Chapter 8 Part II Flashcards
The fleshy portion of a muscle
Belly
Part of a muscle name referring to fibers parallel to midline
Rectus
The end of a muscle attached to the stationary bone
Origin
Part of a muscle name referring to the smallest of a set of muscles
Minor
A muscle that stabilizes the origin of a prime mover
Fixator
The the biceps brachii and triceps brachii muscles function as _____.
Antagonists
Muscles that helps the prime mover function more efficiently
Synergist
Part of a muscle name referring to a two-headed origin
Biceps
Part of a muscle name referring to a muscle with a circular shape
Orbicularis
Muscles generally move the none they lie ____ to.
Proximal
In order to move a bone, a muscle must have its _____ on that bone.
Insertion
Part of a muscle name referring to fibers perpendicular to midline
Transverse
Muscles of the back (posterior trunk) function to do what action to the head trunk, and upper arm?
Extend
A muscle that produces an effect opposite of the prime mover
Antagonist
Part of a muscle name referring to the largest of a set of muscles
Maximus
The end of a muscle attached to the movable bone
Insertion
Part of a muscle name referring to a muscle with a triangular shape
Deltoid
Part of a muscle name referring to a three-headed origin
Triceps
Ost movements occur due to the contraction of a _____ of muscles
Group
The hamstring muscles function to do what action to the lower leg?
Flex
Fixates _____ the origin of the prime mover so that they prime mover can act more efficiently.
Stabilize
Smiling
Zygomaticus major
Rotates the vertebral column to twist us sideways.
External oblique
Flexes and rotates the head
Sternocleidomastoid
Used in crossing our legs–flexes the leg at the knee joint and abducts and laterally rotates the thigh at the hip joint.
Sartorius
Together with the adductor group, adducts the thigh at the hip joint
Gracilis
Closes the eyelids
Orbicularis oculi
Extends the arm when the posterior portion contracts, abducts the arm when the lateral portion contracts, and flexes the arm when the anterior portion contracts
Deltoid
Abducts, flexes, or extends the arm at the shoulder joint.
Deltoid
Muscle in the thumb side that flexes the hand
Flexor carpi radials
Group that flexes the lower leg and extends the thigh
Hamstrings
Arm muscle that flexes arm and forearm
Biceps brachii
Works with the soleus to plantar flex the foot
Gastricenemium
Group that extends the leg at the knee joint
Quadriceps
Well-developed swimming muscle used to extend, abduct, or rotate the arm
Latissimus dorsi
Extends the phalanges
Extensor digitorium
Boxers use this muscle to move the scapula laterally and forward
Serratas anterior
Main muscle that closes the jaw
Masseter
The only quadriceps muscle that flexes the thigh and extends the leg
Rectus femoris
Puckers the lips
Orbicularis oris
Posterior arm muscle that extends the arm at the shoulder
Triceps brachii
Wrinkles the skin of the forehead
Frontalis
Elevates the clavicle, depresses or elevates the scapula, or extends the head
Trapezius
Flexes and abducts the thigh at the hip joint
Ensor fasciaelatae
Elevates and retracts the mandible
Temporalis
