Upper Extremity O/I/Act/N/A Flashcards
(35 cards)
Trapezius
O: occipital region and spines of C2-T12
I: lateral clavicle, acromion, and spine of Scapular
Act: elevates, upwardly rotate, retracts, and depresses Scapular and extends neck
Inn: spinal accessory N XI
Blood: transverse cervical A
Levator Scapulae
O: transverse processes of C1-C4 I: superior angle of Scapular Act: elevate and downwardly rotate Scapula, laterally flex neck Inn: dorsal Scapular N Blood: dorsal Scapular A
Rhomboid Minor
O: spines of C7-T1 I: superior vertebral border of Scapula Act: elevate, retract, and downwardly rotate Scapula Inn: dorsal Scapular N Blood: dorsal Scapular A
Rhomboid Major
O: spines of T2-T5 I: vertebral border of Scapula Act: elevate, retract, and downwardly rotate Scapula Inn: dorsal Scapular N Blood: dorsal Scapular A
Latissimus Dorsi
O: T7-S5 superior sacrum, iliac crest
I: inferior angle of Scapula, lat lip of the bicipital sulcus of humerus
Act: internally rotate, extend, and adduct shoulder; depress, retract, and downwardly rotate Scapula, and compress ribcage
Inn: thoracodorsal N
Blood: thoracodorsal A
Subscapularis
O: subscapular fossa I: lesser tubercle of anterior humerus Act: flex, adduct, and internally rotate shoulder Inn: upper and lower subscapular N Blood: subscapular A
Supraspinatus
O: supraspinous fossa of Scapula I: superior greater tubercle of humerus Act: abduct and externally rotate shoulder Inn: suprascapular N Blood: suprascapular A
Teres Minor
O: axillary border of Scapular
I: posterior greater tubercle of humerus
Act: externally rotates, extends, and adducts shoulder
Inn: axillary N
Blood: circumflex Scapular A
Teres Major
O: inferior angle of Scapula
I: lateral lip of the bicipital sulcus of humerus
Act: internally rotate, adduct, and extend shoulder
Inn: lower subscapular N
Blood: circumflex Scapular A
Infraspinatus
O: infraspinous fossa of Scapula I: posterior greater tubercle of humerus Act: externally rotates, adducts, and extends shoulder Inn: suprascapular N Blood: suprascapular A
Deltoideus
O: lateral clavicle, acromion, and spine of Scapula
I: deltoid tuberosity of humerus
Act: ANT: abduct, flex and internally rotate shoulder
SUP: abduct shoulder
POST: extends, abducts, and externally rotates shoulder
Inn: axillary N
Blood: anterior and posterior humeral circumflex
Serratus Anterior
O: anterolateral ribs 1-8 I: anterior vertebral border of Scapula Act: expands ribcage, protracts, upwardly rotates, depresses Scapula Inn: long thoracic N Blood: long thoracic A
Pectoralis Major
O: proximal half of clavicle, sternum, coastal cartilages 1-6
I: lateral lip of the bicipital sulcus of humerus
Act: internally rotates, adducts, and clavicular head flexes, expands ribcage
Inn: med and lateral pectoral Nn
Blood: thoracoacromial A
Pectoralis Minor
O: ribs 3-5 I: corocoid process of Scapula Act: protracts, depresses, downwardly rotates Scapular, expands ribcage Inn: medial pectoral N Blood: thoracoacromial A
Subclavius
O: junction of rib 1 and coastal cartilage I: inferior central clavicle Act: protract and depress clavicle Inn: subclavian N Blood: thoracoacromial A
Biceps Brachii Long and Short Heads
O Long: supraglenoid tubercle of Scapula
O Short: coracoid process of Scapula
I: radial tuberosity, bicipital aponeurosis of antebrachium
Act: flex elbow, supinate antebrachium, flex shoulder
Inn: musculocutaneous N
Blood: branches of axillary and brachial Aa
Coracobrachialis
O: coracoid process of antebrachium I: central medial humerus Act: flex and adduct shoulder Inn: musculocutanous N Blood: branches of axillary and brachial Aa
Brachialis
O: anterior humerus I: ulnar tuberosity and coronoid process Act: flex elbow Inn: musculocutaneous N Blood: branches of axillary and brachial Aa
Triceps Brachii Long, Medial , Lateral
O Long: infraglenoid tubercle of humerus
O Medial: posterior humerus inferior to the radial sulcus
O Lateral: posterior humerus superior to the radial sulcus
I: ulnar olecranon
Act: extend elbow, long head also extends and adducts shoulder
Inn: radial N
Blood: deep brachial A
Anconeus
O: lateral epicondyle of humerus I: lateral olecranon and posterior proximal ulnar shaft Act: extend elbow Inn: radial N Blood: deep brachial A
Flexor Digitorum Superficialis
O: common flexor tendon of the medial malleolus of humerus, coronoid process of ulna, proximal half of lateral radius
I: sides of middle phalanges of digits 2-5
Act: flex digits 2-5, flex carpus, flex elbow
Inn: median N
Blood: radial, ulnar, and anterior interosseus Aa
Flexor Digitorum Profundus
O: lateral and anterior ulnar and interosseus membrane
I: distal phalanges of digits 2-4 and distal tendon of flexor digiti minimi
Act: flex carpus, flex digits 2-4 and digit 5 via flexor digiti minimi tendon
Inn: median and ulnar Nn
Blood: radial, ulnar, and anterior interosseus Aa
Brachioradialis
O: lateral supracondylar ridge of humerus
I: lateral distal radius to styloid process of radius
Act: flex elbow, pronate and supinate antebrachium
Inn: radial N
Blood: radial, ulnar, and anterior interosseus Aa
Flexor Pollicis Longus
O: central anterior radius and interosseus membrane
I: base of distal phalanx of pollex
Act: flex pollex, flex carpus
Inn: median N
Blood: radial, ulnar, anterior interosseus Aa
