Chapter 8 Part 2 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
Orgin
Part of a muscle name referring to the smallest set of muscles
Minimus
A muscle that stabilizes the origin of a prime mover
Fixators
The biceps brachii and triceps brachii muscles function as
Antagonists
Muscle that helps the prime mover function more efficiently
Synergists
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
Obicularis
Muscles generally move the bone they lie ______ to
Closest
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
Most movements occur due to the contraction of a _____ of muscles
Groups
The hamstring muscles function to do what action to the lower leg
Flexes leg at the knee joint
Fixators ___ the origin of the prime mover so that the prime mover can act more efficiently
Stabilizes
Smiling
Zygomaticus major
Rotates the vertebral column to twist us sideways
External oblique
Flexes and rotates the head
Sterncleclomastroide
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 posterior portion contracts
Abducts the arm when the lateral portion contracts
Flexes the arm when the anterior portion contracts
Deltoid
Abducts, flexes and extends the arm at the shoulder joint
Deltoid
Muscle on 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 plantarflex the foot
Gastrocernius
Group that extends the leg at the knee joint
Quadriceps
Well-developed swimming muscle used to extend, adduct, or rotate the arm
Latissimus Dorsi
Extends the phalanges
Extensor dicjitorium
Boxers use this muscle to move the scapula laterally and forward
Serratus 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
Extends the head
Trapezius
Flexes and abducts the thigh at the hip joint
Tensor fasciae latae
Elevates and retracts the mandible
Temporalis
