Starred Lecture Items L14 Flashcards
what ligament is involved in suprascapular nerve entrapment
transverse scapular ligament
what travels under the transverse scapular ligament
suprascapular nerve
what travels above the transverse scapular ligament
suprascapular artery
what muscles are enervated by the suprascapular nerve
infraspinatus and supraspinatus
what trunk is the shoulder not enervated by
inferior trunk (C8 T1)
what are the areas of entrapment related to thoracic outlet syndrome
between middle and anterior scalene
deep to pec minor
d/w clavicle and 1st rib
UE in hyperabduction
cervical rib
what is the dermatome for median nerve
palm, palm side 3 1/2 fingers, nail area of dorsal side
what is the dermatome for superficial radial
back of hand, back 3 1/2 fingers, NOT nails
what muscles form the common extensor group
ECRB, ECRL, ECU, extensor digitorum, EDM
what cord does radial n originate
posterior cord
radial nerve actions of the thumb
thenar extension and abduction
which thumb action would be impossible if radial nerve was cut
thumb extention
radial nerve entrapment areas in radial tunnel
arcade of froshe, distal edge of supinator muscle (not too impt)
what myotome does thumbs up action
c6
what injury of the wrist occurs if radial nerve is cut
wrist drop (can still move the wrist passively just cant actively raise it)
does the deep radial nerve (PIN) innervate any hand intrinsic muscles
no, radial nerve doesn’t innervate any hand intrinsic muscles
which long digit doesnt have a PAD attachment
3rd
does og branch of median nerve ennervate upper arm?
no
what does the AIN ennervate
3 deep layer muscles of the forearm (lateral half of FDP, FPL, PQ)
what muscles does the median nerve inervate
PT, FCR, PL, FDS
median nerve entrapment sites
pronator teres region
carpal tunnel
what travels through the carpal tunnel
median nerve, 10 tendons– 4 flexor superficialis, 4 flexor profundus, FCR, FPL
ape hand
median nerve injury
thumb rests in adduction
muscle wasting
hand of benediction
median nerve injury
cant flex thumb, index finger, middle finger when making a fist
ulnar nerve is intact so can flex ring and pinkie
what muscles do supination
supinator and biceps
main supinator
biceps
what space does axillary run through
QS
t/f the muscles of the thenar compartment all proximally attach at the triquetrum and scaphoid
false (triquetrum is on the ulnar side)
does the ulnar nerve innervate muscles in the upper arm
no
ulnar neuritis
numbness in 4th and 5th digits from increased pressure and tension on the ulnar nerve in the cubital tunnel w/ flexed elbow
ulnar transposition
surgical relocation of the ulnar nerve in the cubital tunnel
movement from the cubital tunnel to anterior to the medial epicondyle
superficial branch of ulnar nerve
deep branch of ulnar nerve
deep: everything in hand
superficial: everything else
guyons’ canal contents, borders
contents: ulnar nerve, ulnar artery
borders: pisiform, hook of hamate, roof (volar carpal ligament)
screen for ulnar nerve issues
crossing fingers, pulling piece of paper from between fingers
claw hand
ulnar nerve injury
pinkie and ring in flexion (ext superficialis is intact bc ulnar doesnt inervate), middle, index, and thumb in extension (bc ulnar nerve is affected)
what dermatome does ulnar nerve inervate
C8
superior trunk injuries (what spinal level, what causes)
MORE COMMON
“waiter’s tip”/ erb-duchenne palsy
C5 C6
injury happens from neck movements
inferior trunk injuries (what spinal level, what causes)
LESS COMMON
“Klumpke palsy”/paralysis, claw hand
C8, T1
UE pulled superiorly
what muscles do sock puppet
lumbricals, PAD, DAB
tenodesis and what spinal level
passive finger flexion with active wrist extension (C6)
of the following which doesnt distally attach to the extensor hood of any of the long fingers
extensor indicis
extensor digitorum
extensor carpi ulnaris
lumbricals
extensor carpi ulnaris
intrinsic plus position
MCP flexion
PIP/DIP extension
*sock puppet
intrinsic minus position
MCP hyperextension
IP flexion
*clawing of fingers
composite grasp pattern
maximal flexion of all digits
*wringing out towel
spherical grasp pattern
varied flexion of digits
*holding ball
hook grasp pattern and which tendon must be attached to do this
flexion of PIPs and DIPs
extension of MCPs
*carrying bucket
flexor digitorum profundus
cylindrical grasp pattern
midrange flexion of digits
*turning steering wheel
UE neural tension position arm on wall, turn head
median nerve
UE neural tension position OK sign upside down on eye
ulnar nerve
UE neural tension position grab hands behind back and stretch up
radial nerve
