Term
| What does the Frontalis do? |
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Definition
| Raises eyebrows, draws scalp forward |
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Term
| What does the Orbicularis Oculi do? |
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Definition
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Term
| What does the Masseter do? |
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Definition
| Chewing, clenching muscle. Attachment Zygomatic arch |
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Term
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Definition
| Stabilize & move hyoid (tongue) |
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Term
| What does the Platysma do? |
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Definition
| Depresses lower lip, opens jaw, makes neck muscles pop out under jaw "Mrs. English" |
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Term
| What does the Temporalis do? |
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Definition
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Term
| What does the Orbicularis iris do? |
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Definition
| Closes lips (shaped like a butt hole) |
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Term
| What does the Buccinator do? |
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Definition
| Compresses cheeks (suctioned in) |
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Term
| How many muscles in the skull? |
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Definition
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Term
| Name of muscles are named how? |
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Definition
| Origin (non-moving) generally superior (attachment site) & proximal position) |
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Term
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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 |
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Term
Different types of muscles functions:
There are 6 of them. |
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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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