9/23 Flashcards
APL origin
posterior radius, ulna, IO membrane
APL insertion
base of 1st metacarpal
APL innervation
PIN
EPB origin
posterior radius and IO membrane
EPB insertion
base of 1st proximal phalanx
EPB innervation
PIN
ECRL origin
lateral supracondylar ridge
ECRL insertion
base of 2nd metacarpal
ECRL innervation
radial
ECRB origin
lateral epicondyle
ECRB insertion
base of 3rd metacarpal
ECRB innervation
PIN
EPL origin
posterior middle ulna and IO membrane
EPL insertion
base of distal phalanx of thumb
EPL innervation
PIN
EDC origin
lateral epicondyle
EDC insertion
extensor expansion of digits 2-5
EDC innervation
PIN
EDM origin
lateral epicondyle
EDM insertion
extensor expansion of 5th digit
EDM innervation
PIN
ECU origin
lateral epicondyle
ECU insertion
base of 5th metacarpal
ECU innervation
PIN
EIP origin
posterior ulna and IO membrane
EIP insertion
extensor expansion of 2nd digit
EIP innervation
PIN
borders of snuffbox
floor: scaphoid, trapezium
radial: APL/EPB tendons
ulnar: EPL tendon
proximal: radial styloid process
extensor tendon zone 1
distal to or at DIP joint (terminal extensor tendon)
extensor tendon zone 2
middle phalanx
extensor tendon zone 3
PIP joint (central slip)
extensor tendon zone 4
proximal phalanx
extensor tendon zone 5
MCP joint (sagittal band)
extensor tendon zone 6
metacarpals
extensor tendon zone 7
wrist joint
extensor tendon zone 8
distal forearm
FCR origin
medial epicondyle
FCR insertion
base of 2nd metacarpal
FCR innervation
median
palmaris longus origin
medial epicondyle
palmarus longus insertion
flexor retinaculum, palmar aponeurosis
palmaris longus innervation
median
FDS origin
medial epicondyle
FDS insertion
middle phalanx
FDS innervation
median
FCU origin
medial epicondyle, olecranon, posterior ulna
FCU insertion
pisiform, hook of hamate, base of 5th metacarpal
FCU innervation
ulnar
FDP origin
proximal ulna, IO membrane
FDP insertion
distal phalanx
FDP innervation
AIN, ulnar
FPL origin
anterior radius
FPL insertion
distal phalanx of thumb
FPL innervation
AIN
opponens pollicis origin
flexor retinaculum, scaphoid/trapezium tubercles
opponens pollicis insertion
lateral 1st metacarpal
opponens pollicis innervation
recurrent branch of median nerve
APB origin
flexor retinaculum, scaphoid/trapezium tubercles
APB insertion
lateral side of base of proximal phalanx
APB innervation
motor recurrent branch of median nerve
FPB origin
flexor retinaculum, scaphoid/trapezium tubercles
FPB insertion
lateral side of base of proximal phalanx
FPB innervation
motor recurrent branch of median nerve
adductor pollicis origin
base of 2nd metacarpal, base and body of 3rd metacarpal, capitate
adductor pollicis insertion
medial side of base of proximal phalanx of thumb
adductor pollicis innervation
deep branch of ulnar nerve
palmaris brevis origin
transverse carpal ligament, palmar aponeurosis
palmaris brevis insertion
skin on ulnar border of palm of hand
palmaris brevis innervation
ulnar
abductor digiti minimi origin
pisiform
abductor digiti minimi insertion
ulnar side of base of proximal phalanx of little finger
abductor digiti minimi innervation
deep branch of ulnar nerve
flexor digitorum minimi brevis origin
flexor retinaculum, hook of hamate
flexor digitorum minimi brevis insertion
ulnar side of base of proximal phalanx of little finger
flexor digiti minimi brevis innervation
deep branch of ulnar nerve
opponens digiti minimi origin
flexor retinaculum, hook of hamate
opponens digiti minimi insertion
ulnar border of 5th metacarpal
opponens digiti minimi innervation
deep branch of ulnar nerve
lumbrical origin and insertion
FDP tendon, passes along radial side of MCP joint to insert into extensor expansion
what motion do the palmar interossei contribute to?
adduction
what motion to the dorsal interossei contribute to?
abduction
which branch of the median nerve is proximal?
palmar cutaneous
which branch of the median nerve is distal?
motor recurrent
carpal tunnel borders
floor: proximal carpal row
roof: transverse carpal ligament
radial: scaphoid/trapezium tubercles
ulnar: pisiform, hook of hamate
guyon’s canal borders
floor: transverse carpal ligament
roof: volar carpal ligament
radial: hook of hamate
ulnar: pisiform, abductor digiti minimi muscle belly
flexor tendon zone 1
distal to FDS insertion (jersey finger)
flexor tendon zone 2
FDS insertion to distal palmar crease/A1 pulley
flexor tendon zone 3
palm (A1 pulley to distal aspect of transverse carpal ligament)
flexor tendon zone 4
carpal tunnel
flexor tendon zone 5
anterior compartment of forearm
where does palmar cutaneous usually branch off the median nerve?
5 cm proximal to wrist crease