What is the function of the zygomaticus minor and major muscles?
Zygomaticus minor muscle
| Origin | (Anterior part of) Lateral aspect of zygomatic bone |
|---|---|
| Insertion | Blends with muscles of upper lip (medial to zygomaticus major muscle) |
| Action | Elevates upper lip, exposes maxillary teeth |
| Innervation | Zygomatic and buccal branches of facial nerve (CN VII) |
What is the action of the zygomaticus minor muscle?
It draws the upper lip backward, upward, and outward (used in making sad facial expressions). Like all muscles of facial expression, it is innervated by the facial nerve (CN VII).
What muscles help you smile?
Zygomatic muscles (major and minor) – move the mouth corners up and outward when we smile. Risorius – the “smile” muscle. Pulls mouth corners laterally (outward) and forms dimples in the cheeks. This muscle is not always active in all people.
How do you work out zygomaticus?
This exercise targets the muscle that helps to protrude the lower lip and inferiorly draw it in. Stick the lower lip out and draw it into a pout position. Hold for five seconds before relaxing. Repeat the exercise a total of 10 times.
What is the action of the risorius?
The risorius muscle’s function is to aid in facial expression by pulling the corner of the mouth laterally via its contraction in an outward and upward motion. In conjunction with other facial muscles, this helps to create a smile or a frown, and myriad other expressions in-between.
What is the function of the levator labii superioris?
The levator labii superioris muscle, also known as the quadratus labii, contributes to facial expression and movement of the mouth and upper lip. It courses alongside the lateral aspect of the nose, and its primary function is elevation of the upper lip.
What is the function of the levator Labii Superioris?
What are the benefits of smiling?
Smiling not only offers a mood boost but helps our bodies release cortisol and endorphins that provide numerous health benefits, including:
- Reduced blood pressure.
- Increased endurance.
- Reduced pain.
- Reduced stress.
- Strengthened immune system.
What is the kissing muscle called?
orbicularis oris
A ring of muscle encircling your mouth and anchored in your lips, the orbicularis oris (aka the “kissing muscle”) allows you to pucker and close your lips. The orbicularis oris also helps you to release air from the mouth forcibly.
How do you strengthen zygomaticus muscles?
Lip pucker This exercise helps to firm the muscles controlling the lip movements. Pucker the lips into a whistling or kissing position. Hold the pose for a five count before repeating for a total of 10 repetitions.
What does risorius mean?
Medical Definition of risorius : a narrow band of muscle fibers arising from the fascia over the masseter muscle, inserted into the tissues at the corner of the mouth, and acting to retract the angle of the mouth.
What is the function of the zygomaticus major muscle?
The zygomaticus major muscle is also known as musculus zygomaticus major and the greater zygomatic muscle, as well as musculus zygomaticus. The zygomaticus major muscle receives nerves from cranial nerve VII. Conditions that may affect the zygomaticus major muscle include myalgia strains, neuromuscular diseases, lacerations,…
Is the zygomaticus part of the facial nerve?
Like all muscles of facial expression, the zygomatic major is innervated by the facial nerve (the seventh cranial nerve), more specifically, the buccal and zygomatic branches of the facial nerve. Muscles of the head, face, and neck. Zygomaticus major shown in red.
Where is the attachment point of the zygomaticus minor?
This attachment point is located lateral to zygomaticus minor and medial to risorius muscles. Here, zygomaticus major interlaces with other muscles that converge towards the angle of the mouth, forming a dense, mobile, fibromuscular mass called the modiolus.
Where does the zygomaticus major artery run?
Zygomaticus major courses diagonally over the anterior surfaces of the buccinator and masseter muscles. The facial artery and its accompanying vein run between the buccinator and zygomaticus major muscles.