Module 33 - Skeletal Muscle Gross Anatomy Flashcards
what is the origin/head of a muscle
muscle end attached to more stationary of two bones
what is the insertion of a muscle
muscle end attached to bone with greatest movement
what is the belly of a muscle
largest portion of the muscle between origin and insertion
what are tendons
attach muscle to bones
what is an aponeurosis
a very broad tendon
differentiate agonist and antagonist
agonist: muscle that, when it contracts, causes an action
antagonist: a muscle working in opposition to agonist.
what are synergists
muscles that work together to cause a movement
differentiate primer mover and fixators
prime mover: plays major role in accomplishing movement
fixator: stabilize joints crossed by the prime mover; prevent movement of the origin of the prime mover
what is flexion in general for head and neck muscles
muscles deep within the neck along the anterior margins of the vertebral bodies
what is extension in general for head and neck muscles
posterior neck muscles attached to occipital bone and mastoid process
rotation and lateral flexion is from which groups in head and neck muscles
lateral and posterior groups
give 2 examples of prime movers in head and neck
sternocleidomastoid and trapezius
muscles that move the vertebral column…
extend, laterally flex and rotate the vertebral column
differentiate deep and superficial groups in vertebral column
deep = from vertebra to vertebra
superficial = extend from vertebrae to ribs
give an example of a muscle that moves the vertebral column
erector spinae (prime movers of back extensions)
