Mods10 Flashcards
a _____ is attached to one bone and extends across a joint to attach another bone.
Skeletal muscle
characteristic of muscle contraction (3) O I B
Origin
Insertion
Body
muscle end that attaches to stationary structure
origin
muscle end that attaches to moving structure
insertion
muscle between the origin and insertion
body
Several muscles usually influence a particular body movement. They are classified into three functional groups.
Prime mover
synergists
antagonists
most responsible for movement
prime mover
muscles that assist the prime mover.
may stabilize nearby bones
synergists
muscles that cause a movement opposite to that of the prime mover
antagonists
decreases an angle, bending
flexion
increases an angle, straightening or stretching movements
extension
moving a part away from the midline of the body, moving your arm out to the side
abduction
moving a part toward the midline of the body, bringing your arms down to your sides from an elevated position
adduction
movement around a longitudinal axis; rotating your head and neck by moving your skull from side to side as in shaking your head “no”
rotation
move distal end of a part in a circle, when a pitcher winds up to throw a ball, she circumdicts her arm
circumduction
hand positions that result from twisting of the forearm
supination and pronation
foot movements (upward and downward ankle movement)
dorsiflexion and plantar flexion
foot movements (sideways)
inversion and eversion
