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THE SCAPULAR REGION
Made by- SUNIDHI SHARMA
GUIDED BY- HOD of Anatomy
DR. Shahin multani ma'am
(BATCH 2020-21)
Deltoid
Origin
• Lateral third of clavicle, acromion
process, spine of scapula
Insertion
• Middle of lateral surface of shaft
of humerus
Nerve supply
• Axillary nerve C5, 6
Action
Middle fibers Abducts arm;
anterior fibers flex and medially
rotate arm;
posterior fibers extend and laterally
rotate arm
• Abduction from 15-90 degrees
Structures under cover of Deltoid
BONE- Upper part humerus, coracoid process
,greater tubercle, lesser tubercle Intertuberculus
sulcus
Bursa- Subdeltoid , subaccromial bursa
Muscles – attached around shoulder joint
vessel- Ant and Post circumflex humeral vessel
Nerves- Axillary
Supraspinatus
Origin
• medial 2/3 of Supraspinous
fossa of scapula
Insertion
• Greater tuberosity of humerus;
capsule of shoulder joint
Nerve supply
• Suprascapular nerve C 5, 6
Action
• Abducts arm and stabilizes
shoulder joint
• Initiation of abduction 0-15
degrees
Infraspinatus
Origin
• Medial 2/3 Infraspinous fossa
of scapula
Insertion
• Greater tuberosity of
humerus; capsule of shoulder
joint
Nerve supply
• Suprascapular nerve C 5, 6
Action
• Laterally rotates arm and
stabilizes shoulder joint
Teres minor
Origin
• Upper two thirds of
lateral border of scapula
Insertion
• Greater tuberosity of
humerus; capsule of
shoulder joint
Nerve supply
• Axillary nerve C5, 6
Action
• Laterally rotates arm and
stabilizes shoulder joint
Teres major
Origin
• Lower third of lateral
border of scapula
Insertion
• Medial lip of bicipital
groove of humerus
Nerve supply
• Lower subscapular nerve
C6, 7
Action
• Medially rotates and
adducts arm and
stabilizes shoulder joint
Subscapularis
Origin
• Medial 2/3 subscapular
fossa
Insertion
• Lesser tubercle of humerus
Nerve supply
• Upper and lower
subscapular nerves C5, 6, 7
Action
• Medially rotates arm and
stabilizes shoulder joint
Rotator Cuff
Arterial Anastomosis Around the
Shoulder Joint
• The extreme mobility of the
shoulder joint may result in
kinking of the axillary artery and
a temporary occlusion of its
lumen
• To compensate for this, an
important arterial anastomosis
exists between the branches of
the subclavian artery and the
axillary artery
• ensuring that an adequate blood
flow takes place into the upper
limb irrespective of the position
of the arm
85 SCAPULAR REGION.pptx
85 SCAPULAR REGION.pptx
85 SCAPULAR REGION.pptx

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85 SCAPULAR REGION.pptx

  • 1. THE SCAPULAR REGION Made by- SUNIDHI SHARMA GUIDED BY- HOD of Anatomy DR. Shahin multani ma'am (BATCH 2020-21)
  • 2.
  • 3.
  • 4. Deltoid Origin • Lateral third of clavicle, acromion process, spine of scapula Insertion • Middle of lateral surface of shaft of humerus Nerve supply • Axillary nerve C5, 6 Action Middle fibers Abducts arm; anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm • Abduction from 15-90 degrees
  • 5. Structures under cover of Deltoid BONE- Upper part humerus, coracoid process ,greater tubercle, lesser tubercle Intertuberculus sulcus Bursa- Subdeltoid , subaccromial bursa Muscles – attached around shoulder joint vessel- Ant and Post circumflex humeral vessel Nerves- Axillary
  • 6.
  • 7. Supraspinatus Origin • medial 2/3 of Supraspinous fossa of scapula Insertion • Greater tuberosity of humerus; capsule of shoulder joint Nerve supply • Suprascapular nerve C 5, 6 Action • Abducts arm and stabilizes shoulder joint • Initiation of abduction 0-15 degrees
  • 8. Infraspinatus Origin • Medial 2/3 Infraspinous fossa of scapula Insertion • Greater tuberosity of humerus; capsule of shoulder joint Nerve supply • Suprascapular nerve C 5, 6 Action • Laterally rotates arm and stabilizes shoulder joint
  • 9. Teres minor Origin • Upper two thirds of lateral border of scapula Insertion • Greater tuberosity of humerus; capsule of shoulder joint Nerve supply • Axillary nerve C5, 6 Action • Laterally rotates arm and stabilizes shoulder joint
  • 10. Teres major Origin • Lower third of lateral border of scapula Insertion • Medial lip of bicipital groove of humerus Nerve supply • Lower subscapular nerve C6, 7 Action • Medially rotates and adducts arm and stabilizes shoulder joint
  • 11. Subscapularis Origin • Medial 2/3 subscapular fossa Insertion • Lesser tubercle of humerus Nerve supply • Upper and lower subscapular nerves C5, 6, 7 Action • Medially rotates arm and stabilizes shoulder joint
  • 13.
  • 14.
  • 15.
  • 16.
  • 17.
  • 18. Arterial Anastomosis Around the Shoulder Joint • The extreme mobility of the shoulder joint may result in kinking of the axillary artery and a temporary occlusion of its lumen • To compensate for this, an important arterial anastomosis exists between the branches of the subclavian artery and the axillary artery • ensuring that an adequate blood flow takes place into the upper limb irrespective of the position of the arm