The Hand- Palastanga Flashcards
Movements in the hand are always accompanied by what other movement
Movement at the radiocarpal and intercarpal joints, due to their functional interdependence
Where lies the long axis of the hand
Through the middle finger and through the long axis of the forearm
What are the articular surfaces of the common carpometacarpal joint
Medial 4 metacarpals
Medial 3 carpals
Describe the capsule of the common carpometacarpal joint
Thickened to form the dorsal and palmar carpometacarpal ligaments
How stable is the carpometacarpal joint
Very
What movements are possible at the carpometacarpal joint
Very few, mainly small gliding
What type of joints are the intermetacarpal joints
Plane synovial
between 2nd, 3rd, 4th and 5th bases
The 1st carpometacarpal joint is of what classification
A synovial saddle
Between the trapezium and base of 1st metacarpal
How are movements of the thumb performed
At 90d to the other digits
i.e. flexion/ extension occurs in the plane of the hand and looks like add/ abduction
What is opposition of the thumb
When the distal pad of the thumb is brought against the distal pad of any of the digits
A combination of flexion/ abduction and rotation w
What type of joint is the metacarpophalangeal joitn
Synovial condyloid (same for fingers and thumb)
What movements are possible at the metacarpophalangeal joint
Flexion/ extension, add/abduction
Axial rotation is allowed in small degrees due to the laxity of the ligaments (this will be passive except at the little finger)
What type of joint are the interphalangeal joints
Synovial hinge
NB only one at the thumb and then 2 for the remaining 4 digits
What stabilises the metacarpophalyngeal joints of the fingers
The long flexor and extensor tendons
What movements are permitted at the interphalangeal joints
Flexion and extension only
