Kin 5 muscular system Flashcards
Reversal of muscle action
When the origin contracts towards the insertion (in pull up position, the proximal bone, which is usually more stable, have become the more movable bone!)
Name of a muscle can tell you
location, shape, action, # of heads or division, attachments, direction of fibers, size of muscle
parallel muscle
longer and has greater range of motion potential
oblique muscle
fibers shorter but more of them per given area - tend to have greater strength
parallel vs oblique
ROM vs strength
4 types of parallel muscle
strap, fusiform, rhomboidal (rectangular), triangular
strap muscle
parallel muscle fiber, long thin ALL fibers running entire muscle (sartorius)
fusiform muscle
parallel muscle fiber, wide in middle tapers at the end MOST fibers run entire muscle (biceps)
Muscle could be any size
rhomboidal muscle
parallel muscle fiber, four sided ,usually flat, broad tendon attachments at end (rhomboids, glut maximus)
triangular muscle
parallel muscle fiber, flat fan shaped, fibers going from narrow attachment to broad attachment (pec major)
3 types of oblique muscle
unipennate, bipennate, multipennate
unipennate muscle
oblique muscle, one side of a feather, short fibers attaching diagonally along a tendon (tib posterior, flexor pollicis longus)
Bipennate
oblique muscle, the full feather, attached around BOTH sides of the tendon, short fibers attaching diagonally
multipennate
oblique muscle, a couple muscle looking feathers around one tendon (deltoid)
Functional characteristics of muscle
normal resting length, contractility, extensibility, irritability, elasticity
