ACTIVITY 1

ARZADON, Beatrice V.

ARZADON, Beatrice V.

by Beatrice Arzadon -
Number of replies: 0
  1. Risorius
    1. Origin: Parotid fascia, Buccal skin, zygomatic bone (variable)
    2. Insertion: Modiolus
    3. Action: It pulls the corner of the mouth laterally via its contraction in an outward and upward motion
  2. Depressor anguli oris
    1. Origin: It originates from the oblique line and mental tubercle of the mandible located on the anterior aspect of the bone
    2. Insertion: Into the lips
    3. Action: It pulls the angle of the mouth inferolaterally
  3. Mentalis
    1. Origin: Incisive fossa on anterior aspect of mandible
    2. Insertion: Skin of chin
    3. Action: It elevates and wrinkles skin of chin and protrudes lower lip
  4. Corrugator supercilii muscle
    1. Origin: It originates from the medial end of the superciliary arch of the frontal bone, cranially to the root of the nose
    2. Insertion: It inserts into the skin of the eyebrow above the middle part of the supraorbital margin
    3. Action: It pulls the skin of the eyebrow downward and medially and produces vertical wrinkles of the forehead
  5. Orbicularis oculi
    1. Origin: It originates from the nasal portion of frontal bone, frontal process of maxilla, medial palpebral ligament, and the lacrimal bone
    2. Insertion: It inserts onto the lateral palpebral raphe and superior and interior tarsal plates
    3. Action: It closes the eyelids and assists in pumping the tears from the eye into the nasolacrimal duct system
  6. Frontalis
    1. Origin: It originates posteriorly from the galea aponeurotica, which corresponds with the hairline on the surface
    2. Insertion: At the eyebrow dermis
    3. Action: It elevates the eyebrows

References

N.A. (2020). Corrugator Supercilii Muscle. Mobile Physical Therapy. Retrieved from https://mobilephysiotherapyclinic.in/corrugator-supercilii/#ORIGIN_AND_INSERTION 

 

Germann, A. & Khalili, Y. (2023). Anatomy, Head and Neck, Risorius Muscle. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK540999/#:~:text=The%20risorius%20muscle%20is%20a,the%20angle%20of%20the%20mouth. 

 

Sendic, G. (2022). Depressor anguli oris muscle. Kenhub. Retrieved from https://www.kenhub.com/en/library/anatomy/depressor-anguli-oris-muscle 

 

N.A. (n.d.). Mentalis. Loyola University Medical Education Network Master Muscle List. Retrieved from https://www.meddean.luc.edu/lumen/meded/grossanatomy/dissector/mml/men.htm 

 

Pessino, K., Patel, J., Patel, B. (2023). Anatomy, Head and Neck; Frontalis Muscle. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK557752/ 


Tong, J., Lopez, M., Patel, B. (2023). Anatomy, Head and Neck: Eye Orbicularis Oculi Muscle. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK441907/#:~:text=The%20orbicularis%20oculi%20muscle%20closes,into%20the%20nasolacrimal%20duct%20system.