Wrist and Hand Flashcards
Distal radius and ulna bony points
Radial and ulna styloid process, dorsal tubercle of radius, head of ulna
What is the triangular fibrocartilage complex?
A load bearing structure between the lunate, triauitreum and ulna head acting as a stabaliser for the ulnar aspect
Where is the pisiform located?
A sesamoid bone embedded in the tendon of the flexor carpi ulnaris on the palmar surface of the triquitreal
Which is the largest carpal?
Capitate
Which carpal articulates with MT IV and V?
Hamate
Which carpal is important for thumb mobility and has a tubercle?
Trapezium
Which is the most lateral, proximal carpal (has a tubercle)
Scaphoid
What type of joint is the radiocarpal and what are the articulations?
Synovial ellipsoid with two degrees of freedom, distal radius, triangular fibrocartilaginous disc, scaphoid, lunate and triquitreal
Which ligaments are at the RCJ?
Palmar and dorsal radiocarpal and radial collateral and ulnar collateral
What type of joint is the mid carpal joint and what are the articulations?
Synovial complex saddle with 2 degrees of freedom, proximal distal rows of carpal bones with joint capsule
Which ligaments are at the MCJ?
Intercarpal palmar, intercarpal dorsal, medial and lateral collateral
Which muscles produce flexion at the wrist and estimate degrees
85, flexor carpi ulnaris/radialis, palmaris longus, flexor digitorum superficialis/ profundus, flexor pollicis longus, MCJ 60
Which muscles produce extension at the wrist, estimate degrees
85, extensor carpi radialis longus and brevis, extensor carpi ulnaris, extensor digitorum, extensor digiti minimi, extensor indicis, extensor pollicis longus and brevis
Which muscles produce radial deviation, estimate degrees
15, flexor carpi radialis, extensor carpi radialis longus and brevis, abductor pollicis longus, extensor pollicis brevis
Which muscles produce ulnar deviation, estimate degrees
45, flexor carpi ulnaris, extensor carpi ulnaris
Which type of joint is the first carpometacarpal joint and what are the articulations?
Synovial saddle with three degrees of freedom, trapezium and base of I
What ligaments are at the first CMC joint?
Radial CMC, anterior oblique, posterior oblique
Which muscles produce thumb flexion, estimate degrees
40-50, flexor pollicis longus and brevis
Which muscles produce thumb extension, estimate degrees
40-50, extensor pollicis longus and brevis
Which muscles produce thumb adduction, estimate degrees
80, adductor pollicis
Which muscles produce thumb abduction, estimate degrees
80, abductor pollicis
Which muscle produces thumb opposition?
Opponens pollicis
Which type of joint is the intercarpal joint and what are the articulations and movements?
Synovial plane, between individual carpal bones, small glides (mainly capitate)
Which type of joint is the metacarpophalangeal and what are the articulations?
Synovial ellipsoid with two degrees of freedom, articulations between metacarpal head and base of phalanx
Which ligaments occur at the IC joints?
Dorsal palmar, intercarpal and interosseous
Which ligaments occur at the MCP joint?
Palmar, collateral, transverse metacarpal and deep transverse
Which type of joint is the interphalangeal?
Synovial hinge with one degree of freedom, proximal and distal
What are the ligaments at the interphalangeal joint?
Collateral and palmar ligaments
Which muscles produce finger extension?
Extensor digitorum, extensor digiti minimi, extensor indicis
Which muscles produce finger flexion?
Flexor digitorum superficialis, flexor digitorum profundus
Which muscles produce finger abduction?
Dorsal interosseous
Which muscles produce finger adduction?
Palmar interosseous
Which muscles produce movements in the little finger?
Flexion - flexor digiti minimi
Abduction - abductor digiti minimi
Opposition - opponens digiti minimi
Which muscles are innovated by the ulnar nerve?
Flexor digitorum profundus, adductor pollicis, interossei dorsal/palmar, flexor digiti minimi, flexor carpi ulnaris
Which muscles are innovated by the radial nerve?
Extensor digiti minimi
Which muscles are innovated by the median nerve?
Flexor digitorum profundus and superficialis, flexor pollicis longus and brevis, opponens pollicis, flexor carpi radialis longus and brevis, palmaris longus
Which muscles are innovated by the posterior interosseous nerve?
Extensor carpi ulnaris, extensor digitorum, extensor indicis, extensor pollicis longus and brevis, abduction pollicis
Which muscles are innovated by the lateral plantar nerve?
Abductor digiti minimi
