Intro to HMS
The collective components and structures that work together to move the body: muscular, skeletal, and nervous systems.
Human Movement System
Which plane of movement can be described as an imaginary line that bisects the body into right and left sides?
Sagittal
A motor neuron and all of the muscle fibers that it innervates.
Motor Unit
The primary muscles providing force for a movement.
Agonists
An influence applied by one object to another, which results in an acceleration or deceleration of the second object.
Force
A concept that describes the human body as a chain of interdependent links that work together to perform movement.
Kinetic Chain
An imaginary bisector that divides the body into front and back halves. Movement in the frontal plane includes abduction, adduction, and side-to-side motions.
Frontal
A muscle action that occurs when a muscle develops tension while lengthening.
ECCENTRIC
Muscles that assist agonists to produce a movement.
Synergists
The resting length of a muscle and the tension the muscle can produce at this resting length.
Length-tension relationship
The position with the body erect, the arms at the sides, and the palms forward. It is the position of reference for anatomic nomenclature.
Anatomic position
. Pronation of the foot describes what multiplanar movements?
Eversion, dorsiflexion, and ankle abduction
A muscle action that occurs when a muscle is exerting force greater than the resistive force, resulting in a shortening of the muscle.
CONCENTRIC
Muscles that contract isometrically to stabilize the trunk and joints as the body moves.
Stabilizers
The thin, stringlike, myofilament that acts along with myosin to produce muscular contraction.
Actin
The science concerned with the internal and external forces acting on the human body and the effects produced by these forces.
Biomechanics
In what plane of movement do shoulder horizontal adduction and abduction occur?
Transverse
When a muscle is exerting force equal to the force being placed on it leading to no visible change in the muscle length.
isometric muscle action
When a muscle is automatically activated in anticipation of a movement.
Feed-forward activation
The thick myofilament that acts along with actin to produce muscular contraction.
Myosin
What term is used to describe the concept of how the functioning of one body segment can impact other areas of the body?
Regional interdependence
What movement term is used to describe the concept of adducting the shoulder blades so that they become closer together?
Scapular retraction
During _____ muscle actions, the muscle shortens at a constant speed over the full ROM. An ________ requires the use of expensive and sophisticated equipment that measures the amount of force generated by the muscles
isokinetic
Muscles on the opposite side of a joint that are in direct opposition of agonist muscles.
Antagonists
The structural unit of a myofibril composed of actin and myosin filaments between two Z-lines.
Sarcomere