1. Hand & Wrist Muscular Anatomy
JOINTS & MUSCULAR ANATOMY
Hand & Wrist Muscular Anatomy

2. Write-Pair-Share
Write and draw all the anatomical structures of the hand and wrist that you can recall from previous lessons on paper
Share with a partner
Be ready to share with the class

3. Recognize the types of joints of the hand & wrist
Objectives
Recognize the types of joints of the hand & wrist
Recognize the relevant muscular anatomy for the hand & wrist

4. Terminology
Saddle joint: an articulation between concave and convex ends of bones
Gliding joint: a sliding articulation between two smooth bone surfaces

5. Joints of the Hand & Wrist
Radiocarpal joint (wrist joint)
Carpal joints
Metacarpophalangeal joints
Phalangeal joints
Proximal interphalangeal (PIP) joint
Distal interphalangeal (DIP) joint

6. Radiocarpal Joint
The articulation between the radius and the carpal bones
Type of joint: condyloid
Allows flexion, extension, ulnar and radial deviation, and circumduction

7. Carpal Joints Type of joint: gliding Stabilized by various ligaments
Allow limited movement

8. Metacarpophalangeal Joints
Articulation between the metacarpals and the phalanges
1st MCP (thumb) is a saddle joint
Allows flexion, extension, abduction, adduction and rotation

9. Metacarpophalangeal Joints
2nd through 5th MCP joints are condyloid joints
Allow flexion, extension, abduction, adduction and circumduction

10. Interphalangeal Joints
Type of joint: hinge
Allow flexion and extension
Two categories of phalangeal joints:
proximal
distal

11. Interphalangeal Joints
Proximal interphalangeal (PIP) joint is the articulation between the proximal & intermediate phalanges
Distal interphalangeal (DIP) joint is the articulation between the intermediate and distal phalanges
Exception: The thumb only has an interphalangeal joint (IP) joint because it has just 2 phalanges

12. Muscles of the Wrist Wrist flexors:
group of muscles located on the anterior part of the wrist
perform flexion of the wrist

14. Wrist Extensors Wrist extensors:
group of muscles located on the posterior part of the wrist
perform extension of the wrist

15. Muscles of the Fingers Finger flexors: Finger extensors:
muscles on the anterior part of the hand
perform flexion of the fingers
Finger extensors:
muscles on the posterior part of the hand
perform extension of the fingers

17. Why is knowing anatomy specifically important when evaluating a hand/wrist injury?