anatomy_of_shoulder_joint presentation.pptx

anatomy of the sholder joint

1. The Shoulder Joint By: Yasir Hussain DPT 4 th year Roll # 02

2. Intr o duction Enarthrodial or Ball-and-Socket joint Bo n e s I n v o l v e d H e a d of h ume r us G l e n o i d c a v it y of s c a p u l a Prot e c t e d a ga i n s t d i s p l a c e me n t by tendons and by atmospheric pressure . L i gam e n t s a ro u n d g l e n o - h ume r a l j o i n t ; Limit the amount of joint movement A b o v e pr o t e c t e d b y a rc h e d v a u l t formed by: U n d e r s u rf a ce of cor a c o i d p r o c e ss U n de r su r f a ce of ac r om i on pr o c e ss Cor a c o - a crom i a l l i gam e n t

3. Glenoid Cavity Pear Shape Shallow D i re c ted Laterally and Upward Onl y 1 / 3 rd of the humer a l head comes i n contact w i th the gleno i d ca v i ty at any position. Gleno i d Fos s a i s deepened by a fibro- cart ila g inou s r i m of Gleno i d labru m .

4. ARTICUL A TING SURFACE

5. Ligaments surrounding the shoulder joint Capsular Coracohumeral T r a n sv e rse Hume r a l Gl e n o i d L i gam e n t

6. GL E NOI D LA BRUM F i br o - cart i lag e rim at t ache d around ma rg i n of gle n o i d cavity. T h i ckest por t i on at circumference of ca v i t y , free ed g e i s sharp an d t h i n SYNOVIAL MEMBRANE Reflected from m a rg i n of gleno i d ca v i t y o v er f i bro - cart i la gi n ous r i m s u rround i ng i t. O v er i nternal s u rface of capsul a r l i ga ment s . Co v ers lowe r part an d s i de s of anato m i c a l ne c k of humerus .

7. BURSAE IN RELATION TO THE SHOULDER JOINT SUBSCAPULAR BURSA INFRASPINAT US BURSA SUBACR O MIAL BURSA (SUBDELTOID) SUBCORACOID BURSA

8. Muscles in Relation to the Joint A b o v e  Suprasp i natus Belo w  Long head of Triceps Front  S u bscapular i s Beh i nd  I nfrasp i natus and T eres M i nor Delto i d i s place d mo st externally an d co v ers the art i cul a t i on from i ts ou t er s i de , a s wel l a s i n front and behind.

9. Blood and Nerve Supply Blood Supply A n teri o r ci r cu m fl e x h u m e ral vessels Pos teri o r ci r cu m fl e x h u m e ral vessels Suprascapul a r v e s se l s NE R V E SUPP LY A x i ll ar y ne r v e Musc u l ocutaneous nerve Suprascap u l a r N e r v e La t eral pe c t o r al ne r v e

10. Summary on Should Joint Anatomy

11. MOVEMENTS AT THE SHOULDER JOINTS Movement in every direction Flexion extension abduction a d d uc t i o n R o t a ti o n c i rcumduc t i o n H i g h l y mob i l e due t o: Large size of head of Looseness of the capsule of the joint (Laxity of fibrous capsule)

12. Flexion Plane of Motion: Sa g i tt al P l ane Ax i s of Mot i on: T rans v e rse A xi s t hrou gh t he c e n t e r of t he humeral h e ad Mu scles I n v ol v ed: Pec t oris ma jor A n t e rior F i b r e s od D e l t oid Coraco-brachialis Bic e p s ( W h e n t he foreare i s f l e xed) H u mera l head gl i de s poster i or la t erally i n the gleno i d ca v i ty Range of Mot i on – 90 d e g r e e s

13. Extension Plane of Motion: Sa g i tt al P l ane Ax i s of Mot i on: T rans v e rse A xi s t hrou gh t he c e n t e r of t he hum e ral h e ad Mu scles I n v ol v e: L a t i s s i mus dorsi T e r e s major Po s t e rior f i ber s of De l t oid T riceps ( W h e n forearm i s e x t e nd e d) H u mera l head gl i de an t er i or med i al l y i n gleno i d ca v i ty Range of Mot i on – 4 5 d e g r e e s or 6 de g r e e s

14. Abduction Plane of Motion: F ront al P l ane Ax i s of Mot i on: S agi t t al ax i s t hrou gh t he c e n t e r of t he humeral h e ad Mu scles I n v ol v e: Deltoid Supraspinatus H u mera l head gl i de i nfer i orly i n gleno i d ca v i ty Range of Mot i on T o t al : – 165 d e g r e e s o r 175 d e g r e e s F u l l in t e rnal rot a t io n of hum e rus: – 60 degrees F u l l e x t e rnal rot a t i on of H umerus : – 90 degrees

15. Adduction Plane of Motion: F ront al P l ane Ax i s of Mot i on: Sa g i tt al a x i s t hrou gh t he c e n t e r of t he humeral h e ad Mu scles I n v ol v e: Subscapularis P e c t ora l i s Maj o r L a t i s s i mus dorsi T e r e s ma jor H u mera l head gl i de s u per i orly i n gleno i d ca v i ty Factors L i m i t in g : Trunk

16. Internal Rotation Plane of Mo t i on: Tra n s v er s e P l a ne A x i s of M o t i on: V er t i cal a x i s t hrough t he center of hu m eral head Mus c le s Inv ol v e: Subscapularis Pect or a li s Maj or Lat i ss i mus d o r s i T e res m a j or Humera l head gl i de pos t er i orlatera l l y i n gle n o i d cavity Range of Motion - 70 º a s t he a rm a t 90 º of s h o u l der a bduc t i on a nd 90 º e l bo w f l ex i on If the elbow is extended, shoulder rotation occu r s s i mu l t a n e ou s l y w i t h fore a rm rotation.

17. External Rotation Plane of Mo t i on: Tra n s v er s e P l a ne A x i s of M o t i on: V er t i cal a x i s t hrough t he center of hu m eral h e a d Mus c le s Inv ol v e: Infraspinatus T e res M i nor Humera l head gl i de an t er i omedi all y i n gle n o i d cavity Range of Motion - 90 º a s t he a rm a t 90 º of s hou lder a bduc t i on a nd 9 º e l bo w f l ex i on If the elbow is extended, shoulder rotation occu r s s i mu l t a n e ou s l y w i t h fore a rm rotation.

18. Circumduction A combination of flexion, abduction, extension, an d add u ct i on or i n the rev ersed sequence glenohumeral flexion  abduction  extension  adduction glenohumeral extension  abduction  flexion  adduction