## **Core Concept**
The muscles of the nose include those that help in movements such as flaring and depressing the ala of the nose, and are primarily innervated by the facial nerve (cranial nerve VII). These muscles play a crucial role in controlling the nostrils' size, which affects breathing.

## **Why the Correct Answer is Right**
The dilator naris muscle helps in flaring the nostrils, the compressor naris muscle aids in depressing the ala of the nose and constricting the nostrils, and the procerus muscle assists in drawing the eyebrows down and wrinkling the skin of the forehead. The **levator labii superioris** muscle, however, primarily functions to elevate the upper lip and is not classified as a muscle of the nose but rather as one of the muscles of facial expression that acts on the mouth.

## **Why Each Wrong Option is Incorrect**
* **Option A:** The **procerus** muscle is indeed a muscle associated with the nose; it helps to pull the eyebrows down and is innervated by the facial nerve.
* **Option B:** The **dilator naris** muscle aids in flaring the nostrils and is considered one of the muscles of the nose.
* **Option C:** The **compressor naris** muscle helps in constricting the nostrils and is a muscle of the nose.

## **Clinical Pearl / High-Yield Fact**
A clinically relevant point to remember is that the muscles of the nose are innervated by the facial nerve (cranial nerve VII). Damage to this nerve can result in weakness or paralysis of these muscles, affecting nasal function.

## **Correct Answer:** . Levator labii superioris