Arm Flashcards
Coracobrachialis origin and insertion
O: coracoid process
I: Middle humerus
Coracobrachialis innervation
Musculocutaneous nerve
Coracobrachialis action
Flex and adduct arm
Brachialis origin and insertion
O: Distal anterior humerus
I: Ulnar tuberosity
Brachialis innervation
Medial - musculocutaneous nerve
Lateral - radial nerve
Brachialis action
flex forearm
Biceps brachi origin and insertion
Long head origin: supraglenoid tubercle
Long head insertion: radial tuberosity
Short head origin: coracoid process
Short head insertion: radial tuberosity
Biceps brachi innervation
musculocutaneous n.
Biceps brachi action
supinate and flex forearm
Triceps brachi (long head, lateral head, medial head) origin and insertion
Long head origin: infraglenoid tubercle
Long head insertion: olecranon
Lateral head origin: proximal posterior humerus
Lateral head insertion: olecranon
Medial head origin: distal posterior humerus
Medial head insertion: olecranon
Triceps brachi innervation
radial n.
Triceps brachi action
extends elbow
What CN does biceps reflex test
C5
What CN does brachoradialis reflex test
C6
What CN does triceps reflex test
C7
sensory deficit in proximal lateral arm indicates corresponding nerve/root lesion with which nerve?
axillary n. (C5)
sensory deficit in inferolateral and posterior arm indicates corresponding nerve/root lesion with which nerve?
radial n. (inferolateral cutaneous n. of arm, posterior cutaneous n. of arm) (C5, C6)
sensory deficit at medial arm indicates corresponding nerve/root lesion with which nerve?
medial cutaneous n. of arm (T1)
What does the deep artery (profunda brachi) run with?
radial nerve
What nerve is entrapped in cubital tunnel syndrome?
ulnar nerve
symptoms of cubital tunnel syndrome
numbness and tingling in ulnar distribution
decreased grip strength
in lateral epicondylitis (tennis elbow) which tendons are affected?
extensor tendons
Medial Ulnar Collateral Ligament Injuries are typically seen in what individuals?
overhead throwing athletes
what is Medial Ulnar Collateral Ligament injury
attenuation or rupture of the medial ulnar collateral ligament of the elbow leading to valgus instability
