Nasalis muscle
Nasalis muscle
The Nasalis muscle (pronunciation: /nəˈseɪlɪs ˈmʌsəl/) is a facial muscle that is primarily responsible for the "flaring" of the nostrils. It is part of the muscles of facial expression and is found in the human anatomy.
Etymology
The term "Nasalis" is derived from the Latin word "nasus", which means "nose". The term "muscle" comes from the Latin "musculus", meaning "little mouse", which is a reference to the appearance and movement of certain muscles.
Structure
The Nasalis muscle is divided into two parts: the transverse part and the alar part. The transverse part compresses the nostrils, while the alar part pulls the nostrils open. This muscle is located in the nasal region of the face, overlying the nasal bone and cartilage.
Function
The primary function of the Nasalis muscle is to control the width of the nostrils. This is particularly important during heavy exercise, when the demand for oxygen is increased. The Nasalis muscle allows for the nostrils to widen, increasing the amount of air that can be inhaled through the nose.
Related Terms
See Also
External links
- Medical encyclopedia article on Nasalis muscle
- Wikipedia's article - Nasalis muscle
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