Wrist and Hand Joints

Anatomy and Physiology of Human Movement420:050

Wrist and Hand Joints Complex

29 bones ~ 29 joints > 30 muscles

Simplification Carpals Extrinsic muscles only 7 joints

Objectives 1. Be able to identify the bones of the wrist

and hand joints. 2. Be able to identify the wrist and hand joints 3. Be able to identify the landmarks of the

lower ulna and lower radius. 4. Be able to identify and describe the

movements of the wrist and hand joints. 5. Be able to identify and describe the general

attachments (distal/proximal), and movements of the wrist and hand joint muscles.

Wrist and Hand Joint Bones Radius Ulna Carpals Metacarpals Proximal phalanges Middle phalanges Distal phalanges

Middle?

Objectives 1. Be able to identify the bones of the wrist

and hand joints. 2. Be able to identify the wrist and hand joints 3. Be able to identify the landmarks of the

lower ulna and lower radius. 4. Be able to identify and describe the

movements of the wrist and hand joints. 5. Be able to identify and describe the general

attachments (distal/proximal), and movements of the wrist and hand joint muscles.

Wrist and Hand Joints Radiocarpal joint

Biaxial ball and socket Intercarpal joints

Gliding/nonaxial Carpometacarpal joints

Fingers – Gliding/nonaxial Thumb – Biaxial saddle

Metacarpophalangeal joints Fingers – Biaxial ball and socket Thumb – Uniaxial hinge

Proximal interphalangeal joints Fingers – Uniaxial hinge

Distal interphalangeal joints Fingers – Uniaxial hinge

Interphalangeal joint Thumb – Uniaxial hinge

Radiocarpal joint

Objectives 1. Be able to identify the bones of the wrist

and hand joints. 2. Be able to identify the wrist and hand joints 3. Be able to identify the landmarks of the

lower ulna and lower radius. 4. Be able to identify and describe the

movements of the wrist and hand joints. 5. Be able to identify and describe the general

attachments (distal/proximal), and movements of the wrist and hand joint muscles.

Bony Landmarks Styloid process of ulna Styloid process of radius

Objectives 1. Be able to identify the bones of the wrist

and hand joints. 2. Be able to identify the wrist and hand joints 3. Be able to identify the landmarks of the

lower ulna and lower radius. 4. Be able to identify and describe the

movements of the wrist and hand joints. 5. Be able to identify and describe the general

attachments (distal/proximal), and movements of the wrist and hand joint muscles.

Wrist and Hand Joint Movements Wrist flexion/extension Wrist abduction/adduction

Radial/ulnar deviation Wrist circumduction Finger flexion/extension Finger abduction/adduction Finger circumduction

Wrist and Hand Joint Movements Radiocarpal joint: Biaxial ball and

socketMovement: F/E, Abd/Add, Circ.

Intercarpal joints: NonaxialMovement: Linear gliding

Carpometacarpal joints (F): NonaxialMovement: Linear gliding

Carpometacarpal joint (T): Biaxial saddleMovement: F/E, Abd/Add, Circ.

Wrist and Hand Joint Movements Metacarpophalangeal joints (F):

Biaxial ball and socketMovement: F/E, Abd/Add, Circ.

Metacarpophalangeal joint (T): Uniaxial hingeMovement: F/E

Proximal interphalangeal joints: Uniaxial hingeMovement: F/E

Wrist and Hand Joint Movements Distal interphalangeal joints:

Uniaxial hingeMovement: F/E

Interphalangeal joint: Uniaxial hingeMovement: F/E