muscles Flashcards
(28 cards)
What is Adduction?
An action that returns a limb to the side of the body.
What is Abduction?
An action that moves a limb laterally away from the body.
What is Flexion?
An action that moves a surface toward a ventral surface.
What is Extension?
An action that moves a dorsal surface away from the ventral surface.
What is Hyperextension?
An action that moves a joint beyond its normal range.
What is Circumduction?
A motion that makes circles rather than twisting.
What is Internal Rotation?
A motion of the shoulder or hip that causes a limb to rotate toward the body.
What is External Rotation?
A body movement that rotates a limb away from the body’s center.
What is Supination?
A motion that rotates the hand so that the palm faces forward or upward.
What is Pronation?
A reversal of position, order, form, or relationship.
What is Inversion?
The act of turning inside out or rotated inward.
What is Eversion?
A motion that rotates outward away from the sole.
What is Plantar Flexion?
Flexion of the foot in an downward direction.
What is Dorsiflexion?
Flexion of the foot in a upward direction.
My/o
Muscle
Derived from the Greek word ‘mys’ meaning muscle.
Extensibility
Capable of being extended (stretched)
Refers to the ability of muscle fibers to stretch.
Myocyte
A muscle cell
The basic unit of muscle tissue.
Striated
Arranged in a striped pattern
Refers to skeletal and cardiac muscle appearance.
Origin
The more fixed, central part of a muscle
The attachment point that does not move during contraction.
Insertion
The part of a muscle that can be moved
The attachment point that moves during contraction.
Tendon
The tough, fibrous tissue that connects your muscles to your bones
Tendons transmit the force generated by muscles to bones.
Fascia
A sheet of connective tissue covering/binding together body structures
Provides support and structure to muscles and organs.
Atrophy
Decrease in size or wasting away of a body part or tissue
Often occurs due to disuse or disease.
Hypertrophy
Excessive development of an organ or part
Commonly refers to muscle growth from resistance training.
