ACTIVITY 1
1. Zygomaticus Major Muscle
Origin: Origin point id from the Zygomatic bone
Insertion: Orbicularis at the modiolus
Action: Works with risorious muscle by lifting the corners of the mouth
2. Depressor Anguli Oris Muscle
Origin: Out of the fibers of the platysma muscle
Insertion: Modiolus mingling its fibers with the risorious and the orbicularis oris
Action: Aids in drawing the lower lip downward
3. Mentalis Muscle
Origin: Incisive fossa on anterior aspect of mandible
Insertion: Skin of chin
Action: Aids in elevation and wrinkling skin of chin and protrudes lower lip
4. Corrugator Supercilli and Procerus Muscles
Origin: Frontalis muscle
Insertion: Just above the root of the nose
Action: Responsible for the expression of frowning
5. Orbicularis Oculi Muscle
Origin: Frontal and maillary bones and the medial palpebral ligament
Insertion: Into the lateral palpebral raphia at the outer canthus of the eye
Action: Responsible for squinting and winking of the eyes
6. Frontalis and the Occipital Muscles
Origin: Out of the muscles that are over the bridge of the nose
Insertion: Posterior edge of the galea aponeruotica
Action: Responsible to create the expressions of surprise and fright by tightening the entire scalp
Reference:
Paternoster, G. (2022). Muscles Of Facial Expression. Muscles
Used. https://musclesused.com/muscles-of-facial-expression/