Shoulder Region
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What bone is holding the shoulder in place? | The joint between the sternum and clavicle
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| Name the bones of the shoulder | Clavicle, scapula and humerus
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| Where do the rotator cuff muscles start and end | Start on the scapula and end on the humerus. They are intrinsic muscles and have a little more to do with joint stability than the external ones
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| Where is there usually a fracture? | Where the shaft meets the humerus
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| How much of the humerus is in contact with the glenoid? | About 1/3 of the surface. There is fibrocartilage that goes around the glenoid and it is surrounded by a synovial membrane
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| Where does the tendon of the long head of the biceps attach? | Enters the joint space and attaches to the supraglenoid tubercle
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| Name the ligaments part of the intrinsic part of the fibrous joint capsule | Coracohumeral and Glenohumeral
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| Where is the humerus usually fractured? | At the surgical neck.
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| What does the spine of the scapula divide into? | The supraspinous and the infraspinous fossa
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| What type of motion is at the acromio clavicular joint? | Rotational. Allows the scapula to rotate/glide along the thoracic wall
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| True or False: Dirsupting a joint is harder to establish back than a bone | True
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| What should you think of when you think of synovial joint? (Clinically) | Arthritis
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| How can you tell the posterior from anterior surface of the clavicle? | Posterior surface is deepened and anterior surface is smooth
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| What does the costoclavicular ligament do? | Maintains the relationship between the clavicle and 1st rib and determines how fat the clavicle is able to move
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| What type of movement does the glenohumeral joint do? | Flexion and Extension
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| What is abduction and adduction? | Abduction: Moving away from midline. Adduction: Bringing it back to the body
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| How far do the extrinsic muscles go? | From torso to humerus
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| What does the pectoralis major rotate? | The humerus and rotator cuff muscles
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| What does the pectoralis minor stabilize? | The scapula. Pulls scapula down to hold it to chest wall
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| What other muscle holds the scapula against the wall? | Serratus anterior
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| What does the trapezius cranial nerve IV (accessory) do? | Has an antigravity effect. Descending: Elevates scapula. Ascending: Depresses Scapula. Middle: Retracts Scapula
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| What does the latissimus dorsi do? | Innervated by thoracodorsal nerve, it extends the arm and it is going to adduct. It also medially rotates
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| What do the rhomboids do? | Deep scapular nerve innervation. It does scapular retraction, rotates scapula (and glenoid) inferiorly. Holds scapula against chest wall (with serratus anterior).
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| What does the levator scapula do? | Elevates scapula and rotates scapula (and glenoid) inferiorly
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| What does concentric mean? Eccentric? | Coccentric: Everything is contracting. Eccentric: Means it's contracted, but lengthening
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| What does the deltoid do? | Abduction, medial and lateral rotation. Deltoid and Supraspinous both abduct humerus together
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| What does the rotator cuff muscles keep in place? | The humeral head
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| What does the teres major do? | Adduction and medial rotation
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| True or False: As long as you tie off the artery above the circumflex , arteries blood supply should not be disrupted | True
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| What is the teres minor innervated by? Teres major? | Teres Minor: axillary nerve. Teres major: Lower subscapular nerve
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