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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Agonist |
Does most of the work
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Synergist |
Helps primary muscle (agonist) |
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Antagonist |
Does opposite of agonist |
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Fixator |
Agonist and antagonist that work together to stabilize a joint |
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4 muscles of mastication |
Masseter temporalis medial pterygoid lateral pterygoid
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Actions of the following muscles: Masseter Temporalis Medial pterygoid Lateral pterygoid |
elevates mandible elevates mandible elevates mandible; moves it from side to side protracts mandible; moves it from side to side |
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Action of the Sternocleido-mastoid muscle |
flexes the neck |
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The erector spinae consists of 3 main muscles sets |
iliocostalis
longissimus
spinalis |
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iliocostalis muscles (lateral) consist of 3 muscles. What are they and what are thier actions? |
Cervicis- extends neck Thoracis- stabilizes thoracic vertebrae in extension Lumborum- extends vertebrae; depresses ribs |
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longissimus muscles (intermediate) consist of 3 muscles. What are they and what are thier actions? |
Capitis- extends neck Cervicis- extends neck Thoracis- extends vertebrae |
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spinalis muscles (medial) consist of 2 muscles. What are they and what are thier actions? |
Cervicis- extends neck Thoracis- extends vertabrae |
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Action of the quadratus lumorum |
depress ribs; stabilize diaphragm during inhalation |
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Action of scalene muscles |
elevates ribs; flexes the neck |
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Action of external intercostals |
elevates ribs during INHALATION |
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Action of internal intercostals |
depresses ribs during EXHALATION
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Action of external obliques |
compresses abdomen; depresses ribs |
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Action of internal obliques |
compresses abdomen; depresses ribs |
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Action of tranversus abdominis |
compresses abdomen |
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Action of rectus abdominis |
depresses ribs; compresses abdomen |
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Action of diaphragm |
Contracts and expands thoracic cavity |
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