Nasalis muscle

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Nasalis muscle
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The superior transverse part and inferior alar part of the nasalis muscle
Details
Origin Maxilla
Insertion Nasal bone
Artery Superior labial artery
Nerve Buccal branch of the facial nerve
Actions Compresses bridge of nose, depresses tip of nose, elevates corners of nostrils
Identifiers
Latin musculus nasalis
TA98 A04.1.03.009
TA2 2062
FMA 46770
Anatomical terms of muscle

The nasalis muscle is a sphincter-like muscle of the nose. It has a transverse part and an alar part. It compresses the nasal cartilages, and can "flare" the nostrils. It can be used to test the facial nerve (VII), which supplies it.

Contents

Structure

The nasalis muscle covers the nasal cartilages of the lower surface of the nose. [1] It consists of two parts, transverse and alar:

Nerve supply

Like all the other muscles of facial expression, the nasalis muscle is supplied by the facial nerve (VII). [3] [4]

Function

The nasalis muscle compresses the nasal cartilages. It may also "flare" the nostrils. [2]

Clinical significance

Cleft lip and cleft palate

The nasalis muscle is one of the key muscles not formed or inserted correctly with cleft lip and cleft palate deformity. [5] The head of the transverse part needs to be identified during reconstructive surgery so that it can be surgically sutured (connected) to the nasal septum. [2] [5] The origin at the maxilla may also be repositioned for better symmetry. [2]

Facial nerve testing

Due to it being superficial, the nasalis muscle can be used to test the facial nerve. [4] [6] Specifically, it can be used to test the zygomatic branches. [6]

Additional images

References

  1. Menick, Frederick J. (2009). "Small Superficial Defects — Secondary Intention Healing, Primary Repair, a Skin Graft or Local Flap". Nasal Reconstruction. pp. 65–90. doi:10.1016/B978-0-7020-3008-6.50010-7. ISBN   978-0-7020-3008-6. OCLC   460904328.
  2. 1 2 3 4 Attia, Sarah A.; Helal, Hesham A.; El Barabary, Amir S.; Awad, Mostafa A.; Sherif, Mahmoud M. (February 2019). "Impact of nasalis muscle repair in unilateral cleft lip patients". Journal of Cranio-Maxillofacial Surgery. 47 (2): 255–262. doi:10.1016/j.jcms.2018.11.030. PMID   30591393.
  3. "Nasalis". www.anatomynext.com. Archived from the original on 2018-03-01. Retrieved 2018-03-01.
  4. 1 2 Sanders, Donald B. (2012). "Electrophysiologic Study of Disorders of Neuromuscular Transmission". Aminoff's Electrodiagnosis in Clinical Neurology. pp. 385–406. doi:10.1016/B978-1-4557-0308-1.00017-0. ISBN   978-1-4557-0308-1. OCLC   793587054.
  5. 1 2 Drake, David; Colbert, Serryth (2017). "Techniques for Cleft Lip Repair". Maxillofacial Surgery. pp. 948–971. doi:10.1016/B978-0-7020-6056-4.00067-8. ISBN   978-0-7020-6056-4. OCLC   968339962.
  6. 1 2 Preston, David C.; Shapiro, Barbara E. (2013). "Facial and Trigeminal Neuropathy". Electromyography and Neuromuscular Disorders. pp. 372–383. doi:10.1016/B978-1-4557-2672-1.00025-8. ISBN   978-1-4557-2672-1. OCLC   821857515.