Shoulder Joint (Synovial, Ball And Socket)

SHOULDER JOINT1(SYNOVIAL, BALL & SOCKET)ARTICULATION(A) HEAD OF HUMERUS (THE BALL] (LATERALLY) :-© Less than hemisphereand covered by.Directed - -Medially, backwards and slightly upwards.Hyaline CarbilageBGLENOD CAVITY OF SCAPULA (THE SOCKET) (MEDIALLY)4aDear shaped shallow cavity (narrow above but wide below)Deepend to the by a lip of fibrocartilage (labrum glenoidal) attachedCAPSULEmargins of glenoid carity.The capsular ligament enclose the jointATTACHMENTSSUPERIORLY):-Encroches upto base of coracoidINFRIORLY:- Blends head of with triceps the scapular origin of the longprocess to include supra-glenoid tuberosityMEDIALLY:- Attached and to circumference of glenoid cavity ofLATERALLYScapula Attached to glenoidal labrim as its margin.DIPANKARRAY :- to (11) - is Medially- Humerus, (Anatomical Neck)Laterally. - Greater & lesser tubercles.SYNOVIAL MEMBRANE -lines inner surfaie of capsuleOPENINGS (PERFORATION OF THE CAPSULE)Human AnaromyANTERIOR PERFORATION :- (Just below coracoid process ForExamJoint cavity communicates with subscapular bursa(Deep to tendon ofsubscapularis Musde)LATERAL PERFORATION -(Anterolaterally, between greater & lesser tubercle)Passage of long head of Biceps.POSTERIOR PERPORATION [Posterolateral part of Capsule (Occasionally)aThrough deep to it the synovial supraspinatus membrane tendon. protrudes forming bursa SHOULDER JOINT2LIGAMENTSHuman AnaromyRACO-HUMERAL LIGAMENTFor Exam.Adherent to upper surface of Capsule)Medially Attached :- Lateral border of root of coracoid processLaterally Attached:- Front of greater tuberosity (Humerus)GLENOHUMORAL LIGAMENTS(SUPERIOR, MIDDLE & INFRIOR)Thickered parts of the front of the capsule.Medially - Attached of to the upper part of the medial manginthe glenoid cavity & labrum glenoidaleSuperior & Middle ligaments - Attached to lesser tuberosity.Laterally - -Inferior ligaments - Attached to lower part of Anatomical neckTRASVERSE HUMERAL LIGAMENT(Transverse band bridging over theAttached between greater & lesser tuberosities of the humerus.upper part of bicipinal groove)Acts as a retinaculum holding the tendon of the longhead of biceps in placeGLENOID LABRUM OF GLENOID(1) On Head of Humerus :- Thicker in centre than at periphery.LIGAMENT (Articular Hyojine Carbilage)(2) On Glenoid Cavity :- Thinner in centre than atBURSA (RELATED to THE JOINT)DIPANKAR RAY periphery.SUBSCAPULARBURSA :- Between subscapularis tindon and frontof the capsule of shoulder joint.2INFRASPINATUS BURSABetween tendon of infaspinatus muscle andthe back of capsule of shoulder joint.3SUBACROMIAL / SUBDELTOID BURSA Intervense between(a) Above Corasoarromial Tig & Acromion (b) Below - Supraspiratus Tendon+SUBCUTENEOUS BURSA :- Between upper surface of acromion & Skin5BURSA (May be present) :- Between coracoid process and capsuleof joint. SHOULDER JOINT3INTRA -CAPSULAR STRUCTURE1SYNOVIAL MEMBRANE2LABRUM GLENOIDALE3Tendon of Biceps LongSYNOYIAL MEMBRANEIntracapsulartread)Extrasynovial(1) the Lines the inner surface of capsule and is reflected on to(2) Through anterior perforation of Capsule - communicates withintracapsular part of surgical neck.(3)sheath Envelops which tendon comes out of long of capsule head of through Biceps Lateral forming tubularthesubscapularis bursa.EXTRA CAPSULAR STRUCTURE (RELATIONS)perforation.SUPERIORLYDIPANKAR RAYINFERIORLYANTERIORLYSupraspinatus M.POSTERIORLYAxillary N.Subacromial Bursa. Longheed-TriepSubscapularism.Coraroacromial Arch. Post humeralSubscapular BursaInfraspinatus M.DeltoidCircumflex A.Biceps - Short headTeres minorDeltoidDeltoidARTERIAL SUPPLYHuman Anatomy(1) Suprascapular AnteryFor Exam.NERVE SUPPLY2 Subscapular Artery(1) Axillary Neme(3) Ant Circumflex humeral Artery(2) Musculocuteneous Nerve.(4.3 Post Cxcurnflex humeral Antery(3) Suproscapular Nerve(4) Lateral pectoral Neme.