Concha and Eminent Concha are supplied by
**Core Concept**
The nasal conchae are a pair of scroll-like structures within the nasal cavity, playing a crucial role in humidifying and warming the air we breathe. The conchae are divided into two types: the inferior nasal concha and the superior nasal concha.
**Why the Correct Answer is Right**
The nasal conchae are supplied by the anterior ethmoidal nerve, which is a branch of the ophthalmic division of the trigeminal nerve (V1). The anterior ethmoidal nerve provides sensory innervation to the nasal conchae, including the inferior and superior conchae, as well as the middle concha. The eminent concha, also known as the supreme concha, is a small, curved structure located above the superior concha and is also supplied by the anterior ethmoidal nerve.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the posterior ethmoidal nerve, another branch of the ophthalmic division of the trigeminal nerve, primarily supplies the posterior ethmoidal cells and the sphenoid sinus, not the nasal conchae.
* **Option B:** This option is incorrect because the external nasal nerve, a branch of the facial nerve (CN VII), primarily supplies the skin of the external nose, not the nasal conchae.
* **Option C:** This option is incorrect because the nasopalatine nerve, a branch of the maxillary division of the trigeminal nerve (V2), primarily supplies the palate and the nasal septum, not the nasal conchae.
**Clinical Pearl / High-Yield Fact**
Remember that the anterior ethmoidal nerve supplies the nasal conchae, including the inferior, superior, and middle conchae, as well as the eminent concha. This is an important consideration when performing nasal surgery or when evaluating patients with nasal symptoms.
**Correct Answer:** A. The anterior ethmoidal nerve supplies the nasal conchae, including the inferior, superior, and middle conchae, as well as the eminent concha.