Anatomy and Biomechanicks MSK Flashcards
Arthrokinematics (árthroquinemériquis)
The movement between joint surfaces.
What are the 3 motions arthrokinematics?
Roll
Glide
Spin
Roll
consists of one joint surface rolling on another.
e.g. movement between the femoral and tibial articular surfaces of knee.
Glide
consists of a pure translatory motion of one surface gliding on another.
e.g. movement of the joint surface of the proximal phalanx (feilencs) at the head of the metacartal bone of the hand.
Spin
consists of a rotation of the movable component of the joint.
e.g. movement between joint surfaces of radial head with humerus.
Osteokinematics
movement between 2 bones.
Convex- concave rule
convex surface moves- surface and bone moves in the opposite direction.
concave surface moves - surface and bone slide in the same direction.
In the spine, the convex rule applies at the atlanto-occipital joint, Below the second vertebra, the concave rule applies.
Close-packed position
- lig. + capsule maximally tensed
- maximum contact area
- minimum mobility
- maximum stability
loose-packed position/ open-packed position/ resting
- lig+ capsule most relaxed
- minimal joint surface contact
- maximum joint play and mobilization.
Capsular patterns (képsolol pérans)
limitations of joint movement when the joint capsule is a limiting structure.
What are the normal physiological end-feel?
- Soft
- Firm
- Hard
Soft end-feel (normal)
occurs with soft tissue approximation.
Firm end-feel (normal)
capsular and ligamentous stretching.
Hard end-feel (normal)
when bone and/or cartilage meet.
Boggy (bógui)/ soft (abnormal (ébinormal) end-feels)
soft tissue (tixuu) edema(edíma)
swelling
synovitis (sainovairis)