The nose contains several small muscles that control its shape and movement, primarily related to facial expressions and breathing. Here's a breakdown of these muscles:
Key Muscles of the Nose
| Muscle Name | Function |
|---|---|
| Nasalis Muscle | The largest nasal muscle, responsible for wrinkling the nose. |
| Compressor Naris Muscle | Part of the nasalis, constricts the nostrils. |
| Dilator Naris Muscle | Part of the nasalis, widens the nostrils. |
| Procerus Muscle | Pulls the skin between the eyebrows down, contributing to frowning. |
| Myrtiformis Muscle | Depresses the nasal septum and the nasal alar cartilage. |
| Depressor Septi Nasalis Muscle | Pulls the nasal septum downwards. |
| Levator Labii Superioris Alaeque Nasalis Muscle | Elevates the upper lip and flares the nostrils. |
Supporting Muscles
While not solely located in the nose, the Orbicularis Oris Muscle plays an indirect role.
- Orbicularis Oris Muscle: This muscle is the main muscle of the mouth but it contributes to facial expressions that involve the nose, for example when scrunching up your face.
Functions Explained
- Controlling Nostril Size: Muscles like the compressor naris and dilator naris, both part of the nasalis muscle, work together to adjust the size of the nostrils during breathing and emotional expressions.
- Facial Expressions: Muscles such as the procerus, myrtiformis, depressor septi nasalis, and levator labii superioris alaeque nasalis contribute to various facial expressions, like wrinkling the nose or flaring the nostrils.
Practical Insights
- Understanding these muscles is important in fields like facial reconstructive surgery and cosmetic procedures.
- Knowing which muscles are involved in specific expressions helps in the study of non-verbal communication and facial analysis.
