lecture 12 muscular and articular systems Flashcards
Closed Kinetic Chain Occurs when the body moves over a _____
fixed distal segment
Open Kinetic Chain Occurs when the distal segment _____
moves in space
Open Kinetic Chain Motion at adjacent joints often ____
unpredictable
Advantages of Closed Kinetic Chain Tend to generate ____ _____forces through joints
stabilizing, compressive
Advantages of Closed Kinetic Chain Weight bearing positions stimulate _______
mechanoreceptors
Closed Kinetic Chain Mechanoreceptors activate _____ muscles promoting stabilization
synergistic
Closed Kinetic Chain enhance _____ thus enhancing neuromuscular control
proprioceptive feedback
Disadvantages of Closed Kinetic Chain Decreased ability to _____
isolate a single muscle group
Disadvantages of Closed Kinetic Chain Allows _____ of distal joints which is often key in athletic performance
minimal acceleration
Advantages of Open Kinetic Chain Muscle activity occurs predominately in prime mover thus easier to isolate _____
single muscle group
Advantages of Open Kinetic Chain Allows for free movement and ______
rapid acceleration of distal segment
Disadvantages of Open Kinetic Chain May introduce______ ______ across joints
shearing forces
Disadvantages of Open Kinetic Chain Less co-activation of agonistic _____ and _____
synergists and antagonists
Arthrokinematic Movements Small, involuntary movements between the _____
articulating joint surfaces
Arthrokinematic three Movements
roll, slide, spin
Arthrokinematic Movements all three movements happen during
knee extension
If convex surface moves over stationary concave surface, slide occurs in ____ as movement of bony lever
opposite direction
If concave surface moves over stationary convex surface, slide occurs in ____ as movement of bony lever
same direction
Conjunct Rotation This rotation (spin) tends to occur as bone moves near it’s _____
end ROM
Conjunct Rotation Involuntary arthrokinematic movement that occurs with another main movement at a joint
Closed Packed Joint Position Joint surfaces are _______
maximally congruent
Closed Packed Joint Position This is the position for ______
greatest stability of the joint
Open Packed Joint Position Joint surfaces are relatively_______ in relation to one another
free to move
Joint Play Refers to small amount of motion available within the joint which is not under ____
voluntary control
______ Used as an assessment technique to establish the integrity of joint capsule
joint play
If surrounding capsule and ligaments are too lax, joint may become _____
unstable