Ch.7 Wrist & Hand Joints Flashcards
How many joints involve hand and wrist
More than 25
How many bones make up the wrist and hands?
29
What are the 29 bones?
• Radius and ulna
• 8 carpal bones
• 5 metacarpal bones
• 14 phalanges
Proximal row of carpal bones from radius to ulna side
• Scaphoid (boat-shaped/navicular)
• Lunate (moon-shaped)
• Triquetrum (three-cornered)
• Pisiform (pea-shaped)
Distal row of carpal bones from radius to ulna side
• Trapezium
• Trapezoid
• Capitate (head-shaped)
• Hamate (hooked)
Most often injured or carpal bones
Scaphoid
What fingers have 3 phalanges each?
Index, middle, ring finger
Bony landmarks of the humerus and the ulna
Humerus
• Medial epicondyle
• Lateral epicondyle
Ulna
• Coronoid process
Movement of radiocarpal joint
Flexion, extension, abduction, and adduction
The 3 joints in each finger
• Metacarpophalangeal (MCP)
joints
• Proximal interphalangeal (PIP)
joints
• Distal interphalangeal (DIP) joints
2 thumb joints and one of thumb
• Metacarpophalangeal (MCP)
joint
• Interphalangeal (IP) joint
• Carpometacarpal (CMC) joint of
thumb
Most common joint in the
body for osteoarthritis
Carpometacarpal (CMC) joint
of thumb
Movements of Carpometacarpal (CMC) joint of thumb
Abduction, adduction, flexion,
extension
Wrist movement: Movement of palm of hand toward anterior (volar) aspect of forearm
Flexion of wrist
Wrist movement: Movement of back of hand toward posterior (dorsal) aspect of forearm
Extension of wrist
Wrist movements: Movement of thumb side of hand toward lateral aspect or radial side of forearm
• Radial flexion
Abduction of wrist
Wrist movements: Movement of little finger side of hand toward medial aspect or
ulnar side of forearm
• Ulnar flexion
Adduction of wrist
Finger movements: Movement of the thumb across the palmar aspect
Opposition
Wrist movements: Movement of the thumb as it returns to anatomical position from opposition
Reposition
What nerves branches from the brachial plexus innervate wrist and hand muscles?
Radial, median, ulnar branch
