anatomy Flashcards
obturator nerve nerve roots
L2-4
femoral nerve nerve roots
L2-4
sciatic nerve nerve roots
L4-S3
LFCN nerve roots
L2-L3
ilioinguinal nerve roots
T12-L1
iliohypogastric nerve roots
T12-L1
genitofemoral nerve roots
L1-2
anatomy at suprascapular notch
superior transverse scapular ligament separates suprascapular artery superiorly and nerve inferiorly (army over navy - artery over nerve)
first bone to ossify
clavicle at 5 weeks
humeral head retroversion
30 degrees
humeral head height
5.6 cm above superior border of pec major tendon
what prevents AP displacement at the AC joint
AC ligaments
CC ligament locations relative to AC joint
conoid is more medial (45 mm from AC joint, stronger), trapezoid is more lateral (25 mm from AC joint)
borders of quadrangular space
superior - teres minor, inferior - teres major, medial - long head of triceps, lateral - humerus
contents of quadrangular space
axillary nerve, posterior humeral circumflex vessels
borders of triangular space
superior - teres minor, inferior - teres major, lateral - long head of triceps
contents of triangular space
circumflex scapular vessels
borders of triangular interval
superior - teres major, lateral - lateral head of triceps/humerus, medial - long head of triceps
contents of triangular interval
radial nerve and profunda brachii artery
trapezius innervation
cranial nerve XI (accessory nerve)
lat innervation
thoracodorsal nerve
rhomboids innervation
dorsal scapluar nerve
levator scapulae innervation
C3 and C4 nerves
pec major innervation
medial and lateral pectoral nerves
pec minor innervation
medial pectoral nerve
serratus anterior innervation
long thoracic nerve
deltoid innervation
axillary nerve
teres major innervation
lower subscapular nerve
subscap innervation
upper and lower subscapular nerves
supraspinatus innervation
suprascapular nerve
infraspinatus innervation
suprascapular nerve
teres minor innervation
axillary nerve
order of insertion at intertubercular groove
pec major most lateral, lat in the middle, teres major most medial
main blood supply to humeral head
anterolateral branch of anterior humeral circumflex artery
muscles innervated by radial nerve proper
triceps, anconeus, ECRL, ECRB, brachioradialis
muscles innervated by PIN
ED, supinator, EDM, ECU, APL, EPL, EPB, EIP
what nerve does posterior cutaneous nerve to the arm and forearm come from
radial nerve
which cord does the radial nerve originate from
posterior cord
where is the spiral groove safe zone in a posterior approach to the humerus
10 cm distal to lateral acromion, 10 cm proximal to lateral epicondyle
where does the radial nerve pierce the intermuscular septum?
never less than 7.5 cm above articular surface
primary static stabilizer to valgus stress at the elbow
medial/ulnar collateral ligament, anterior bundle most important
where does the LUCL attach distally
supinator crest
what is the ligament of struthers
attaches supracondylar process and medial epicondyle, site of compression for median nerve
biceps brachii insertion
ulnar margin of radial tuberosity, long head is proximal, short head is distal
first carpal bone to ossify
capitate at 1 year
when are anterior and posterior bands of UCL taut
0-60 = anterior, 60-120 = posterior
coracobrachialis innervation
musculocutaneous nerve
biceps brachii innervation
musculocutaneous nerve
brachialis innervation
musculocutaneous and radial
triceps innervation
radial nerve
pronator teres origin, insertion, innervation
origin medial epicondyle and coronoid, insertion midlateral radius, innervation median nerve
FCU origin, insertion, innervation
origin medial epicondyle and posterior ulna, insertion pisiform, innervation ulnar nerve
pronator quadratus innervation
AIN
brachioradialis origin, insertion, innervation
origin lateral supracondylar humerus, insertion lateral distal radius, innervation radial nerve
ECRL origin, insertion, innervation
origin lateral supracondylar humerus, insertion second metacarpal base, innervation radial nerve
ECRB origin, insertion, innervation
origin lateral epicondyle, insertion third metacarpal base, innervation radial nerve
anconeus origin, insertion, innervation
origin lateral epicondyle, insertion proximal dorsal ulna, innervation radial nerve
extensor digitorum origin, insertion, innervation
origin lateral epicondyle, insertion extensor aponeurosis, innervation PIN
EDM origin, insertion, innervation
origin common extensor tendon, insertion small finger extensor expansion over P1, innervation PIN
ECU origin, insertion, innervation
origin lateral epicondyle, insertion fifth metacarpal base, innervation PIN
what nerve does the lateral cutaneous nerve of the forearm come from?
musculocutaneous
terminal branches of upper trunk of brachial plexus
suprascapular nerve, nerve to subclavius