Intro to Kinesiology & Biomechanics

Question 1

Motion occurs in a plane about an axis

Answer 1

Sagittal plane: ML axis

Frontal plane: AP axis

Transverse Plane: superior/inferior (vertical axis)

Question 2

Arthrokinematic principles of movement

Answer 2

Convex-on-concave: roll and slide direction for convex member is opposite

Concave-on-convex: roll and slide direction for concave member is similar

Question 3

Close-packed positions

Answer 3

position of max congruency between articular surfaces, a joint’s close packed position is toward end ROM

Question 4

Open-packed positions

Answer 4

relatively slack, higher potential for accessory motion

Question 5

Kinetics

Answer 5

Forces are vector quantities, Scalar (magnitude only; speed), Vector (magnitude and direction; velocity)

Question 6

Torque

Answer 6

Determined by product of force and moment arm

Question 7

Load-Velocity Relationship

Answer 7

Higher load –> lower velocity

Question 8

Force-velocity relationship

Answer 8

Greater force production capacity in eccentric contraction

Question 9

Inertia

Answer 9

Body at rest (or constant velocity) doesn’t change unless acted upon by external force (or torque)

Question 10

Acceleration

Answer 10

Acceleration of a body is proportional to the force (or torque) causing it, occurs in the direction of application, and is inversely proportion to its own mass.

Question 11

Action-Reaction

Answer 11

All forces (or torques) have equal, and oppositely directed, forces (or torques)