chapter 5( muscular) Flashcards
muscles
a bundle of elastic tissue that contracts
insertion
more movable bone, mores towards the stable bone Origin
Example of origin/insertion
bicep flex, insertion moves to the top origin
Parallel fibers
long, more range of motion
Oblique fibers
shorter, great strength potential
parallel fibers arrangement
Strap
Fusiform
Rhomboidal
Traingular
oblique fibers
unipennate, bipennate, multipennate
Characteristics of muscles
irritability, contractibility, extensibility, elasticity
Tension
force built up
Shorten
½ of normal resting length
Excursion
distance from max elong to max short
Active insufficiency
muscle cannot be shorten farther
Passive insufficiency
muscle cannot be elongated any farther
Isometric
muscle contract produce force w/o change
Isotonic
muscle contract w/t change L/ angle (flex dumbbell)
Concentric
raising motion
Eccentric contraction
lowering weights
Isotonic
user control rate exercise
Isokinetic
fixed rate speed exercise
Agonist
muscle group that cause motion
Antagonist
muscle group that perform app of of contraction
Stabilizer
muscles that support and help agonist
Neutralizer
prevents unwanted motion
synergist
group all muscle role together
Closed kinetic chain
distal seg is closed. Ex.rising fr sitting
Open kineric chain
distal seg free to move