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Lab 10: Head and Neck Muscles

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  • Frontalis

    Origin: Aponeurosis

    Insertion: Skin of eyebrows

    Action: Raises eyebrows & wrinkles forehead

  • Occipitalis

    Origin: occipital bone & temporal bone

    Insertion: aponeurosis

    Action: pulls scalp posteriorly

  • Orbicularis Oculi

    Origin: frontal bone & maxilla

    Insertion: tissue of eyelids

    Action: closes eyes

  • Zygomaticus

    Origin: zygomatic bone

    Insertion: skin at corner of mouth

    Action: raises corners of mouth

  • Orbicularis Oris

    Origin: maxilla & mandible

    Insertion: skin around mouth

    Action: closes lips

  • Mentalis

    Origin: mandible

    Insertion: skin of chin

    Action: wrinkles chin

  • Masseter

    Origin: zygomatic bone

    Insertion: mandible

    Action: elevates mandible

  • Temporalis

    Origin: temporal bone

    Insertion: mandible

    Action: elevates and retracts mandible

  • Buccinator

    Origin: maxilla & mandible

    Insertion: orbicularis oris

    Action: compresses cheek

  • Sternocleidomastoid

    Origin: sternum & clavicle

    Insertion: temporal bone

    Action: flexes head & laterally rotates head

  • Splenius Capitis

    Origin: cervical vertebrae #7 & thoracis vertebrae

    Insertion: occipital bone & cervical vertebrae

    Action: extend or hyperextend head