LECTURE 2 muscles Flashcards Preview

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Flashcards in LECTURE 2 muscles Deck (10):
1

origin vs. insertion in thorax

origin is medial, insertion is lateral attachment (generally end that moves)

2

origin vs. insertion in extremity

origin is proximal, insertion is distal

3

direct attachment

right onto bone

4

indirect attachment

via tendon/aponeurosis (more common, leave bony markings, sometimes attach to skin)

5

function of muscle

movement

6

agonist

prime mover of a muscle, major response produces particular movement, describes muscle to action

7

antagonists

oppose/reverse particular movement, prevent overshooting agonistic motion, describes muscle to another muscle

8

synergists

muscles work together, adds extra force to agonistic movement, reduce undesirable extra movement (muscles crossing two joints), can enforce same action or create new movement

9

fixators

a synergist that holds bone in place to provide stable base for movement

10

naming skeletal muscles

location (brachialis=arm), shape (deltoid=triangle), relative size (minimus, maximus, longus), direction of fascicles (oblique, rectus), location of attachment (brachioradialis), number of origins (biceps, quadriceps), action (flexor, adductor, extensor)