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Neck Muscles (AOI)

Action, Origin, Insertion of Major Neck Muscles for S&F2

MuscleAllActionOriginInsertion
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)
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)
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
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
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
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
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
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
Created by: A+maria on 2005-04-19



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