25 Questions
Which muscle is responsible for depressing the angle of the mouth?
Depressor anguli oris
What is the name of the muscle that is responsible for elevating the upper lip?
Levator labii superioris
Which muscle is responsible for depressing the lower lip?
Depressor labii inferioris
What is the name of the muscle that is responsible for puckering the lips?
Buccinator
Which muscle is responsible for elevating the angle of the mouth?
Levator anguli oris
What is the insertion point of the deltoid and pectoralis major fascia?
Epicranial aponeurosis
What is the path followed by the deltoid and pectoralis major fascia around the eye?
Circular path
What is the structure where the skin of the eyebrow is connected?
Epicranial aponeurosis
What is the anatomical location where the skin is at an angle?
At the angles of the mouth
What is the location of the fibers of orbicularis oris?
At the angles of the mouth
What is the commonality among the structures mentioned?
They are all connected to the skin
What is the main characteristic of the skin at the angles of the mouth?
It has orbicularis oris fibers
What is the relationship between the skin at the corner of the mouth and the skin at the angles of the mouth?
They are adjacent
What is the location of the skin that is closely related to the orbicularis oris fibers?
At the angles of the mouth
What is the characteristic of the skin of the lower lip?
It has orbicularis oris fibers
What is the action of the muscle that draws the scalp anteriorly and posteriorly?
Raises the eyebrows
Which part of the face is not directly related to the listed actions?
Nose
What is the action of the muscle that draws the eyebrows infer?
Lowers the eyebrows
Which facial feature is mentioned as being drawn anteriorly and posteriorly?
Scalp
What is the action of the muscle that moves the mandible?
Moves the mandible
What is the action of the frontalis muscle?
Elevating the eyebrow
Which action is responsible for opening the mouth?
Depression of the mandible
What is the effect of the procerus muscle on the nose?
It depresses the nose
What is the relationship between the frontalis muscle and the epicranial aponeurosis?
The frontalis muscle is part of the epicranial aponeurosis
What is the action of the muscle that draws the angle of the mouth inferiorly?
It depresses the mandible
Study Notes
Fascia and Insertion Points
- Deltoid and Pectoralis major fascia are insertion points for certain muscles.
Facial Muscles and Their Actions
- Epicranial aponeurosis is inserted by the Frontalis muscle.
- The Risorius muscle inserts into the skin at the angles of the mouth.
- The Buccinator muscle inserts into the skin of the cheek and angles of the mouth.
- The Orbicularis oris muscle inserts into the skin at the corners of the mouth and lower lip.
- The Levator labii superioris muscle inserts into the upper lip.
- The Levator anguli oris muscle inserts into the skin at the angles of the mouth.
- The Depressor labii inferioris muscle inserts into the lower lip.
- The Depressor anguli oris muscle inserts into the skin at the angles of the mouth.
- The Mentalis muscle inserts into the skin of the chin.
Muscle Actions
- The Frontalis muscle and epicranial aponeurosis draw the scalp anteriorly and posteriorly.
- The Procerus muscle draws the eyebrows inferiorly.
- The Orbicularis oris muscle draws the angle of the mouth inferiorly.
- The Mentalis muscle elevates the skin of the chin upwards, as in eating, and depresses the mandible.
Test your knowledge of the muscles responsible for facial expressions. This quiz covers the buccinator, risorius, orbicularis oris, and more. Identify the functions and locations of these essential muscles.
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