PPT 8 Flashcards
scalenes purposeful activity
driving, deep breath with exertion (running or cycling)
anterior scalene action
neck lateral flexion
1st rib elevation during forced inhalation
anterior scalene SA
TP C3-C6
anterior scalene IA
1st rib
anterior scalene nerve innervation
cervical spinal nerve C4, C5, C6
middle scalene action
neck lateral flexion
1st rib elevation during forced inhalation
middle scalene SA
TP C5-C7
middle scalene IA
1st rib
middle scalene nerve innervation
anterior rami of cervical spinal nerves
posterior scalene action
neck lateral flexion
2nd rib elevation during forced inhalation
posterior scalene SA
TP C5-C7
posterior scalene IA
2nd rib
posterior scalene nerve innervation
anterior rami of cervical spinal nerves C7, C8
biceps brachii purposeful activity
combining hair, eating apple, washing face
biceps brachii action
elbow flexion
forearm supination
SHB resists shoulder dislocation
main contributor to elbow flexion when forearm is supinated
biceps brachii PA
SHB: coracoid process
LHB: supraglenoid tubercle
biceps brachii DA
radial tuberosity
forearm fascia via bicipital aponeurosis
biceps brachii nerve innervation
musculocutaneous nerve C5, C6, C7
coracobrachialis action
helps with…
arm flexion
arm adduction
resists shoulder dislocation
coracobrachialis PA
coracoid process
coracobrachialis DA
middle humerus
coracobrachialis nerve innervation
musculocutaneous nerve C5, C6, C7
brachialis action
elbow flexion (in all positions - strongest elbow flexor)
main contributor to elbow flexion when forearm is pronated
brachialis PA
distal anterior humerus
brachialis DA
ulnar tuberosity
coronoid process of ulna
brachialis nerve innervation
musculocutaneous nerve C5, C6
small branch from radial nerve C5, C7
brachioradialis action
elbow flexion (in mid-pronated/thumb up position)
assists to pronate and supinate forearm when these movements are resisted/from end range
main contributor to elbow flexion when forearm is mid-pronated
brachioradialis PA
lateral supra-epicondylar ridge of humerus
brachioradialis DA
lateral surface of distal radius proximal to styloid process
brachioradialis nerve innervation
radial nerve C5, C6, C7
triceps brachii action
elbow extension
LHT resists humerus dislocation
especially important during adduction
triceps brachii PA
long head: infraglenoid tubercle of scapula
lateral head: posterior surface of humerus (superior to radial groove)
medial head: posterior surface of humerus (inferior to radial groove)
triceps brachii DA
olecranon of ulna
triceps brachii nerve innervation
radial nerve C6, C7, C8
