lecture 11: antebrachial extensors notes Flashcards
what is the lister’s tuubercle a pulley for
extensor pollicis longus
where is the lister’s tubercle
dorsal distal radius
proximal row of carpals (radial to ulnar side)
scaphoid
lunate
triquetrum
pisiform
distal carpal row (radial to ulnar side)
trapezium
trapezoid
capitate
hamate
what is the number 1 fracture of the carpal bone
scaphoid
what type of bone is the pisiform
sesamoid bone
how many metacarpals are there
5
how many phalanges are there
14
how many phalanges does the thumb have
2 phalanges (proximal and distal)
what is the structural classification of the distal radioulnar joint
pivot
what is the functional classification of the distal radioulnar joint
uniaxial
what are the movements of the distal radioulnar joint
pronation and supination
what are the supporting ligaments of the distal radioulnar joint
volar radioulnar ligaments
dorsal radioulnar ligaments
what is the structural classification of the radiocarpal joint
ellipsoidw
what is the functional classification of the radiocarpal joint
biaxial
what are the movements of the radiocarpal joint
flexion
extension
radial
deviation
ulnar deviation
what is the primary articulation between distal forearm and proximal carpal bones
radiocarpal joint
what is the structural classifcation of the midcarpal joint
ellipsoid
what is the functional classification of the midcarpal joint
biaxial
what is the movements of the midcarpal joint
flexion, extension , radial deviation , ulnar deviation and circumduction
what is the complex interaction with proximal row to perform global wrist and hand movements
midcarpal joint
the triangular fibrocartilage complex is the cushion between the
distal ulna and carpals
the triangular fibrocartilage complex is the stability on the
ulnar side of the wrist
what ligament helps with excessive supination and pronation
palmar radioulnar ligament
what are the movemetns of the carpometacarpal joint of the fingers
volar/dorsal gliding
what is the structural/functional classification of the carpometacarpal joint of the fingers
gliding
what is the structural classification of the metacarpophalangeal joints
ellipsoid
what is the functional classification of the metacarpophalangeal joints
biaxial
what are the movements of the MCP joints
flexion , extentsion, abduction, adduction
what movement of the MCP joints produce volvar gliding
flexion
what movement of the MCP joint produces dorsal gliding
extension
what is the structural classification ofthe interphalangeal joints
hinge
what is the functional classification of the interphalangeal joints
uniaxial
what are the movements of the interphalangeal joints
flexion and extension
how many IP joints of the thumb have
1
what is the structural classification of the carpometacarpal joint of the thumb
saddle
what is the functional classification of the carpomeacarpal joint of the thumb
biaxial
what are the movements of the classification of the carpometacarpal joint of the thumb
flexion, extension , abduction, adduction
the CMC joint is wha type of joint
basilar joint
which carpal bone articulates with the first metacarpal joint
the trapezium
where are the common extensor tendon injuires
thumb
long fingers
how many extensor tendon zones are there
8
where do the extrinsic muscles originate from
promixal to the wrist
the extrinsic muscles generate
greater force
where are the intrinsic muscles contained at
within the entire hand
what is the superficial group of the extrinsic extensor muscles
extensor carpi radialis longus
extensor carpi radialis brevis
extensor carpi ulnaris
extensor digitorum
extensor digiti minimi
what are the deep muscles of the extrinsic extensor muscles
extensor indicis
supinator
what are the out dropping from the deeep muscles of the extrinsic extensor muscles
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
the extensor carpi radialis longus and brevis start at at
lateral epicondyle
the extensor carpi radialis longus and brevis end at the
base of a metacarpal
what muscles are associated with tennis elbow
extensor carpi radialis longus
extensor carpi radialis brevis
where is the inflammation located for “tennis elbow”
periosteum at the lateral epicondyle
where does the extensor digitorum originate from
lateral epicondyle
where does the extensor carpi ulnaris start
lateral epicondyle
where does the extensor carpi radialis go to
the base of the 5th metacarpal
extensors of the thumb include
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
anatomical snuffbox consist of what muscles
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
what is the purpose of the extensor retinaculum
keeps tendons in place and seperates them inot 6 compartments
what is referred to as “texting thumb”
de quervain’s tenosynovitis
what is de quervain’s tenosynovitis
cumulative trauma disorder of tendons of 1st dorsal compartment
what muscles are apart of the first dorsal compartment
abductor pollicis longus
extensor pollicis brevis
what muscles are apart of the second dorsal compartment
extensor carpi radialis longus
extensor carpi radialis brevis
what muscles are apart of the 3rd dorsal compartment
extensor pollicis longs
what muscles are apart of the 4th dorsal compartment
tendon sheath for extensor digitorum and extensor indicis
what msucles are apart of the 5th dorsal compartment
extensor digiti minimi
what is the smiths fracture
volar displacement of distal radial bone
what is the colles’ fracture
dorsal displacement of distal radial bone
what side of the wrist does the surgery for distal radius fracture happen
volvar side always
what is the MOI for a scaphoid fracture
from a fall on a out stretched hand
what can a scaphoid fracture lead to
necrotic proximal fragment
