KIN 245 Chapter 7: The Wrist and Hand Joints
Distal row from the radial to ulnar side
-trapezium:great multangular -trapezoid: lesser multangular -capitate: head shaped -hamate: hooked
following muscle does not perform wrist extension
abductor pollicis longus
movement of the back of the hand/or the phalanges toward the posterior or dorsal aspect of the forearm is termed
extension
which muscle may be palpated jut proximal to the dorsal aspect of the wrist
extensor carpi radialis longus
the _____ has the following attachment: origin: lateral epicondyle of the humerus, insertion: four tendons of the middle and distal phalanxes of the four fingers on the dorsal surface
extensor digitorum
the ____ has the following attachments: origin:medial epicondyle of the humerus, insertion:base of the second and third metacarpals on the palmar surface
flexor carpi radialis
what muscle performs adduction of the wrist
flexor carpi ulnaris
the _____ has the following attachments- origin: proximal three-fourths of the anterior and medial ulna, insertion:base of the distal phalanges of the four figners
flexor digitorum profundus
Origin of the flexor pollicis longus
middle anterior surface of the radius
Extension
movement of back of hand and or phalanges toward posterior or dorsal aspect of forearm.
Flexion
movement of palm of hand/or phalanges toward anterior or solar aspect of forearm
Opposition
movement of thumb across palmar aspect to oppose any or all of the phalanges
Reposition
movement of thumb as it returns to anatomical position from opposition with hand and or fingers
movement of the thumb across the palmar aspect to oppose any or all of the phalanges is termed
opposition
T/F: motions of the wrist joint include flexion, extension, abduction and adduction
true
T/F: only muscle involved in extending all of the metacarpophalangeal and interphalangeal joints of the four fingers is the extensor digitorum
true
T/F: ulnar flexion is movement of little finger side of hand toward medial aspect or ulnar side of the forearm
true
T/F:interphalangeal joints may be actively flexed to a greater degree with the wrist in slight extension as opposed to full flexion
true
Abductor Pollicis Longus muscle
-abduction of thumb at carpometacarpal joint -abduction wrist -extension of thumb at carpometacarpal joint -weak supination od forearm from a pronated position -weak flexion of wrist
key distal bony landmarks for muscles involved in wrist motion
-base of 2nd, 3rd, and 5th metacarpals, pisiform and hamate
key bony landmarks for finger muscle
-base of proximal, middle and distal phalanxes -base of 1st metacarpal, proximal and distal phalanxes of thumb
Extensor Digitorum muscle
-extension of 2nd, 3rd, 4th and 5th phalanges at metacarpophalangeal joints -extension of wrist -weak extension of elbow
Extensor Indicis muscle
-extension of index finger at metacarpophalangeal joint -weak wrist extension -weak supination of forearm a pronated position
movement of the fingers away from the middle finger is termed
abduction
movements of the extensor policies braves include extension of the thumb at the carp metacarpal and metacapophalangeal joints and wrist _____
abduction
Extensor digiti minimi muscle
-extension of little fingers at metacarpophalangeal joint -weak wrist extension -weak elbow extension
Extensor Pollicis Brevis muscle
-extension of thumb at carpometacarpal and metacarpophalangeal joints -weak wrist extension -wrist abduction
Extensor Pollicis Longus muscle
-extension of thumb at carpometacarpal, metacarpophalangeal and interphalangeal joint -extension of wrist -abduction of wrist -weak supination of forearm from a pronated position
Extensor Carpi Radialis Brevis
-extension of wrist -abduction of wrist -weak flexion of elbow
Extensor Carpi Radialis Longus muscle
-extension of wrist -abduction of wrist -weak flexion of elbow -weak pronation to neutral from a fully supinated position
Extensor Carpi Ulnaris Muscle
-extension of wrist -adduction of wrist together with flexor carpi ulnaris muscle
Fingers
-flex -extend -MCP joints also abduct and adduct
Wrist
-flexion -extension -abduction -adduction
Flexor Digitorum Profundus muscle
-flexion of 4 fingers at metacarpophalangeal proximal interphalangeal and distal interphalangeal joints -flexion of wrist
Flexor Digitorum Superficialis muscle
-flexion of fingers at metacarpophalangeal and proximal interphalangeal joints -flexion of wrist -weak flexion of elbow
Flexor Pollicis Longus muscle
-flexion of thumb carpometacarpal, metacarpophalangeal and interphalangeal joints -flexion of wrist -abduction of wrist
Flexor Capri Ulnaris muscle
-flexion of wrist -adduction of wrist together with extensor carpi ulnaris muscle -weak flexion of elbow
Palmaris Longus muscle
-flexion of wrist -weak flexion of elbow
Flexor Carpi Radialis muscle
-flexion of wrist -abduction of wrist -weak flexion of elbow -weak pronation of forearm
adduction: ulnar flexion
-movement of little finger side of hand toward medial aspect of ulnar side of forearm -movement of fingers toward middle finger
abduction: radial flexion
-movement of thumb side of hand toward lateral aspect or radial side of forearm -movement of fingers away from middle finger
Proximal row from the radial to ulnar side
-scaphoid: boat shaped, navicular -lunate: moon shaped -triquetrum: three cornered -pisiform: pea shaped
which muscle performs extension of the index finger
extensor indicis
the ____ has the following attachment: origin:posterior surface of the lower middle radius, insertion:base of the proximal phalanx of the thumb on the dorsal surface
extensor pollicis brevis
T/F: flexor digitorum superficialis performs its action int eh frontal plane
false