wrist and hand Flashcards
Types of manipulation tasks
- Non-Contact / Contact
- Prehensile / Non-prehensile
- No motion / Motion
- Motion within hand / Motion not within hand
- Motion at contact / No motion at contact
The challenge of hand movement
- Hand tasks require many complex variations of movement
- Hand tasks often require a high degree of precision
- Muscles in the hand create movements across multiple joints
- Some muscles move multiple digits
As a result some things that are going to be important include: - How much control we have over muscles
- How muscles work together as synergists and fixators
- How much feedback we get from muscles and skin
structure
functional requirements
Bones of the wrist and hand
tips
Distal phalanges
intermediate phalanges
proximal phalanges
metacarpals
carpals
wrist
Carpal bones
- Some Scaphoid
- Lovers Lunate
- Try Triquetrum
- Positions Pisiform
- That Trapezium
- They Trapezoid
- Cannot Capitate
- Handle Hamate
Interosseous membrane
- Made up of 5 ligaments
- Separates anterior and posterior compartments
- Site of attachment for a number of forearm
muscles - Helps to shift distally applied load from radius to
ulnar - Limits supination of forearm
Carpal tunnel
- Formed by Transverse carpal
ligament or Flexor retinaculum - Between Pisiform / Hamate and
Trapezium / Scaphoid - Pulley for long flexor tendons
- Stabilises arch of wrist
movements of the wrist
extension
flexion
radial deviation
ulnar deviation
pronation
supination
movements of the thumb
flexion
extension
abduction
adduction
opposition
movements of the fingers
hyperextension
extension
flexion
abduction
adduction
circumduction
little finger opposition
Joints of the wrist and hand
Radiocarpal joint
* Condyloid
* Flexion / Extension
* Abduction / Adduction
Joints of the wrist and hand
Carpometacarpal joints
* 1st CMCJ (Thumb)
* Saddle joint
* Flexion / Extension
* Abduction / Adduction
* Opposition
* 2nd-5th CMCJs (Fingers)
* Plane joints
* Minimal amounts of movement
* Flexion/Extension
Joints of the wrist and hand
Metacarpophalangeal joints
* Condyloid joints
* Flexion / Extension
* Abduction / Adduction
* Circumduction
Joints of the wrist and hand
Proximal interphalangeal joints
* Hinge joints
* Flexion / Extension
Distal interphalangeal joints
* Hinge joints
* Flexion / Extension
Thumb has only 1 IP joint
Describing movement
Elbow flexion
* Forearm Pronation
* Palmar surface visible
* Wrist in neutral
* 4th and 5th finger MCPJ flexion
* 4th and 5th finger PIPJ flexion
* 3rd finger extension & lateral abduction
* 2nd finger extension & abduction
* Thumb opposition
