Presentation is loading. Please wait.

Presentation is loading. Please wait.

.  Sternoclavicular Joint Ligaments o Extremely weak because of boney arrangement o Anterior sternoclavicular Prevents upward displacement of clavicle.

Similar presentations


Presentation on theme: ".  Sternoclavicular Joint Ligaments o Extremely weak because of boney arrangement o Anterior sternoclavicular Prevents upward displacement of clavicle."— Presentation transcript:

1

2  Sternoclavicular Joint Ligaments o Extremely weak because of boney arrangement o Anterior sternoclavicular Prevents upward displacement of clavicle o Posterior sternoclavicular Prevents upward displacement of clavicle o Interclavicular Prevents lateral displacement of clavicle o Costoclavicular Prevents lateral and upward displacement of clavicle

3  Consists of Anterior, posterior, superior, and inferior portions  Coracoclavicular ligaments joins the coracoid process and clavicle helps maintain the position of the clavicle relative to the acromion  Coracoclavicular o Divided into Coniod and trapezoid ligaments  Coracoacromial ligament o Connects the coracoid to the acromion

4  Glenohumeral Joint Ligaments o Superior Ligament o Middle Ligament o Inferior Ligament  Produce major restraint in shoulder flexion, extension and rotation

5  Glenohumeral Joint Ligaments o Anterior Tense in extension, abduction or external rotation o Posterior Tension is in extension with external rotation o Middle Tension in flexion and external rotation o Inferior Tense in abduction, extended or externally rotated

6  Glenohumeral Ligaments o Inferior GH Ligament Primarily a check against both anterior and posterior dislocation of humeral head o Transverse ligament Retains the long biceps tendon within the bicipital groove

7  Dynamic motion  Establish stability to compensate for a great deal of mobility  Flexion, extension, abduction, adduction, horizontal adduction/abduction, internal/external rotation and circumduction

8  1 st group o Originate on axial skeleton o Attach to humerus Latissiumus dorsi Pectoralis major  2 nd group o Originates on scapula o Attach to humerus Deltoid Teres major coracobrachialis  Rotator cuff muscles o Subscapularis, supraspinatus, infraspinatus and teres minor Tendons adhere to the articular capsule and serve as reinforcing structures o Biceps and triceps Attach on the glenoid and effect elbow motion

9  Scapular Muscles o 3 rd group Levator scapulae Trapezius Rhomboids Serratus anterior o Important in providing dynamic stability to the shoulder complex

10  Most important Subacromial Bursa o Between coracoacromial arch and glenohumeral capsule o Reinforced by the supraspinatus tendon  Subacromial bursa o Easily subjected to trauma in overhead position o Compressed under coracoacromial arch

11  Spinal nerve roots o 5 th cervical vertebra through 1 st Thoracic vertebra Create the brachial plexus  Innervate muscles of upper extremity o Axillary (C5-C6) o Musculocutaneous (C5-C7) o Subscapular (C5-C6) o Suprascapular (C5-C6) o Dorsal scapular (C5) o Pectoral (C5-T1) o Radial (C5-T1)

12  Rotator Cuff Muscles o Subscapularis, infraspinaturs, supraspinatus and teres minor (along with long head of biceps) Provide dynamic stability Control position Prevent excessive displacement of the humeral head  Supraspinatus o Compresses humeral head  Infraspinatus, teres minor and subscapularis o Depress the humeral head during overhead movements

13  Glenohumeral joint capsule o As muscle contracts they dynamically tighten the joint capsule o Which helps center the humeral head to the glenoid  Dynamic movement and stabilization of shoulder o Also needs scapulothoracic, acromioclavicular and sternocalvicular joint to move as well

14  Muscles that produce movement of the scapula on the thorax help maintain the position of the glenoid relative to the moving humerus o Levator scapula and upper trapezius (elevate scapula) o Middle trapezius and rhomboids (adduct scapula) o Lower trapezius (adducts and depresses scapula) o Serratus anterior (abducts and upwardly rotates the scapula)

15  Describes the movement of the scapula relative to the movement of the humerus throughout a full range of abduction  Humerus elevates to 30 degrees: no movement of scapula o Setting phase  30 to 90 degrees: scapula abducts and upwardly rotates  90 degrees to full abduction: scapula abducts and upwardly rotates 1 degree for each 1 degree of humeral elevation  Clavicular movement must occur at both the SC and AC joints  Clavicle must elevate 40 degrees and rotate in a poster superior direction at least 10 degrees

16


Download ppt ".  Sternoclavicular Joint Ligaments o Extremely weak because of boney arrangement o Anterior sternoclavicular Prevents upward displacement of clavicle."

Similar presentations


Ads by Google