch-Secondary socket.
  • Musculotendineus cuff.
  • Glenoidal labrum.
  • Muscles attaching humerus to the pectoral girdle.

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Ligaments of joint.

  • Capsular ligament.
  • Coracohumeral ligament.
  • Transeverse humeral ligament.
  • The glenoidal labrum.

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Ligaments-

Capsular Lig.

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Glenohumeral Lig.

Tx Humeral Lig.

Coracohumeral Lig.

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Glenoid labrum

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Bursae related to the shoulder joint.

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  • Sub-acromial (sub- deltoid).

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  • Subscapularis.

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  • Infraspinatus bursa.

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Ant.

Post.

subscapularis

supraspinatus

Relations

C-A arch

Long Tr.

Deltoid

Teres minor

Infraspina.

Del.

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Blood supply.

  • Anterior circumflex humeral vessels.
  • Posterior circumflex humeral vessels.
  • Suprascapular vessels.
  • Subscapular vessels.

Nerve supply.�

  • Axillary Nerve.
  • Musculocutaneous nerve.
  • Suprascapular nerve.

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ABDUCTION AT SHOULDER JOINT & ROTATION OF SCAPULA

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SCAPULO-HUMERAL RHYTHM – 1:2 RATIO

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Movements

Main muscles

Accessory muscles

Flexion

Pectoralis major-clavicular head

Deltoid-ant fibre

Corachbrachealis

Short head of biceps

Extension

Post fibre-deltoid

Latt.Dorsi

T.Major

Triceps-long head

P.Major-sternocostal head

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Adduction

P.Major

Latt.Dorsi

Biceps-short head

Triceps-long head

Teres Major.

Corachobrachialis.

Abduction

Deltoid

Supraspinatus

S.Ant

Trapezius

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Movements

Main muscles

Accessory muscles

Medial rotation

P.Major

Deltoid-ant.Fibre

Latt.Dorsi

T.Major

Subscapularis

Lateral rotation

Deltoid-post.Fibre

Infraspinatus

T.Minor

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Inferior dislocation of shoulder joint and axillary nerve injury

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FROZEN SHOULDER / Adhesive capsulitis

  • Painful and motionless shoulder because of inflammation
  • Capsule becomes inflamed – shoulder bones are unable to move freely in the joint
  • Mostly – unknown cause
  • Starts with pain – decreases movement – leads to stiffness and less motion
  • Self-limiting disease – pt improves within 2 years

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