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Rectus Abdominis: action?
- Action: flexion of spine, compression of abdominal cavity
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External abdominal oblique: actions?
- Action: flexion of spine
- Compression of abdominal cavity
- Trunk Rotation
- Lateral flexion
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Internal ABdominal oblique: actions?
- Actions: Flexion of spine
- Compression of abdominal cavity
- Trunk rotation
- Lateral flexion
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Transversus abdominis: actions?
- Action: compress abdominal contents
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Diaphragm: action?
action: inspiration
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sternocleidomastoid: action?
action: active inspiration
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Abdominal muscles: action?
action: active expiration
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Frontalis: origin, insertion, action?
- Origin: epicranial aponeurosis (scalp)
- insertion: skin of forehead
- action: lifts eyebrows and skin of forehead
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Occipitalis: origin, insertion, action?
- Origin: epicranial aponeurosis (scalp)
- insertion: nuchal lines
- action: lifts eyebrows and skin of forehead
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Orbicularis Oculi: origin, insertion, action?
- Origin & Insertion: sphincter muscle around eyes
- action: open and closes eyes
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Orbicularis Oris: origin, insertion, action?
- Origin & insertion: sphincter muscles around mouth
- action: open and closes mouth
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Mentalis: action?
- Action: Protudes lower lip (ie pouty face)
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Temporalis: origin, insertion, action
- origin: Temporal Fossa
- insertion: coronoid process of mandible
- Action: elevates mandible = closes the mouth
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Masseter: origin, insertion, action?
- Origin: Zygomatic arch
- insertion: angle and ramus of mandible
- action: elevates mandible = occludes ("clenches") teeth
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Lateral pterygoid: action?
- Action: lateral displacement of mandible
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Medial pterygoid: action?
- action: lateral displacement of mandible
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Buccinator: action?
- action: compresses cheeks against teeth
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