Lab Practical 1 Flashcards
What does the term insertion mean when applied to muscles?
Portion of the muscle that is mobile, moving portion.
What is flexion?
Reduce angle between bones.
What is extension?
Increase angle between bones.
What is hyperextension?
Taking a body part out of anatomical position.
What is abduction?
Taking away from midline.
What is addictions?
Bringing back to midline.
What is rotation?
Rotating limb on longitudinal axis.
What is circumduction?
Flexion, extension, abduction, adduction; mixture of these four movements.
What is pronation?
Palm down (proposal position)
What is supination?
Palm facing up (holding a bowl of soup)
What is inversion?
Soul of foot toward inside.
What is eversion?
Soul of foot toward outside.
What is dorsiflexion?
Raise toes up toward shin.
What is plantar flexion?
Point toes down (on your toes)
What does the term origin mean when applied to muscles?
Part of the muscle that doesn’t move.
What is a prime mover/agonist?
muscle that is responsible for the movement
What is an antagonist?
Opposing the prime mover; returning the body part
What is a synergist?
muscle that assists in the movement
What is a fixator?
A special type of synergist that fixes the origin and keeps it in place.
Zygomaticus
origin: zygomatic
insertion: skin/muscle at corner of mouth
action: raise lateral corners of mouth
Levator labii superioris
origin: zygomatic/maxilla
insertion: skin/muscle of upper lip
action: moves upper lip superiorly/opens lips
Depressor labii inferioris
origin: mandible
insertion: skin/muscle of lower lip
action: move lower lip inferiorly
masseter
origin: maxilla/zygomatic
insertion: mandible
action: close jaw, elevate mandible
