Action, Origin, Insertion of Major Neck Muscles for S&F2
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| Frontalis (occipitofrontalis) | -[A]- Raises eyebrows, wrinkles forehead (F only) -[O]- Galea aponeurotica (both) -[I]- skin above eyebrows (F only) | -[A]- Raises eyebrows, wrinkles forehead (F only) | -[O]- Galea aponeurotica (both) | -[I]- skin above eyebrows (F only)
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| Occipitalis (occipitofrontalis) | -[A]- Anchors & retracts galea posteriorly (O only) -[O]- Galea aponeurotica (both) -[I]- Superior nuchal line of occiput (O only) | -[A]- Anchors & retracts galea posteriorly (O only) | -[O]- Galea aponeurotica (both) | -[I]- Superior nuchal line of occiput (O only)
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| Temporalis | -[A]- Elevates & retracts mandible -[O]- Temporal fossa & fascia -[I]- Mandible: Coronoid process | -[A]- Elevates & retracts mandible | -[O]- Temporal fossa & fascia | -[I]- Mandible: Coronoid process
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| Masseter | -[A]- Elevates mandible. UniL: moves jaw laterally to same side. -[O]- Zygomatic arch -[I]- Angle & ramus of mandible | -[A]- Elevates mandible UniL: moves jaw laterally to same side. | -[O]- Zygomatic arch | -[I]- Angle & ramus of mandible
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| Sternocleidomastoid | -[A]- UniL: Laterally flexes head to same side Rotates head to opp. side BiL: Flexes neck Assists inhalation -[O]- Sternal Head: top of manubrium Clavicular Head: Medial 1/3 of clavicle -[I]- Temporal: Mastiod process; lateral superior nuchal | -[A]-UniL: Laterally flexes head to same side. Rotates head to opp. side. BiL: Flexes neck. Assists inhalation. | -[O]- Sternal Head: top of manubrium. Clavicular Head: Medial 1/3 of clavicle. | -[I]- Mastiod process of temporal bone;
lateral superior nuchal line of occiput
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| Scalenes (anterior) | -[A]- BiL: Elevate ribs during inhalation. Flex neck (ant scalene only) UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side -[O]- Trans Process C-3 to C-6 (ant. tubercles) -[I]- 1st rib | -[A]- BiL: Elevate ribs during inhalation. Flex neck (ant. scalene only) UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side | -[O]- Trans Process C-3 to C-6 (ant. tubercles) | -[I]- 1st rib
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| Scalenes (medius) | -[A]- BiL: Elevate ribs during inhalation. UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side. -[O]- Trans Process C-2 to C-7 (post. tubercles) -[I]- 1st rib | -[A]- BiL: Elevate ribs during inhalation. UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side. | -[O]- Trans Process C-2 to C-7 (post. tubercles) | -[I]- 1st rib
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| Scalenes (posterior) | -[A]- BiL: Elevate ribs during inhalation. UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side. -[O]- Trans Process C-5 & C-6 (post. tubercles) -[I]- 2nd rib | -[A]- BiL: Elevate ribs during inhalation. UniL: w/fixed ribs, laterally flex neck to same side. Rotate head & neck to opp. side | -[O]- Trans Process C-5 & C-6 (post. tubercles) | -[I]- 2nd rib
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A+maria
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