Upper Extremity Flashcards
Origin of trapezius
Medial 1/3 superior nuchal line, EOP, nuchal ligament, CP C7-T12
Insertion of trapezius
Spine of scapula, acromion process, lateral 1/3 of clavicle
Innervation of trapezius
Spinal accessory nerve
Actions of trapezius
Elevation, retraction, depression, superior rotation of scapula
Origin of lats
SP of T7-L5, thoracolumbar fascia, iliac crest
Insertion of lats
Intertubercular groove of the humerus (medial portion)
Innervation of lats
Thoracodorsal nerve
Actions of lats
Extension, medial rotation, adduction of humerus
Origin of levator scapula
TP C1-4
Insertion of levator scapula
Superior border of medial border of scapula
Innervation of levator scapula
Dorsal scapular
Actions of levator scapula
Elevate scapula
Origin of rhomboid minor
SP C7-T1
Insertion of rhomboid minor
Medial border of scapula (level of the spine)
Innervation of rhomboid minor
Dorsal scapular nerve
Actions of rhomboid minor
Retract scapula, rotate glenoid cavity inferior
Origin of rhomboid major
SP T2-T5
Insertion of rhomboid major
Medial border of scapula
Innervation of rhomboid major
Axillary nerve
Actions of rhomboid major
retracts and downwardly rotates pec girdle
Origin of deltoid
Spine of scapula, acromion process, lateral 1/3 of the clavicle
Insertion of deltoid
Deltoid tuberosity of the humerus
Innervation of deltoid
Axillary nerve
Actions of deltoid
Extension, abduction, flexion of humerus
Origin of supraspinatus
Supraspinous fossa of scapula
Insertion of supraspinatus
Superior facet of greater tubercle of humerus
Innervation of supraspinatus
Suprascapular nerve
Action of supraspinatus
Abduction of humerus
Origin of infraspinatus
Infraspinous fossa of scapula
Insertion of infraspinatus
Middle facet on greater tubercle of humerus
Innervation of infraspinatus
Suprascapular nerve
Action of infraspinatus
Lateral rotation of humerus
Origin of teres minor
Middle portion of lateral border of scapula
Insertion of teres minor
Inferior facet of greater tubercle of humerus
Innervation of teres minor
Axillary nerve
Action of teres minor
Lateral rotation of humerus
Origin of subscapularis
Subscapular fossa
Insertion of subscapularis
Lesser tubercle of humerus
Innervation of subscapularis
Upper and lower subscapular nerve
Action of subscapularis
Medial rotation of humerus (assists with adduction)
Origin of teres major
Dorsal surface of inferior angle of scapula
Insertion of teres major
Intertubercular groove of humerus (medial portion)
Innervation of teres major
Lower subscapular nerve
Action of teres major
Adducts and medially rotates arm
Origin of serratus anterior
External lateral surface of ribs 1-8
Insertion of serratus anterior
Anterior portion of medial border of scapula
Innervation of serratus anterior
Long thoracic nerve
Action of serratus anterior
Protraction of scapula, stabilizes scapula against thoracic wall
Origin of subclavius
Costal junction rib 1
Insertion of subclavius
Middle and distal portion of clavicle
Innervation of subclavius
Nerve to subclavius
Action of subclavius
Stabilize and depress clavicle
Origin of pec major
Clavicular head: Anterior surface medial 1/2 of clavicle,
Sternocostal head: Anteriolateral sternum and upper 6 ribs
Insertion of pec major
Intertubercular groove of humerus (lateral portion)
Innervation of pec major
Lateral pectoral nerve to clavicular head, medial pectoral head to sternocostal head
Action of pec major
Adduction and medial rotation of humerus, flexion of humerus
Origin of pec minor
Ribs 3, 4, 5 near costocartilage junction
Insertion of pec minor
Coracoid process of scapula
Innervation of pec minor
Medial pectoral nerve
Action of pec minor
Protraction and depression of scapula
Origin of coracobrachialis
Coracoid process
Insertion of coracobrachialis
Medial surface of humerus
Innervation of coracobrachialis
Musculocutaneous nerve
Action of coracobrachialis
Flexion and adduction of humerus
Origin of biceps brachii
Short head: coracoid process
Long head: supraglenoid tubercle of scapula
Insertion of biceps brachii
Radial tuberosity and bicipital aponeurosis
Innervation of biceps brachii
Musculocutaneous nerve
Action of biceps brachii
Flexes and supinates forearm
Origin of brachialis
Distal 1/2 anterior surface of the humerus
Insertion of brachialis
Coronoid process and tuberosity of ulna
Innervation of brachialis
Musculocutaneous nerve
Action of brachialis
Flexion of forearm
Origin of triceps brachii
Long head: Infraglenoid tubercle
Lateral head: Posterior humerus
Medial head: Posterior humerus
Insertion of triceps brachii
Olecranon process of ulna
Innervation of triceps brachii
Radial nerve
Action of triceps brachii
Extension of forearm