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classfive again
class five again
12
Anatomy
Beginner
02/26/2016

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Cards

Term
What does the Frontalis do?
Definition
Raises eyebrows, draws scalp forward
Term
What does the Orbicularis Oculi do?
Definition
Closes eyes
Term
What does the Masseter do?
Definition
Chewing, clenching muscle. Attachment Zygomatic arch
Term
What does the Hyoid do?
Definition
Stabilize & move hyoid (tongue)
Term
What does the Platysma do?
Definition
Depresses lower lip, opens jaw, makes neck muscles pop out under jaw "Mrs. English"
Term
What does the Temporalis do?
Definition
Closes jaw
Term
What does the Orbicularis iris do?
Definition
Closes lips (shaped like a butt hole)
Term
What does the Buccinator do?
Definition
Compresses cheeks (suctioned in)
Term
How many muscles in the skull?
Definition
Eight
Term
Name of muscles are named how?
Definition
Origin (non-moving) generally superior (attachment site) & proximal position)
Term
Structure of muscles:
Definition
1. Each muscle is an organ
2. Muscle attached via tendon & facia to periosteum of bone
3. muscle is wrapped with epimysium
4. Muscle contins fascicule (muscle bundles) which are wrapped with perimysium
5. Fasciculi contins muscle fibers (cells wrapped with endomysium)
6. Cell membrane - sarcolemma/cytoplasm = sarcoplasm
Term
Different types of muscles functions:
There are 6 of them.
Definition
1. Sliding Filament theory
2.muscle fibers contain myofibrils sectioned into sarcomeres (functional unit of muscles)
3. Motor End Plate (between nerves and muscle)
4. Neurotransmitter
5. Neuron may innervate (supply) up to 500 muscles fibers depending on refinement of movement
6. Nerve cell & all muscle fibers - motor unit (fire asynchronously in postural muscles)
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