Flashcards in Applied Kinesiology Deck (69)
Newton's 3 laws of motion
1) Law of inertia
2) Law of acceleration
3) Law of reaction
the study of the form, pattern, or sequence of movement without regard for the forces that may produce motion
the branch of mechanics that describes the effects of forces on the body
internal force is produced by...
e.g., the muscles
external force is produced by...
e.g., gravity's pull on the barbell
the law that states that a body at rest will stay at rest and that a body in motion will stay in motion (with the same direction and velocity) unless acted upon by an external force
law of intertia
the law that states that the force acting on a body in a given direction is equal to the body's mass multiplied by the body's acceleration in that direction
law of acceleration
the law that states that every applied force is accompanied by and equal and opposite reaction force (for every action there is an equal and opposite reaction)
law of reaction
a change in an object's position in relation to another object
4 types of motion
4) general plane
motion around a joint (fixed axis point)
object in motion is not tied down and moves in a straight line
mixture of rotary and translatory motions
motions at various joints that are simultaneously linear and rotary
the fixed point of a lever
T/F: The center of a joint acts as a fulcrum for rotary motion of the body segments.
T/F: To lessen the resistance as fatigue occurs, move the weight closer to the working joint.
T/F: A longer lever arm (for motive force) and a shorter lever arm (for resistance) creates a situation where less muscular force is required to lift the same weight.
T/F: Longitudinal muscles allow for slow contractions but large force contractions.
Fast/speedy contractions but small force contractions
the 4 articulations (joints) of the shoulder joint complex
1) scapulothoracic (S/T) articulation
2) acromioclavicular (A/C) joint
3) glenohumeral (G/H) joint
4) sternoclavicular (S/C) joint
the junction of the sternum and the proximal clavicle
sternoclavicular (S/C) joint
the junction of the acromion process of the scapula with the distal clavicle
acromioclavicular (A/C) joint
the ball-and-socket joint composed of the glenoid fossa of the scapula and the humeral head
glenohumeral (G/H) joint
the muscles and fascia connecting the scapulae to the thorax
scapulothoracic (S/T) joint
the most mobile joint in the body
glenohumeral (G/H) joint
the relationship where the G/H and S/T joints work together to produce coordinated flexion and extension in the sagittal plane and abduction and adduction in the frontal plane
anterior shoulder girdle muscles
pectoralis minor and serratus anterior
The serratus anterior works as a synergist with what muscle to produce upward rotation of the scapula?
posterior shoulder girdle muscles
trapezius, rhomboids, and levator scapulae