Skip to main content
뒤로

muscles

컨트롤 버튼이 '내비게이션' 모드로 변경되었습니다.
1/32

이 집합의 용어 (32)

  • agonist (prime movers)

    provides most of force required for given movement

  • antagonist

    lies on opposite side of a joint from agonist partner, oppose and slow action, required for slower movement

  • synergists

    muscles that work together with the agonist, help guide movement , smoothness

  • fixators

    hold bone in place, anchoring function that makes movement more efficient, reduces risk of energy

  • origin

    part muscle attaches to that is more fixed

  • insertion

    part muscle attaches to that moves

  • lever

    itself, bones

  • load

    object you are trying to move

  • force

    applied to lever to move load, tension generated by muscles

  • fulcrum

    hinge point, around which lever moves

  • first class lever

    load to be moved is on one side of lever, fulcrum in middle, force is applied to other side of lever

  • first class lever example

    atlanto-occipital joint

  • second class lever

    fulcrum is located on one end of lever, load in middle, for to move load is applied on other end of lever

  • second class lever example

    uncommon in body, metatarsophalangeal joints

  • third class lever

    load to be moved is on one end of lever, force moving load is applied in middle, fulcrum is at other end of lever

  • third class lever example

    most common in body, elbow joint

  • mechanical advantage

    fulcrum close to load, small force to move large load

  • mechanical disadvantage

    fulcrum farther from load, require greater force to move load

  • muscle of facial expression

    insert into skin or connective tissue rather than bone, action produces shape changes to skin and structures of face

  • epicranius muscle composition

    frontalis and occipitals, ep

  • epicranius muscle function

    epicranial aponeurosis connects two bellies, elevates eyebrows and skin of forehead, injection site for botox

  • orbicularis oculi muscle location

    circular muscle surrounding orbit

  • orbicularis oculi muscle function

    pulls eyelid closed as in blinking or winking

  • levator palpebrae superioris muscle

    posterior to the orbit, pulls eyes open

  • corrugator supercili muscle fucntion

    squinting

  • levator labii superioris muscle function

    pulls upper lip superiorly in folds to produce a grimace or sneer

  • zygomaticus major and minor muscles

    around corners of mouth, assist with smiling

  • orbicularis oris muscle

    around mouth, four curved quadrants provide fine muscle control over lips for eating, drinking, whistling

  • depressor anguli oris, depressor labii inferioris , mentalis muscles

    contribute to frowining expressions, latter two also protract lower lip as in pouting

  • buccinator muscle

    pulls cheek inward, sucking, chewing

  • platysma muscle location

    broad, flast, sheetlike muscle found in superficial neck

  • platysma muscle function

    prduces open mouthed, jaw dropping, tightens skin of neck