Muscles Of Facial Expressions Flashcards
What is the primary function of the muscles of facial expression?
To facilitate facial movements and expressions.
Which cranial nerve innervates the muscles of facial expression?
The facial nerve (cranial nerve VII).
True or False: The muscles of facial expression originate from bone.
False.
Fill in the blank: The muscles of facial expression primarily insert into the _______.
skin.
Name one muscle that is responsible for closing the eyelids.
Orbicularis oculi.
What muscle is primarily responsible for smiling?
Zygomaticus major.
Which muscle is involved in puckering the lips?
Orbicularis oris.
What is the origin of the frontalis muscle?
The galea aponeurotica.
Which muscle assists in frowning?
Depressor anguli oris.
True or False: The buccinator muscle is responsible for chewing.
True.
Multiple choice: Which of the following muscles is NOT a muscle of facial expression? A) Risorius B) Masseter C) Platysma
B) Masseter.
What is the primary action of the platysma muscle?
To depress the mandible and tense the skin of the neck.
What is the insertion point of the orbicularis oris?
Mucous membrane of the lips.
Fill in the blank: The _______ muscle is responsible for raising the eyebrows.
Frontalis.
Name the muscle that helps in blowing air out of the mouth.
Buccinator.
What is the innervation of the zygomaticus major?
Facial nerve (CN VII).
True or False: The corrugator supercilii muscle is responsible for raising the eyebrows.
False.
What is the action of the risorius muscle?
To pull the corners of the mouth laterally.
Multiple choice: Which muscle is primarily responsible for frowning? A) Frontalis B) Depressor anguli oris C) Orbicularis oculi
B) Depressor anguli oris.
What is the origin of the orbicularis oculi?
Frontal bone and maxilla.
Fill in the blank: The _______ muscle aids in closing the mouth.
Orbicularis oris.
Which muscle is involved in expressing surprise?
Frontalis.
What is the role of the mentalis muscle?
To elevate and protrude the lower lip.
True or False: The facial nerve branches into five main divisions.
True.
What is the innervation of the buccinator muscle?
Facial nerve (CN VII).
Name the muscle that pulls the eyebrows together.
Corrugator supercilii.
What is the action of the depressor labii inferioris?
To lower the lower lip.
What’s the origin of the muscles of facial expressions?
From the mesoderm of the 2nd pharyngeal arch
Which nerves supply the muscles of facial expressions?
Temporal,zygomatic,buccal,marginal mandibular,cervical and posterior auricular nerves
Describe the occipitofrontalis muscle
Has ;
1️⃣ frontal belly- innervated by temporal nerve
2️⃣ occipital belly- innervated by posterior auricular nerve
Action- elevates the eyebrows and wrinkles forehead
Described the orbicularis Oculi muscle
Has two parts:
1️⃣ palpebral part - closes eyelids gently
2️⃣ orbital part- closes eyelids tightly
Superior part -innervated by temporal nerve
Inferior part- innervated by zygomatic nerve
