Muscles- Head And Neck Flashcards
Epicranius
Origin- Occipital Bone
Insertion- Skin around Eye
Action- Raises eyebrow
Orbicularis Oculi
Origin- Frontal Bones
Insertion- Skin around Eye
Action- Closes eye
Orbicularis Oris
Origin- muscles near mouth
Insertion- Skin of lips
Action- closes lips
Buccinator
Origin- maxilla and mandible
Insertion- orbicularis oris
Action- compresses cheeks
Zygomaticus Major
Origin- zygomatic bone
Insertion- orbicularis oris
Action- raises corners of mouth
Zygomaticus Minor
Origin-zygomatic bone
Insertion- orbicularis oris
Action- raises corners of mouth
Platysma
Origin- fascia in upper chest
Insertion- mandible
Action- draws angles of mouth downward
Masseter
Origin- zygomatic arch
Insertion- mandible
Action- elevates mandible
Medial pterygoid
Origin- sphenoid
Insertion-mandible
Action-elevates mandible
Lateral pterygoid
Origin-sphenoid
Insertion- mandible
Action- depresses mandible
Temporalis
Origin- temporal bone
Insertion- coronoid process, mandible
Action- elevates mandible
Sternocleidomastoid
Origin- sternum, clavicle
Insertion- mastoid process
Action- pulls head to one side or to chest
Splenius capitis
Origin- cervical and thoracic vertebrae
Insertion- occipital bone
Action- rotates head
Semispinalis capitis
Origin- cervical and thoracic vertebrae
Insertion- occipital bone
Action- extends head
