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The Rotator Cuff

Slideshow: Rotator Cuff

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Page 1: Slideshow: Rotator Cuff

The Rotator Cuff

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The Shoulder Girdle consists of 2 bones

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The Scapula

The Shoulder Girdle consists of 2 bones

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The Scapula

The Clavicle

The Shoulder Girdle consists of 2 bones

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The Scapula

The Clavicle

The Shoulder Girdle consists of 2 bones

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The rotator cuff muscles surround the proximal

humerus and move the arm in different directions

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There are four rotator cuff muscles

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Anterior View

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Subscapularis

Anterior View

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Subscapularis

Anterior View

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Subscapularis

Arises from the anterior or ventral

surface of the scapula

Anterior View

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SubscapularisArises from the anterior or

ventral surface of the scapula

Anterior View

Attaches onto the lesser tuberosity of

the humerus

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SubscapularisArises from the anterior or

ventral surface of the scapula

Anterior View

Attaches onto the lesser tuberosity of the humerus

Internally rotates the arm

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SubscapularisArises from the anterior or

ventral surface of the scapula

Anterior View

Attaches onto the lesser tuberosity of the humerus

Internally rotates the arm

Supplied by Upper and Lower

Subscapular Nerves

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SubscapularisArises from the anterior or

ventral surface of the scapula

Anterior View

Attaches onto the lesser tuberosity of the humerus

Internally rotates the arm

Supplied by Upper and Lower Subscapular Nerves

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SupraspinatusArises from the supraspinous

fossa on the posterior or dorsal aspect of the scapula

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SupraspinatusArises from the supraspinous fossa on

the posterior or dorsal aspect of the scapula

Inserts onto the superior facet on the Greater

Tuberosity of the Humerus

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SupraspinatusArises from the supraspinous fossa on

the posterior or dorsal aspect of the scapula

Inserts onto the superior facet on the greater tuberosity of the

humerus

Abducts the Arm

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SupraspinatusArises from the supraspinous fossa on

the posterior or dorsal aspect of the scapula

Inserts onto the superior facet on the greater tuberosity of the

humerus

Abducts the Arm

Supplied by the Suprascapular

nerve

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SupraspinatusArises from the supraspinous fossa on

the posterior or dorsal aspect of the scapula

Inserts onto the superior facet on the greater tuberosity of the

humerus

Abducts the Arm

Supplied by the Suprascapular nerve

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Superior or bird’s eye view of shoulder joint

Right side

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Superior or bird’s eye view of shoulder joint

Anterior

Right side

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Superior or bird’s eye view of shoulder jointAnterior

PosteriorRight side

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Superior or bird’s eye view of shoulder jointAnterior

Posterior

Right side

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Superior or bird’s eye view of shoulder joint

Scapula

Anterior

Posterior

Right side

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Superior or bird’s eye view of shoulder joint

HumerusScapula

Anterior

Posterior

Right side

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Superior or bird’s eye view of shoulder joint

Scapula

Greater Tuberosity

Anterior

Posterior

Right side

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Superior or bird’s eye view of shoulder joint

Greater Tuberosity

Coracoid

Anterior

Posterior

Right side

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Superior or bird’s eye view of shoulder joint

Greater Tuberosity

Coracoid

Acromion

Anterior

Posterior

Right side

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Superior or bird’s eye view of shoulder joint

Greater Tuberosity

Coracoid

Acromion

Anterior

Posterior

Supraspinous Fossa

Right side

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Superior or bird’s eye view of shoulder joint

Greater Tuberosity

Coracoid

Acromion

Anterior

Posterior

SupraspinatusMuscle

Right side

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Posterior View

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Posterior View

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Posterior View

Infraspinatus

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Posterior View

Infraspinatus

Originates from the Infraspinous Fossa on

posterior or dorsal aspect of Scapula

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Posterior View

InfraspinatusOriginates from the Infraspinous Fossa on

posterior or dorsal aspect of scapula

Inserts onto the middle facet on the greater tuberosity of

the humerus

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Posterior View

InfraspinatusOriginates from the Infraspinous Fossa on

posterior or dorsal aspect of scapula

Inserts onto the middle facet on the greater tuberosity of the humerus

Externally rotates the arm

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Posterior View

InfraspinatusOriginates from the Infraspinous Fossa on

posterior or dorsal aspect of scapula

Inserts onto the middle facet on the greater tuberosity of the humerus

Externally rotates the arm

Supplied by Suprascapular

Nerve

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Posterior View

InfraspinatusOriginates from the Infraspinous Fossa on

posterior or dorsal aspect of scapula

Inserts onto the middle facet on the greater tuberosity of the humerus

Externally rotates the arm

Suprascapular Nerve

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Posterior View

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Posterior View

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Posterior View

Teres Minor

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Posterior View

Teres Minor

Originates from the superior part of lateral border of

scapula

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Posterior View

Teres MinorOriginates from the superior part of lateral

border of scapula

Inserts onto the inferior facet on

greater tuberosity of humerus

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Posterior View

Teres MinorOriginates from the superior part of lateral

border of scapula

Inserts onto the inferior facet on greater tuberosity of humerus

Externally rotates the arm

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Posterior View

Teres MinorOriginates from the superior part of lateral

border of scapula

Inserts onto the inferior facet on greater tuberosity of humerus

Externally rotates the arm

Supplied by Axillary nerve

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Posterior View

Teres MinorOriginates from the superior part of lateral

border of scapula

Inserts onto the inferior facet on greater tuberosity of humerus

Externally rotates the arm

Axillary nerve

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Summary of muscles

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SubscapularisOrigin Subscapular fossa of scapulaInsertion Lesser tuberosity of humerus

Action Internal rotation and adduction of the arm

Nerve Supply Upper and lower subscapular nerves (C5, C6 and C7)

Blood Supply Subscapular artery

Anterior Chest Wall

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Posterior Chest Wall

SupraspinatusOrigin Supraspinous fossa of scapula

Insertion Superior facet on greater tuberosity of humerus

Action Abduction of armNerve Supply Suprascapular nerve (C4, C5

and C6)Blood Supply Suprascapular artery

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Posterior Chest Wall

InfraspinatusOrigin Infraspinous fossa of scapulaInsertion Middle facet on greater

tuberosity of humerusAction Externally rotates armNerve Supply Suprascapular nerve (C5 and

C6)Blood Supply Suprascapular and circumflex

scapular arteries

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