Upper Proximal Extremities Flashcards
Trapezius innervation
Spinal Accessory - CN XI and C3/C4 (some C2)
Trapezius Origin
occiput, lig nuchae, C7 spine
Trapezius Insertion
lat 3rd cavicle, acromion
Trapezius Action
scapular elevation, adduction, opposite rotation head, lat flex head ipsilateral
Rhomboid innervation
dorsal scapular n, C5
Rhomboids origin
spinous processes T2-5
Rhomboids insertion
medial border of scapula
Rhomboids action
scapular adduction, elevation, downward rotation
Levator scapulae innervation
dorsal scapular n, n to levator scapulae, (C3, C4), C5
Levator scapulae origin
C1-4 transverse processes
Levator scapulae insertion
medial border of scapula at superior angle
Levator scapulae action
scapular elevation
Serratus Anterior innervation
long thoracic nerve, C5/C6/C7
Serratus Anterior origin
ribs 1-9
Serratus Anterior insertion
ventral scapula at vertebral border
Serratus Anterior action
scapular protraction and securing medial border to thorax
Latissimus Dorsi innervation
thoracodorsal, C6/C7/C8
Latissimus Dorsi origin
lumbar fascia, iliac crest, ribs 9-12
Latissimus Dorsi insertion
medial humerus
Latissimus Dorsi action
shoulder IR, adduction, extension
Teres major innervation
lower subscapular, C5/6
Teres major origin
dorsolateral scapula
Teres major insertion
medial humerus
Teres major action
shoulder IR, adduction, extension
Pec major (clavicular) innervation
lateral pectoral, C5/6
Pec major (clavicular) origin
medial clavicle
Pec major (clavicular) insertion
greater tubercle humerus
Pec major (clavicular) action
shoulder flexion, IR, horizontal adduction
Pec major (sternal) innervation
medial pectoral, C7/8, T1
Pec major (sternal) origin
sternum, rib cartilages 1-6
Pec major (sternal) insertion
greater tubercle humerus
Pec major (sternal) action
depresses shoulder girdle, adducts arm to opposite iliac crest
Anterior deltoid innervation
axillary n, C5/6
Anterior deltoid origin
lateral clavicle
Anterior deltoid insertion
deltoid tuberosity of humerus
Anterior deltoid action
shoulder horizontal adduction, flexion, IR, “scaption”
Middle deltoid innervation
axillary, C5/6
Middle deltoid origin
acromion
Middle deltoid insertion
deltoid tuberosity of humerus
Middle deltoid action
shoulder abduction
Posterior deltoid innervation
axillary, C5/6
Posterior deltoid origin
spine of scapula
Posterior deltoid insertion
deltoid tuberosity of humerus
Posterior deltoid action
shoulder ext, horizontal abduction, ER
Supraspinatus innervation
suprascapular, C5/6
Supraspinatus origin
supraspinous fossa
Supraspinatus insertion
superior facet of greater tubercle of humerus
Supraspinatus action
shoulder abduction
Infraspinatus innervation
suprascapular, C5/6
Infraspinatus origin
infraspinous fossa
Infraspinatus insertion
middle facet of greater tubercle of humerus
Infraspinatus action
shoulder ER
Teres minor innervation
axillary, C5/6
Teres minor origin
lateral scapula
Teres minor insertion
lowest facet of greater tubercle of humerus
Teres minor action
shoulder ER
Subscapularis innervation
upper and lower subscapular, C5/6
Subscapularis origin
subscapular fossa
Subscapularis insertion
lesser tubercle of humerus
Subscapularis action
shoulder IR
Coracobrachialis innervation
musculocutaneous, (C5), C6, C7
Coracobrachialis origin
coracoid process
Coracobrachialis insertion
medial surface of humerus
Coracobrachialis action
shoulder flexion, adduction, horizontal adduction
Biceps innervation
musculocutaneous, C5/C6
Biceps origin
short head - apex coracoid process
long head- supraglenoid tubercle
biceps insertion
radial tuberosity
biceps action
elbow flexion, forearm supination, weak shoulder flexion
Brachialis innervation
musculocutaneous, radial, C5/C6, (C7)
Brachialis origin
anterior humerus
Brachialis insertion
tuberosity and coronoid process of ulna
Brachilais action
elbow flexion
Brachioradialis innervation
radial, C5/6
Brachioradialis origin
lateral supracondylar ridge humerus
Brachioradialis insertion
radial styloid
Brachioradialis action
elbow flexion
Triceps innervation
radial, (C6), C7, C8
Triceps origin
long head - infraglenoid tubercle
lateral head - lat/post humerus
medial head - med/post humerus
Triceps insertion
olecranon of ulna
Triceps action
elbow extension, shoulder ext/add (long head)