Middle superior alveolar nerve supplies upper premolar teeth. It is a branch of?
**Core Concept**
The middle superior alveolar nerve is a branch of the maxillary nerve that supplies the upper premolar teeth. It is a branch of the posterior superior alveolar nerve, which in turn is a branch of the maxillary nerve. This is part of the trigeminal nerve (cranial nerve V) innervation of the face and oral cavity.
**Why the Correct Answer is Right**
The middle superior alveolar nerve is a branch of the posterior superior alveolar nerve, which arises from the maxillary nerve. The maxillary nerve is a branch of the trigeminal nerve (cranial nerve V), specifically the ophthalmic and maxillary divisions. The posterior superior alveolar nerve is responsible for the innervation of the upper molars and premolars.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the middle superior alveolar nerve is not a branch of the inferior alveolar nerve, which is a branch of the mandibular nerve (cranial nerve V).
* **Option B:** This option is incorrect because the middle superior alveolar nerve is not a branch of the anterior superior alveolar nerve, which is also a branch of the maxillary nerve but supplies the upper incisors and canines.
* **Option D:** This option is incorrect because the middle superior alveolar nerve is not a branch of the lingual nerve, which is a branch of the mandibular nerve (cranial nerve V) and supplies the tongue.
**Clinical Pearl / High-Yield Fact**
It's essential to remember the trigeminal nerve's division into three branches: the ophthalmic nerve, maxillary nerve, and mandibular nerve, each supplying different areas of the face and oral cavity. This knowledge is crucial for understanding the innervation of the teeth and the management of dental and facial pain.
**Correct Answer:** C.