Lab Practical EX. 13 TERMS

muscles that are most responsible for producing a particular movement

prime movers/ agonists

muscles that oppose or reverse a movement

antagonists

aid the action of prime movers/agonists and assist with the same movement, by reducing unecessary movement and provide stability

synergists

specialized synergists, immobilize the origin (less movable attachment) of a prime mover, so all tension is exerted at the insertion (more movable attachment)

fixators (ex. muscles that maintain posture)

straight direction of muscle fiber/cell

rectus

right angle direction of muscle fiber/cell

transverse

direction other than 90 degrees of a muscle fiber/ cell

oblique

name the muscle structure and the muscle in A

• circular

• orbicularis oris

name the muscle structure and the muscle in B

• convergent

• pectoralis major

name the muscle structure and the muscle in C

• fusiform

• biceps brachii

name the muscle structure and the muscle in D

• parallel

• sartorious

name the muscle structure and the muscle in E

• multipennate

• deltoid

name the muscle structure and the muscle in F

• bipennate

• rectus femoris

name the muscle structure and the muscle in G

• unipennate

• extensor digitorium longus

term for largest muscle

maximus

term for smallest muscle

minimus

term for longest muscle

longus

term for shortest muscle

brevis

muscle location

some muscles are named for the bone with which they are associated

when biceps, triceps, and quadriceps are used, it

indicates the amount of origins

location of attachments

ex. sternocleidomastoid muscle

• origin on sternum and clavicle

• inserts on mastoid process of temporal bone

muscle shape

ex. deltoid muscle is roughly triangular, and trapezius muscle resembles a trapezoid

muscle action

ex. all the adductor muscles of the anterior thigh bring about its adduction, and all the extensor muscles of the wrist extend the hand