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muscles

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Terms in this set (15)

  • extrinsic eye muscles

    six muscles move each eye, most originate from common tendinous ring at posterior orbit

  • masseter muscle

    elevates mandible

  • temporalis muscle

    elevates mandible

  • medial pterygoid muscle

    elevates mandible as a synergist to the masster and temporalis

  • lateral pterygoid muscle

    depresses the madible, works with the medial pterygoid to pull mandible foward, produces side to side movements necessary for grinding food

  • digastric, stylohoid, mylohyoid, geniohyoid muscles

    elevate hyoid bone and raise tongue and floor of mouth in preperation for swallowing

  • genioglossus muscle

    protrudes tongue

  • hygoglossus muscle

    depresses tongue

  • styloglossus muscle

    elevates and retracts tongue

  • sternohyoid, omohyoid, sternothyroid

    depress pharynx

  • thyrohyoid muscle

    pushes food farther into pharynx while preventing entrance of food into respiratory tract

  • pharyngeal constrictor muscle

    contracts in sequence from superior to inferior to push food into esophogus

  • sternocleidomastoid muscle

    rotates head toward the opposite shoulder when acting individually, flexes head when both muscles act together

  • scalene muscles, lateral, middle, posterior, individually

    head pulled laterally when acting individually, origin and insertion can switch

  • sclaene muscles together function

    when fixators hold head and neck in place, ribs are elevated in deep breathing