Muscles of the wrist, fingers, and thumb Flashcards
the wrist is______kind of joint formed by ________
condyloid (ellipsoid) synovial joint
distal end of the radius and proximal carpal bones
the wrist joint allows what type of movement
flexion
extension
unlar deviation (adduction)
radial deviation (abduction)
interphalangeal joints are _______ types of joints and allow. ________ movement
hinge type synovial joints
flexion and extension
the carpometacarpal joint of the thumb is a ______ type of joint and allows for this movement
saddle type synovial joint
Movement:
flexion
extension
adduction
abduction
opposition
extrinsic muscles
muscles that have bellies in the forearm while the tensions cross the wrist or run all the way to the phalanges
benefit of extrinsic muscles
provide the benefit of giving a great deal of control over many different movements without having muscle bellies in the way of the moving bones
intrinsic muscles
muscles that are completely located on the hand
the extrinsic muscles that flex the wrist and fingers are located on the _____
anterior forearm
the extrinsic muscles that extend the wrist and fingers are located on the _____
on the posterior forearm
many flexors of the wrist and fingers share this common origin:
medial epicondyle of the humerus
3 principle flexors of the wrist
- flexor carpi radialis
- palmaris longus
- flexor carpi
two muscles that flex the fingers
flexor digitorum superficialis
flexor digitorum profundus
the extensors of the wrist are located…
posterior surfaces of the forearm
extensors of the wrist include
extensor carpi ulnas
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum
many of the extensors originate as the common extensor tendon which attaches to the
lateral epicondyle of the humerus
