Exam 3 Matching Flashcards
motor unit
one motor neuron and the muscles cells it innervates
prime movers
muscle that provides a major force for a specific movement
synergists
muscles which act together
antagonists
muscles that oppose each other
fixators
muscles that prevent movement of a joint; helps stabilize joint
Method of Muscle Naming
By __location___ of muscle
abdominis? abdomen
anconeus? elbow
brachialis? arm
carpi? wrist
cleido? clavicle
genio? chin
glosso? tongue (glossary)
By the __shape________ of the muscle
deltoid? triangualr
trapezius? like a trapezoid
rhomboideus? like a rhomboid or parallelogram
orbicularis? round Circular muscles(sphincters): orbicularis oris
By the ___Direction____of the muscle fibers
rectus: Straight or parallel (rectus abdomins)
transverses: At right angles (transversus abdominis)
oblique: Muscles run at an angles (internal abdominal obliques)
sphincter: (orbicularis) Circular Muscles
convergent the origin (the attachment to a fixed bone, usually the proximal attachment) is wider than the point of insertion (pectoral major)
By the ___Relative Size____ or _Realtive__ Location ___of the muscle (often in pairs)
maximus? Largest
medias? Middle
minimus? Smallest
longus? Long
brevis? Short
internus? Internal
externus? External
superior? Top
inferior? Bottom
lateralis?
intermedius?
medialis?
By the _Number____ of origins
biceps brachii: 2 tendons of origin
triceps brachii: 3 heads
quadriceps: 4 heads
By the _Location of attachments:
Which is named first?origin is always named first
Example: Sternoceldiomastiod
By the __Action____ of the muscle
flexor : brings bones closer together
extensor: takes bones further apart
abductor: takes bone away from the midline
adductor: brings bone closer to body Examples: Adductor longus, Abductor hallucis, Extensor Crapi radialis longus, Flexor capri radialis
