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The Rotator Cuff
The Shoulder Girdle consists of 2 bones
The Scapula
The Shoulder Girdle consists of 2 bones
The Scapula
The Clavicle
The Shoulder Girdle consists of 2 bones
The Scapula
The Clavicle
The Shoulder Girdle consists of 2 bones
The rotator cuff muscles surround the proximal
humerus and move the arm in different directions
There are four rotator cuff muscles
Anterior View
Subscapularis
Anterior View
Subscapularis
Anterior View
Subscapularis
Arises from the anterior or ventral
surface of the scapula
Anterior View
SubscapularisArises from the anterior or
ventral surface of the scapula
Anterior View
Attaches onto the lesser tuberosity of
the humerus
SubscapularisArises from the anterior or
ventral surface of the scapula
Anterior View
Attaches onto the lesser tuberosity of the humerus
Internally rotates the arm
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
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
SupraspinatusArises from the supraspinous
fossa on the posterior or dorsal aspect of the scapula
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
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
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
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
Superior or bird’s eye view of shoulder joint
Right side
Superior or bird’s eye view of shoulder joint
Anterior
Right side
Superior or bird’s eye view of shoulder jointAnterior
PosteriorRight side
Superior or bird’s eye view of shoulder jointAnterior
Posterior
Right side
Superior or bird’s eye view of shoulder joint
Scapula
Anterior
Posterior
Right side
Superior or bird’s eye view of shoulder joint
HumerusScapula
Anterior
Posterior
Right side
Superior or bird’s eye view of shoulder joint
Scapula
Greater Tuberosity
Anterior
Posterior
Right side
Superior or bird’s eye view of shoulder joint
Greater Tuberosity
Coracoid
Anterior
Posterior
Right side
Superior or bird’s eye view of shoulder joint
Greater Tuberosity
Coracoid
Acromion
Anterior
Posterior
Right side
Superior or bird’s eye view of shoulder joint
Greater Tuberosity
Coracoid
Acromion
Anterior
Posterior
Supraspinous Fossa
Right side
Superior or bird’s eye view of shoulder joint
Greater Tuberosity
Coracoid
Acromion
Anterior
Posterior
SupraspinatusMuscle
Right side
Posterior View
Posterior View
Posterior View
Infraspinatus
Posterior View
Infraspinatus
Originates from the Infraspinous Fossa on
posterior or dorsal aspect of Scapula
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
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
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
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
Posterior View
Posterior View
Posterior View
Teres Minor
Posterior View
Teres Minor
Originates from the superior part of lateral border of
scapula
Posterior View
Teres MinorOriginates from the superior part of lateral
border of scapula
Inserts onto the inferior facet on
greater tuberosity of humerus
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
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
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
Summary of muscles
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
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
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