BMS 355 Wrist/Hand

interosseous border

keeps radius and ulna drawn together

medial

\n what side of the radius is the interosseous border

lateral

what side of the ulna is the interosseous border

ulnar notch

accepts head of ulna

lateral

scaphoid facet M or L

medial

lunate facet M or L

accept convex nature of scaphoid/lunate

scaphoid/lunate facet function

head of ulna/ulnar notch of radius/triangular fibrocartilage (TFC)

distal radioulnar joint articulations

lateral margin of radius to styloid process of ulna

TFC location

synovial pivot

distal radioulnar joint type

pronation/supination

distal radioulnar joint movements

biceps/supinator/pronator teres/pronator quadratus

muscles acting on the proximal/distal radio ulnar joints

biceps/supinator

muscles that supinate at the proximal/distal radioulnar joints

pronator teres/pronator quadratus

muscles that pronate at the proximal/distal radioulnar joint

pronation

when are the radius and ulna crossed over one another

palmar/dorsal radioulnar

distal radioulnar ligaments

stabilize the TFC (in pronation/supination)

function of palmer/dorsal radioulnar ligaments

superficial/deep portions

the palmar/dorsal radio ulnar joints have…

lateral radial margin to styloid process of ulna

superficial portion of palmar/dorsal radioulnar ligament attachments

lateral radial margin to fovea of ulna

deep portion of palmar/dorsal ligament attachments

branches from anterior/posterior interosseous aa (palmar/dorsal)/ ulnar a

blood supply for distal radioulnar joint

branches from anterior/posterior interosseous nn

innervation of the distal radioulnar joint

median n

what n does the anterior interosseous n come from

radial n

what n does the posterior interosseous n come from

triquetrum palmar surface

pisiform location

scaphoid/ lunate/ triquetrum/ pisiform

proximal row of carpals

trapezium/ trapezoid/ capitate/ hamate

distal row of carpals

scaphoid/ lunate/ triquetrum/ scaphoid and lunate facet of radius/ TFC

radiocarpal joint articulations

synovial condyloid

radiocarpal joint type

flexion/ extension/ abduction/ adduction/ **partial circumduction**

radiocarpal joint movements

palmar/ dorsal radiocarpal/ radial collateral

radiocarpal joint ligaments (lateral support)

resist hyperextension at RC

palmar radiocarpal ligament function

resist hyperflexion at RC

dorsal radiocarpal ligament function

resist hyperadduction at RC

radial collateral ligament or wrist function

styloid process of radius/ tubercle of scaphoid

radial collateral ligament of wrist articulations

palmar radius to proximal carpals

palmar radiocarpal ligament articulations

dorsal radius to proximal carpals

dorsal radiocarpal ligament articulations

palmar/ dorsal ulnocarpal/ ulnar collateral

radiocarpal joint ligaments (medial support)

styloid process of ulna/ pisiform/ triquetrum

ulnar collateral ligament of radiocarpal joint articulations

resist extension at RC on ulnar side

palmar ulnocarpal ligament function

resist flexion at RC on ulnar side

dorsal ulnocarpal ligament function

resist abduction at RC

ulnar collateral ligament of wrist function

flexor carpi radialis/ palmaris longus/ flexor carpi ulnaris

flexor muscles acting on radiocarpal joint

adduction/flexion at RC

flexor carpi radialis/ulnaris function

flexion at RC

palmaris longus function

extensor carpi radialis longus/ extensor carpi radialis brevis/ extensor carpi ulnaris

extensor muscles acting at radiocarpal joint

abduction/extension at RC

extensor carpi radialis longus/brevis function

adduction/extension at RC

extensor carpi ulnaris function

branches from anterior interosseous a/ radial and ulnar carpal branches/ metacarpal a (palmar/dorsal)

blood supply for radiocarpal joint

branches from anterior/posterior interosseous nn

innervation of radiocarpal joint

synovial gliding

intercarpal joint type

adjacent carpals within a row

intercarpal joint articulations

gliding/sliding

intercarpal joint movements

palmar and dorsal intercarpal/ interosseous

intercarpal joint ligaments (3)

maintain palmar arch of hand

intercarpal ligaments overall function

resist palmar forces at IC

dorsal intercarpal ligament function

resist dorsal forces at IC

palmar intercarpal ligament function

resist excessive slide/glide at IC

interosseous ligament of intercarpal joint function

plane/condyloid like

midcarpal joint type

proximal/distal carpal rows

midcarpal joint articulations

palmar/ dorsal intercarpal/ intercarpal collateral

midcarpal joint ligaments

glide/ slide/ limited flexion/ extension

midcarpal joint movements

maintain palmar arch of hand

midcarpal ligaments overall function

branches from radial/ ulnar aa/ anterior interosseous a

blood supply for intercarpal/midcarpal joints

branches from deep ulnar n/ anterior/ posterior interosseous nn

innervation of intercarpal/midcarpal joints

synovial condyloid

2-5 carpometacarpal joint type

distal carpals/ base of metacarpals

2-5 carpometacarpal joint articulations

palmar and dorsal metacarpal/ palmar and dorsal CMC/ interosseous CMC/ pisometacarpal

2-5 carpometacarpal joint ligaments

resist metacarpals from migrating away from midline

palmar and dorsal metacarpal ligament function

keep metacarpals drawn to metacarpals

palmar and dorsal CMC ligament function

resist dorsal forces

palmer CMC ligament function

resist palmar forces

dorsal CMC ligament function

distal carpals to palmar/dorsal surface of metacarpals

dorsal/palmar CMC ligaments articulations

maintain palmar arch

CMC ligaments/ pisometacarpal ligaments of CMC joint overall function

glue carpals to metacarpals

interosseous CMC ligament function

resist medial dislocation at CMC

pisometacarpal ligament function

glide/slide (limited flexion/extension)

2-5 carpometacarpal joint movements

synovial saddle

1st carpometacarpal joint type

trapezium/1st metacarpal

1st carpometacarpal joint articulations

palmar and dorsal metacarpal/palmar and dorsal CMC/interosseous CMC

1st carpometacarpal joint ligaments

longer

the palmar/dorsal metacarpal ligaments allow more movement because they are...

resist palmer/dorsal dislocation

palmar/dorsal CMC ligaments on 1st carpometacarpal joint function

draw trapezium to 1st metacarpal

interosseous CMC of 1st carpometacarpal joint function

circumduction

1st carpometacarpal joint movements

synovial condyloid

metacarpophalangeal joint type

head of metacarpals/ base of proximal phalanges

metacarpophalangeal joint articulations

radial/ ulnar collateral/ accessory collateral/ palmar/ deep transverse metacarpal/ digital fibrous sheath

metacarpophalangeal joint ligaments

circumduction with limits at 1st MCP joint

metacarpophalangeal joint movements

synovial hinge

interphalangeal joint type

base and head of articulating phalanges 2-5 proximal and distal

interphalangeal joint articulations

radial/ ulnar collateral/ accessory collateral/ palmar/ digital fibrous sheath

interphalangeal joint ligaments

flexion/extension at IP

interphalangeal joint movements

flexor digitorum superficialis/ flexor digitorum profundus/ flexor pollicis longus

superficialis/flexor digitorum profundus/flexor pollicis longus

flexors that work on the digits

proximal interphalangeal joint

what joint does flexor digitorum superficialis act on

distal interphalangeal joint

what joint does flexor digitorum profundus act on

first carpometacarpal joint/ 1st interphalangeal joint

what joints does flexor pollicis longus act on

middle

what tendon is flexor digitorum profundus in the finger

fork

what tendon is flexor digitorum superficialis in the finger

Flexor digitorum superficialis/ flexor digitorum profundus/ flexor pollicis longus tendons/ median n

carpal tunnel contents

flexor retinaculum

roof of carpal tunnel