Kinesiology Chapter 7 Wrist Hand Fingers Eaton Hand

Kinesiology Chapter 7

Wrist, Hand Fingers Eaton Hand Web Site Hand Kinesiology

Wrist Terms (matching) A. Digits or finger 1. 2. 3. 4. 5. 6. 7. Superficialis = Profundus = Carpi = Digitorum = Longus = Brevis = Pollex = B. Long C. Thumb D. Wrist E. Superficial F. Short G. Deep

Bone Overview

BONES of the WRIST and HAND ?

Phalanges • Distal – (further from the body) • Middle • Proximal – (closer to the body)

Metacarpals (1 through 5) 1 2 3 4 5

Carpal Bones Tp Tz S H C L Tq P

Carpal Bones Eight total Two rows Proximal (closer to the body) Distal (further from the body)

Carpal Bones

Carpal Bones

Carpal Bones (proximal row) 1. Scaphoid anatomical snuff box (boat shaped) articulates with radius 2. Lunate (moon shaped) articulates with radius 3. Triquetrum (Triquetral, Cuniform) articulates with radius 4. Pisiform (pea like) Compare to Fig 7. 1 (base of the hypothenar eminence; on top of triquetrum)

Carpal Bones (distal row) 1. Trapezium (Multagulum major) articulates with 1 st MC 2. Trapezoid (Multagulum minor) smallest of second row articulates with 2 nd MC 3. Capitate (Os Magnum) Largest carpal bone Articulates with 3 rd MC) 4. Hamate (Unciform, hook like) (Articulates with 4 th and 5 th MC) Compare to Fig 7. 1

Simplified Anterior/Palmar View of Right Hand thumb little finger Hamate Capitate Trapezoid Trapezium Pisiform Triquetrum Lunate Scaphoid

Review

Moving On…

Radius Head Radial tuberosity Styloid process

Ulna Styloid process

Styloid Process

Humerus Lateral epicondyle Medial epicondyle

Joints of the Wrist and Hand Interphalangeal Metacarpophalangeal Carpometacarpal • • • Intermetacarpal Midcarpal Intercarpal Radiocarpal

Assignment Be able to demonstration the movements of the fingers and of the wrist. Pages 129 -130

Movements of the Wrist (Radiocarpal) Flexion of the wrist Extension of the wrist Adduction or Radial Flexion of the wrist Abduction or Ulnar Flexion of the wrist

Movement of the Fingers (Interphalangeal Joints) Flexion of the fingers Extension of the fingers

Movement of the Fingers (Metacarpophalangeal Joint) Fingers – a. flexion – b. extension – c. abduction – d. adduction

The Carpometacarpal Joint of the Thumb (A Saddle Joint) Trapezium 1 St Metacarpal

Movements of the Carpometacarpal Joint of the Thumb • Extension – angle between thumb and index increasing (sideward movement) • Flexion – return from extension • Others

Movements of the Midcarpal (lst and 2 nd rows) and Intercarpal Joints (within rows). • No significant movement occurs at these joints

Name That Action

Actions

Actions

Actions Summary Fingers Flexion or Extension Adduction or Abduction Thumb Flexion or Extension Adduction or Abduction Wrist Flexion or Extension Adduction or Abduction

Assignment Be able to name one action of each wrist muscle Table 7 -1 (except Extensor Carpi Radialis Brevis, Extensor Pollicus Brevis, and Abductor Pollicus Longus)