Ch. 7 The Wrist and Hand Joints
The wrist permits ____ of flexion; ___ of extension; ___ of radial deviation; and __ of ulnar deviation
70-90 of flexion 65-85 of extension 15-25 of radial deviation 25-40 of ulnar deviation
The ulna ___ make contact with the carpals Hence the wrist joint is often called the __ joint.
DOES NOT radiocarpal
The carpal bones of the wrist
Scaphoid Lunate Triquetrum Pisiform Hamate Capitate Trapezoid
The thumb has a __ in its flexor tendon.
Sesamoid bone
Retinaculum
a thick band of fibrous tissue running transversely across the wrist
Metacarpophalangeal joints
condyle joint 0-40 of extension 85-100 of flexion
Wrist extension
extensor carpi ulnaris extensor carpi radialis extensor digitorum
Dorsal tendons are held in place by the ____ and palmar tendons are held in place by the __.
extensor retinaculum; flexor retinaculum
The wrist and hand joints involve the following
flexion, extension, abduction, and adduction of wrist/hand
Wrist medial deviation
flexor carpi radialis extensor carpi ulnaris
Wrist medial deviation
flexor carpi ulnaris extensor carpi ulnaris
Wrist flexion
flexor carpi ulnaris flexor carpi radialis flexor digitorum palamris longus
Interphalangeal joint
hinge joint 80-90 of flexion from neutral (full extension)
Metacarpophalangeal joint
hinge joint 40-90 of flexion from neutral (full extension)
Distal interphalangeal joint
hinge joint 80-90 of flexion from neutral (full extension)
Proximal interphalangeal joint
hinge joint 90-120 of flexion from neutral (full extension)
The ___ supports the rest of the forces from radius to hand.
lunate
Each finger has three joints
metacarpophalangeal joint proximal interphalangeal joint distal interphalangeal joint
Wrist extension
movement of back of hand and/or phalanges toward posterior or dorsal aspect of forearm.
Finger abduction
movement of fingers (or thumb) away from middle finger
Finger adduction
movement of fingers (or thumb) toward middle finger
Ulnar deviation of wrist
movement of little finger side of hand toward medial aspect or ulnar side of forearm
Wrist flexion
movement of palm of hand and/or phalanges toward anterior or volar aspect of forearm.
Thumb opposition
movement of thumb across palmar aspect to oppose any or all of the phalanges
Thumb reposition
movement of thumb as it returns to anatomical position from opposition with hand and/or fingers
Radial deviation of wrist
movement of thumb side of hand toward lateral aspect or radial side of forearm.
The wrist allows flexion, extension, abduction (__) and adduction (__) Motion occurs primarily between distal radius and proximal carpal row (scaphoid, lunate, and triquetrum)
radial deviation; ulnar deviation
_____ deviation occurs between the proximal and distal carpals The action of the carpals sliding over each other creates the movement. A form of __ joint
radial/ulnar gliding
Carpometacarpal joint
saddle joint 50-70 of abduction 15-45 of flexion 0-20 of extension
The __ supports most of the forces from radius to hand
scaphoid
Carpa bones form a __ creating the ___. Frequently a source of problems known as __.
three-sided arched; carpal tunnel carpal tunnel syndrome