Card Set Information
This includes skeletal muscles
Rectus abdominis, is an example of a muscle named by:
Its Direction of fibers relative to the body
The external oblique is an example of a muscle named for:
the Peroneus Brevis is an example of a muscle named for:
The trapezius is an example of a muscle named for:
The Origin is:
attachment of the muscle's tendon to the more stationary bone.
The insertion is the:
attachment of the other tendon from the muscle to the moveable bone
Quadriceps has how many origins
The adductor longus is a muscle named for:
Do movements of muscles just use one muscle to do its action.
In most cases the movement requires several skeletal muscles acting together.
Most skeletal muscles are arranged in ________ pairs.
responsible for the desired movement
responsible for the opposite movement
What would happen if the Agonist and Antagonist contracted with equal strength?
no movement would occur.
In order to produce movement:
one relaxes and is stretched while the other contracts.
What is a Synergist?
help steady a movement and aid efficiency
What is a Fixator
it helps stabilize the origin to aid efficiency
During Inspiration: the diaphragm moves ______ when it contracts. The ribs move:
downward, up and out because of contraction of external intercostals and the accessory muscles.
During expiration: the diaphragm moves _____ when it contracts. The ribs move:
upward, moves down and inward because of the contraction of the internal costals, external oblique, rectus abdominis, transversus abdominis, internal oblique
Which muscles are for Mastication
Temporalis, Masseter, Lateral pterygoid, Medial pterygoid.
What muscles are for facial expressions?
Frontalis, Orbicularis oris, Buccinator, Zygomaticus (major and minor), Orbicularis oculi, Platysma, Corrugator supercilii
Which muscle raises the eyebrows?
What muscles closes lips, protrudes lips, and shapes lips during speech.
What muscle caves the cheeks in for sucking, or blowing air out.
What muscle moves corner of mouth up and out as in smiling
Zygomaticus (minor and major)
What muscle closes the eye?
What muscle moves the lower lip inferiorly and posteriorly as in pouting
What muscle pulls the eyebrows down as in frowning
Which neck muscle flexes the neck, and rotates face on the opposite side that it contracts on
Which neck muscle raises the head, and when they contract rotates the head on the same side it contracts.
Which muscle maintains erect position of spine:
What flexes the vertebral column to compress the abdomen?
Which two muscles act on the pectoral girdle
Trapezius and the Levator scapulae
What is the action of the Trapezius
Elevate the scapula
What is the action f the Levator scapulae?
Elevate the scapula
In moving the upper arm the Deltoid:
Abducts the arm
What is the action of the Pectoralis major:
Adduct the arm
What muscle Draws the arm posteriorly?
rotates the arm laterally and adducts the arm
flexes and adducts the arm
What three muscles move the forearm?
Biceps Brachii, Triceps Brachii and Supinator
What action does the Biceps Brachii do:
Flexes the forearm
The Triceps Brachii:
Extends the forearm
Supinates the forearm and the hand
Flexors and Extensors move the:
The Gluteus Maximus:
extend the thigh
The Gluteus Medius:
Abducts the Thigh
A muscle that moves the thigh, the Tensor Fasciae Latae
Flexes and abducts thigh
A muscle that moves the thigh, the Adductor Magnus:
adducts the thigh.
The longest muscle in the body that flexes the thigh and rotates it laterally is?
the Sartorius, which is the leg crossing muscle.
The Quadriceps Femoris has 4 sections which are?
Rectus femoris, vastus medialis, vastus lateralis, and the vastus intermedius.
Biceps Femoris is one of the:
hamstrings that flexes the lower leg the rectus portion also flexes thigh
The semimembranosus and semitendinosus are also called?
hamstrings that flex the lower leg the rectus portion also flexes the thigh.
The gracilis adducts what?
the thigh and flexes the lower leg
The Gastrocnemius moves what?
The foot, it flexes the foot and the lower leg and inserts on the heel by way of calcaneal tendon
The soleus flexes what?
the foot and inserts on the heel by way of the calcaneal tendon.
The tibialis anterior:
dorsiflexes (pulls up) and inverts (turns in) the foot.
At what point do muscle fibers become progressively get replaced by fat?
beginning at about 30 years of age.
What occurs during Muscular dystrophy:
Its an inherited muscle- destroyed disease where individual muscle fibers degenerate
What occurs during Myasthenia Gravis
weakness of skeletal muscles, Is an autoimmune disease- body produces antibodies that bind to the receptors for chemical signals from nerves, in response muscles cant respond normally.
What are other muscle diseases caused by?
Nerve Function (multiple sclerosis, polio)