Ch 10: muscular system Flashcards
Origin/head
Muscle in attached to more stationary of two bones
- (stationary)
Insertion
Muscle in attaches to bone with a greater movement
- (movement)
Belly
Largest portion between origin and insertion
Tendons
Attaches muscle to bone
Agonist
Muscle, when it contracts, causes main action
Primary mover
Major role in accomplishing movement
Antagonist
Muscle working in opposition to agonist
Synergists
Muscle works together to cause movement
Fixators
Prevents movement of origin of primary mover
Nomenclature location
Pectoralis, gluteus, brachial, ephemeral
Nomenclature size
Maximus, minimus, Logus, brevos
Nomenclature shapes
Deltoid, quadratus, trapezius, Teres
Nomenclature orientation
Rectus, oblique
Nomenclature number of heads
Biceps, triceps, quadriceps
Nomenclature, origin and insertion
Sternocleidomastoid, brachioradialis
Nomenclature function
Abductor, adductor, masseter
Lever
Rigid Shaft or bone
Fulerum
Pivot point or joint
How does parts of the body or whole body move together?
Muscles and tendons and bones work together as a lever systems 
Occipitofrontalis
Move scalp and forehead
Orbicularis oculi
Close eye
Nasalis
Dilate nostril
Orbicularis oris
Close lips
levator anguli oris
Elevate angle of mouth
Buccinator
Flatin cheeks
Levator labi superioris
Elevate lips
Zygomaticus, minor/major
Elevate and abduct lips
Risorius
Abducts angle of mouth
Depressor anguli oris
Depress angle of mouth
Depressor labii inferioris
Depressed lower lips
Mentalis
Elevate lower lip
Platysma
Tense skin over neck
Masseter
Elevate and protract mandible
(Chew)
Temporalis
Elevate and retract mandible
Medial pterygoid
Protract and elevate mandible
Lateral pterygoid
Protract and depress mandible
(Lower jaw when chewing)
What facial expression muscle makes the duck lips
Orbicularis oris
