- triangular fibrocartilage complex - the medial proximal row & the distal ulna within medial aspect of wrist

First Carpometacarpal joint is what kind of joint? - is the most __ joint of the thumb & - consists of the articulation bw the base of the __ MC and the __ __ of the trapezium.

- sellar (saddle-shaped) - important - 1st & distal aspect

Lecture: Wrist & Hand Flashcards by Sonny D

Carpus (or wrist) comprises of __ bones, __ ligaments

- 26

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hand accounts for: \_\_% of upper limb fxn
thumb: \_\_%
index (2nd digit): \_\_%
middle (3rd digit): \_\_%
(3rd digit is \_\_\_ finger)

90%
40-50%
20%
20%
strongest

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what kind of joint is the distal radio-ulnar joint?

what does it unite?

double pivot joint

- distal radius, ulna and an articular disc (TFCC)

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Colle’s Fracture, aka?
fracture of?
__ angulation of distal fragment?

dinner fork fracture
radius
posterior

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Smith’s Fracture, aka?
fracture of?
__angulation of distal fragment?

reversed colle’s & garden spade
radius
anterior

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TFCC?

b/w?

triangular fibrocartilage complex

- the medial proximal row & the distal ulna within medial aspect of wrist

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primary fxn of the TFCC is to improve __ __ & to cushion against __ __.

joint congruency

- compressive forces

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proximal carpal row from lateral to medial:

scaphoid
lunate
triquetrium
pisiform

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distal carpal row from lateral to medial:

trapezium
trapezoid
capitate
hamate

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which carpal is a sesamoid bone?

-pisiform

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which carpal takes up 2 metacarpal bases?

-hamate

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which carpal is the most commonly fractured and largest in the proximal row?

-scaphoid

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radius articulates directly with?

-lunate & scaphoid

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which carpal is the largest of all carpal bones?

-capitate

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which carpal is the 2nd most commonly fractured, and why?

lunate

- b/c its in the middle, is takes the brunt of stress in the arch

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lunate, capitate and base of 3rd MC are covered by the __ __ __ __ tendon.
origin:
insertion:

extensor carpi radialis brevis
lateral epicondyle
base of 3rd metacarpal

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what kind of articulation is the mid carpal joints (lying bw the two rows of carpals) and why?

compound

- bc each row has both a concave & convex segment

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the proximal row of carpal is __ laterally & __ medially

convex

- concave

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stability of the CMC (carpometacarpal) joints is provided by:

-palmar and dorsal carpometacarpal and intermetacarpal ligaments

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the MCP joint allows for __ & __ and __-__ deviation, associated with a slight degree of __ __.

flexion & extension
medial-lateral
axial rotation

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First Carpometacarpal joint is what kind of joint?

is the most __ joint of the thumb &
consists of the articulation bw the base of the __ MC and the __ __ of the trapezium.

sellar (saddle-shaped)
important
1st & distal aspect

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Bennet’s fracture= fracture thru the __ of the 1st metacarpal neck with __ & __ displacement of the __.
(aka?)

-base
-dorsal & radial
-shaft
(post/lat. frx)

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metacarpophalangeal joint is what kind of joint?

-hinge

Bar Room Fracture= fracture of the __ or __ MC neck with __ displacement of the head.

4th or 5th

- anterior

Boxer's Fracture= fracture of the __ or __ MC neck with __ displacement of the head.

- 2nd or 3rd | - anterior

the PIP joint is a __ joint, capable of __ & __.

- hinge | - flexion & extension

the DIP joint (similar to PIP) but is less __ and allows some __.

- stable | - hyperextension

heberden's nodes: found on what fingers & where? size? nodules are?

- all except the thumb, DIP - 2-3mm in diameter - painless and motion is unlimited

heberden's nodes: localized? several joints more common in? during? mostly from? single joint more common in? mostly from?

- OA - women, menopause, hereditary - males, trauma

bouchard's nodes: which joint? | may indicate: primary & secondary?

- PIP - 1*=synovitis - 2*=RA (bilateral)

swan neck deformity: MOI? PIP is? DIP is?

- RA - deforms into hyperextension - is flexed

boutonniere deformity: what happened? PIP is? DIP is?

- slip of the extensor digitorum communis tendon is avulsed from insertion into the base of the middle phalanx - is flexed - is extended

the major ligaments of the wrist (carpal ligs) include the:

- palmar intrinsic ligs - volar extrinsic - dorsal extrinsic - & intrinsic ligs

which carpal ligaments provide the majority of wrist stability?

-extrinsic palmar ligaments

which carpal ligaments serve as rotational restraints, binding the proximal row into a unit of rotational stability?

-intrinsic ligaments

(1) medial & | (2) lateral collateral ligaments of the fingers are named?

- Grayson's | - Cleland's

Radiocarpal joint is formed by the large articular __ surface of the __ __ of the __, and __, and __ of the proximal carpal row, and the TFCC.

- concave - distal end - radius - scaphoid - lunate

Antebrachial Fascia is a __ __ tissue, "__", that encases the __ and maintains the relationships of the tendons that cross the __.

- dense connective - bracelet - forearm - wrist

Extensor Retinaculum prevents the tendons from "__-__", when tendons turn a corner at the wrist.

-bow-stringing

the tunnel-like structures formed by the extensor retinaculum and the underlying bones are called:

-fibro-osseous compartments

the extensor retinaculum compartments, from lateral to medial, contain the tendons of:

- abductor pollicis longus & extensor pollicis brevis - extensor carpi radialis longus & brevis - extensor pollicis longus - extensor digitorum & indicis - extensor digiti minimi - extensor carpi ulnaris

the flexor retinaculum transforms the carpal arch into a tunnel, through which pass the __ __ and some of the __ of the hand.

- median nerve | - tendons

Jersey finger is avulsion of the __ __ __ tendon. | moi=finger gets caught in an object and the actively __ __ joint is suddenly & forcibly __ resulting in a __.

- flexor digitorum profundus - flexed DIP - extended - rupture

proximally the flexor retinaculum attaches to the __ of the __ and the __.

- tubercle - scaphoid - pisiform

distally the flexor retinaculum attaches to the __ of __ and the __ of the __.

- hook hamate - tubercle - trapezium

carpal tunnel serves as a conduit for the __ nerve & __ __ tendons

- median | - nine flexor

what makes up the floor of the canal of the carpal tunnel?

-palmar radiocarpal ligament & -palmar ligament complex (*palmars make up the roof!*)

what makes up the roof of the canal of the carpal tunnel?

-the flexor retinaculum (transverse carpal tunnel)

what are the ulnar (medial) and radial (lateral) borders of the carpal tunnel?

- trapezium | - hook of the hamate

Tunnel of Guyon is a __ superficial to the __ __, located b/w the __ of __ and the __ bones.

- depression - flexor retinaculum - hook of hamate - pisiform

the roof of the tunnel of guyon is formed by:

- palmar (volar) carpal ligament - palmaris brevis muscle - palmar aponeurosis

the floor of the tunnel of guyon is formed by:

- flexor retinaculum (transverse carpal ligament) - pisohamate ligament - pisometacarpal ligament

Cyclist Hand= __ __ & __ compression injuries b/w the __ and __ of __. other activities to elicit similar probs?

- ulnar nerve & artery - pisiform - hook of hamate - crutch use & weight lifting

Palmar aponeurosis: __ fibrous structure, continuous with the __ __ tendon & fascia covering the __ & __ muscles.

- dense - palmaris longus - thenar & hypothenar

Dupuytren's contracture is a __ condition of the __ __ that results in __ formation or __ of the __, and which may ultimately cause finger __ __ (usually the _ or _ digit).

- fibrotic - palamar aponeurosis - nodule - scarring - aponeurosis - flexion contracture - 4th or 5th

palpation during Dupuytren's contracture reveals a __ __ over the __ tendon; __ extension of the finger raises the __ taut where it can be readily seen.

- hard cord - flexor - passive - cord