ch 5 Flashcards
rotary motion
movement around an axis and implies that the levers (bones) rotate around the axis (joints)
torque
force that produces rotation; turning effect of the joint
flexion
bending movement; decreases relative angle between segments
sagittal plane
bicep curl, tricep pushdown, squat
extension
straightening movement; increases relative angle between segments
sagittal plane
bicep curl, tricep pushdown, squat
plantarflexion
extension at the ankle
sagittal, toes pointed toward ground
dorsiflexion
flexion at the ankle, sagittal, toes flexed
abduction
movement in frontal plane away from the middle
frontal plane
side lateral raise, side lunge, side shuffle
ab duck station- a duck kidnaps a kid, takes it away from its home
adduction
movement in frontal plane toward the middle
frontal plane
side lateral raise, side lunge, side shuffle
horizontal abduction
transverse plane arm movement from anterior to lateral
transverse plane
chest flies
horizontal adduction
transverse plane arm movement from lateral to anterior
transverse plane
chest flies
internal rotation
rotation toward the middle of the body
transverse plane
throwing, golfing, swinging a bat, trunk rotation
external rotation
rotation away from the middle of the body
transverse plane
throwing, golfing, swinging a bat, trunk rotation
Concentric
moving in opposite direction of force, accelerates or produces force; muscle shortens
Eccentric
muscle develops tension while lengthening; decelerates force; the “negative”; landing from a jump, lowering of squat
Isometric
muscular force equal to resistive force, stabilizes force; no change in muscle length
sagittal plane
flexion/extension
coronal axis
frontal plane
adduction/abduction, lateral flexion, eversion/inversion
anterior-posterior axis
transverse plane
internal, external, left/right rotation; horizontal adduction and abduction
longitudinal plane
length-tension relationships
resting length of a muscle and the tension it can produce at that length
myosin and actin overlap
force-couple relationships
muscles working together to produce movement
sagittal plane types of motion
flexion/extension
biceps curl triceps pushdown squat calf raise walking running jumping climbing stairs
frontal plane types of motion
adduction/abduction
lateral flexion
eversion/inversion
side lat raise
side lunge
side shuffle
transverse plane types of motion
internal rotation external rotation left/right rotation horizontal adduction horizontal abduction
trunk rotation
throwing
golfing
swinging a bat
what are poor posture and misaligned joints caused by?
altered length-tension relationship
