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pp 1-50
O'Sullivan 2009
Question | Answer |
---|---|
What ribs does the scapula cover? | Ribs 2-7 |
Where does a clavicular fracture usually occur? | junction of the medial 2/3 and its lateral 1/3; medial to the attachment of the coracoclavicular ligament, especially in children and young adults |
Is the acromioclavicular or the coracoclavicular ligament usually involved in impingement? | go look it up p 42 |
What is a separated shoulder? | a ligamentous injury to the structure of the AC joint |
How many degrees of elevation occur at the glenohumeral joint during shoulder flexion or abduction? | 120 degrees of elevation occur at the GH joint |
How many degrees of elevation occur at the scapulothoracic articulation during shoulder flexion or abduction? | 60 degrees of elevation occur at eh scapulothoracic articulation during shoulder flexion or abduction |
How many degrees does the clavicle elevate during the first 90 degrees of shoulder abduction? | the clavicle elevates 35-45 degrees at the sternoclavicular joint during the first 90 degrees of shoulder abduction |
what two muscles act as primary movers to abduct the arm? | deltoid and supraspinatus |
When does the supraspinatus muscle act strongly? | the supraspinatus acts with the deltoid to abduct the arm and acts strongly when a heavy wight is carried with the arm abducted, carrying a suitcase |
Do the trapezius and serratus anterior cause upward or downward rotation of the scapula? | the trapezius and serratus anterior cause upward rotation of the scapula during arm elevation |
Do the rhomboids, levator scapulae, and pecoralis minor cause downward or upward rotation of the scapula? | downward rotation with purposeful shoulder extension, i.e. chopping wood |
Do the serratus anterior and pectoralis minor cause scapular protraction or retraction? | protraction |
Do the rhomboids, middle and lower trapezius cause protraction or retraction of the scapula? | retraction |
What motion do the upper trapezius and levator scapulae cause on the scapula? | they elevate the scapula |
what motions do the pectoralis minor and latissimus dorsi cause on the scapula? | depression |
What artery can be compressed by resting on crutches? | Compression of what nerve is the primary cause of 'crutch palsy'? |
What nerve innervates the serratus anterior? | the long thoracic (C5,6,7) |
What is the result of injury to the long thoracic nerve? | winging of the scapula |
What nerve innervates the levator scapulae and rhomboid muscles? | the dorsal scapular ( C5, 6) |
What is the result of injury to the dorsal scapular nerve? | impaired scapular retraction and downward scapular rotation |
what is the result of injury to the suprascapular nerve (C5, C6)? | injury to the suprascapular nerve from impingement by the superior transverse scapular ligament causes pain and decreased abduction and external shoulder rotation |
What important structure runs beneath the clavicle or pectoralis minor? | Brachial plexus; this is why postural dysfunction can cause brachial plexus injury. |
What is the carrying angle of the elbow? | 10-15 degrees in men, 20- 25 degrees in women, with the arm at the side. |
What muscles are the major elbow flexors? | brachialis, biceps brachii, and brachioradialis |
What is the MAIN elbow flexor muscle? | brachialis- works in pronation/supination/flexion/extension |
Over what weight does the biceps brachii kick in during supinated flexion? | The biceps brachii flexes when lifting greater than 2 pounds. |
What is the function of the brachioradialis muscle? | it stabilizes supination and pronation during strong resistance |
What is the major elbow extensor? | triceps brachii |
what does the anconeus muscle do? | assists the triceps in elbow extension and stabilizes during pronation and supination |
What two shoulder muscles can help facilitate elbow extension during closed chain activities like push-ups or pushing heavy objects? | pctoralis major and anterior deltoid muscles |
What artery can be palpated over the anterior region of the cubital fossa? | brachial artery: it is a continuation of the axillary artery |
What is a Volkman's ishemic contracture? | It is when there is an occlusion or laceration of the brachial artery that results in ischemia of the deep flexor muscles of the forearm, causing permanent shortening of the involved muscles. |
What is a Colles' fracture? | fracture of the distal radius caused by a FOOSH injury |
Name the carpal bones | Lateral to Medial (proximal row): Scaphoid, lunate, triquetrum, pisiform |
What is the most frequently fractured carpal bone? | scaphoid. poor blood supply and frequenctly develops avaxcular necrosis |
With what two carpal bones does the radius articulate? | Scaphoid and lunate |
What nerve can be compressed under the flexor retinaculum and cause carpal tunnerl? | median nerve |
How much wrist extension is needed for optimal use of the hand? | 20-30 degrees |
What motions are used in the power grip? | finger flexion, wrist extension, ulnar deviation |
Damage to what nerve affects the ability to maintain the functional wrist position and to release an object? | radial nerve |
Damage to what nerve affects flexion of the digits on the radial side of the hand and precision grip? | median |
damage to what nerve affects flexion of the ulnar side digits and power grip? | ulnar nerve damage |