What is the location of the frontal belly of the occipitofrontalis muscle quizlet?
What is the insertion of the frontal belly of the occipitofrontalis muscle? Skin superior to supraorbital margin. You just studied 65 terms!
Which is the correct origination point of the frontal belly of occipitofrontalis muscle?
Occipitofrontalis Origin The frontal belly of the occipitofrontalis possesses no direct attachments to bone. Instead, the frontal belly originates from the anterior portion of the galea aponeurotica, the aponeurosis connecting the two bellies. The galea aponeurotica is located roughly at the hairline on the forehead.
Where is the occipitofrontalis muscle?
skull
The occipitofrontalis or epicranius is a muscle which covers parts of the skull. It consists of two parts or bellies: The occipital belly, near the occipital bone, and the frontal belly, near the frontal bone.
What attaches to the occipitofrontalis muscle?
The occipitofrontalis muscle attaches to the occiput and mastoid part of the temporal bone, the epicranial aponeurosis, and the temporal fascia attachment to the zygomatic arch. These attachments limit potential posterior and lateral spread of infections from the scalp.
What is the action of the frontal belly of the Occipitofrontalis?
Function. Occipitofrontalis muscle has several actions depending on which of its attachments is fixed; When its aponeurotic attachment is fixed, the frontal belly elevates the eyebrows and skin of the forehead, producing a facial expression of shock or surprise.
Which are actions of the occipital belly of the Occipitofrontalis?
The occipital belly alone is responsible for drawing back the galea aponeurotica. The occipital belly is also active during smiling and yawning, and can be active during the movements of the auricula.
What is the function of the occipitofrontalis?
Function. The occipitofrontalis muscle helps to create facial expressions. Assisted by the occipital belly, the frontal belly draws the scalp back, which raises the eyebrows and wrinkles the forehead.
What is the origin of the occipitofrontalis frontal belly?
Origin and insertion Occipitofrontalis muscle consists of two muscle bellies connected by epicranial aponeurosis that spans the dome of the skull. Frontal belly overlies the forehead and has no bony attachments. It originates from the lateral two-thirds of the superior nuchal lines of occipital bone.
What does the frontal belly of the epicranius do?
The occipitofrontalis muscle (epicranius muscle) is a muscle which covers parts of the skull….Occipitofrontalis muscle.
| Occipitofrontalis | |
|---|---|
| Artery | frontal belly: supraorbital and supratrochlear arteries occipital belly: occipital artery |
| Nerve | facial nerve |
| Actions | raises eyebrows, wrinkles forehead |
| Identifiers |
Which are actions of the frontal belly of the occipitofrontalis?
Upon contraction the frontal belly of the occipitofrontalis lifts the eyebrow and the upper eyelid, thus producing horizontal wrinkles of the forehead. Contractions of the muscle produce the facial expression of astonishment.
What is the action of the occipitofrontalis frontal belly?
Occipitofrontalis muscle
| Origin | Frontal belly (frontalis): Skin of eyebrow, muscles of forehead Occipital belly (occipitalis): (Lateral 2/3 of) superior nuchal line |
|---|---|
| Insertion | Epicranial aponeurosis |
| Action | Frontal belly: Elevates eyebrows, wrinkles skin of forehead Occipital belly: Retracts scalp |
What is the function of the epicranius muscle?
They can flex or extend the head, or can rotate the towards the shoulders. The epicranius muscle is also very broad and covers most of the top of the head.
Is the frontal belly part of the occipitofrontalis muscle?
This article will discuss the anatomy and function of occipitofrontalis muscle. Occipitofrontalis muscle consists of two muscle bellies connected by epicranial aponeurosis that spans the dome of the skull. Frontal belly overlies the forehead and has no bony attachments.
What kind of muscles are in the occipital bellies?
Together with temporoparietalis, it comprises the epicranial group of the muscles of facial expression. Occipitofrontalis consists of frontal and occipital bellies, each containing a pair of quadrangular muscle heads.
Where is the occipitofrontalis located in the scalp?
Occipitofrontalis is a long and wide muscle of the scalp, spanning from the eyebrows to the superior nuchal lines of occipital bones. Together with temporoparietalis, it comprises the epicranial group of the muscles of facial expression.
How is the anterior surface of the occipital belly crossed?
The anterior surface of the occipital belly is crossed by the greater occipital nerve and occipital artery. Both parts of the muscle are supplied by the facial nerve (CN VII) that gives off temporal branches for the frontal belly, and the posterior auricular nerve for the occipital belly.