Lab - Shoulder Anatomy Flashcards
Clavicle Actions?
Articulates w/ sternum (medially) and acromion (lateral)
Humorous parts?
Greater and lesser tubercle
Scapula actions?
Coracoid process, glenoid cavity, scapular spine, acromion
Sternum sections?
Manubrium, body, xiphoid process
Glenohumeral Joint facts?
Ball and socket joint
Deepened by glenoid labrum
High mobility, low stability
Sternoclavicular Joint type?
Saddle joint
Acromialclavicular joint type?
Plane joint
Separated shoulder injury
Scapulothoracic joint?
Articulation of scapula on the thoracic wall/ rib cage`
Ligaments of Shoulder?
anterior, middle, inferior, posterior glenohumeral ligs.
Coracohumeral lig. (strength superiorly)
Transverse humeral lig. (keeps LHB in bicipital groove)
Stabilizer Mscs in the shoulder?
Long head of Biceps (superior support)
Long head of triceps (inferior support)
Rotator cuff mscs
Posterior capsule of shoulder?
Provides stability and
Rotator Cuff mscs and job?
Active shoulder stabilizers
Also have individual actions
Sternoclavicular Joint ligs?
Interclavicular Lig.
Anterior/ posterior sternoclavicular ligs.
Costoclavicular Lig. (attaches each clavicle to first ribs)
AC Joint ligs.?
Superior, inferior, anterior, posterior AC ligs.
Coracoclavicular lig. (conoid and trapezoid, 2 parts)
Coracoacromial lig. (creates coracoacromial arch)
Major stabilizer mscs of the shoulder girdle?
Trapezius (upper, middle, lower)
Lats
Rhomboid major (T2-T6)
Rhomboid minor (T7-C1)R
Levator scapula
Rotator Cuff mscs (SITS)?
Superspinatus
Infraspinatus
Teres Minor
Subscapularis
stabilize humorous in glenoid w/ all mvms
Supraspinatus?
stabilize humorous in glenoid w/ all mvms
Abduction through first 15 degrees
Infraspinatus
stabilize humorous in glenoid w/ all mvms
ER
Teres Minor
stabilize humorous in glenoid w/ all mvms
ER
Subscapularis?
IR
Lats?
ER, Adduction
Pec Major
Flex, IR, Add
Deltoid
Anterior = Abduction, flex, IR
Middle = Abduction
Rear = Abduction, ext, ER
Teres Major
Ext, Add, IR
Coracobrachialis?
Flex, Add
Biceps BRachii?
Flex and supinate elbow
TRiceps Brachii?
ext of elbow
Rhomboids
Scapular adduction and downward rotation of scapula
Levator Scapulae?
Scapular elevation and side flexion of the neck if scar is fixed
Trapezius action?
Upper = scap elevation
Middle = Scap adduction (retraction)
Lower = Scap depression and rotation
Serratus Anterior?
Stabilize scap against thoracic wall and causes upward rotation and abduction during Scapulohumeral rhythm
Scapular Winging
Shoulder Bursae
Subacromial/ subdeltoid
- often gets compressed under coracoacromial arch
Shoulder Nerves?
Brachial Plexus
C5-T1
Dont memorize whole brachial plexus
focus on bottom three nerves
C5,6,7,8, T1 nerve roots form the plexus
At armpit –> becomes 5 n.
Musculocutaneous n.
Axillary n.
Radial n.
Median n.
Ulnar n.
Shoulder/ upper arm Arteries?
Subclavian a.
- Axiallry a. once in armpit
- Then becomes Brachial a.
- Then Radial/ ulnar a.
