Download MBBS Anatomy PPT 102 Scapular Region Notes

Download MBBS (Bachelor of Medicine, Bachelor of Surgery) Human Anatomy ppt lectures Topic 102 Scapular Region Notes. - anatomy ppt free download human anatomy ppt lectures, medicine notes ppt, anatomy handwritten notes pdf, mbbs 1st year anatomy notes pdf download, best anatomy notes pdf, human anatomy notes pdf, anatomy easy notes pdf, anatomy notes online, anatomy short notes, Anatomy ppt, Powerpoint Presentations and lecture notes.

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