Final Answer:
CNV2, which is the Trigeminal nerve's Maxillary division, supplies the skin of the lateral nose, lower eyelid, and upper lip of the mouth. Thus, the correct answer is option a.
Explanation:
The Trigeminal nerve (CNV) is responsible for sensory innervation of the face. Its ophthalmic division (CNV1) primarily supplies sensation to the upper face, while the Maxillary division (CNV2) covers the middle face, including the lateral nose, lower eyelid, and upper lip of the mouth. CNV2 extends its sensory branches to these specific areas, making it the nerve supplying sensation to the skin in these regions (option a).
Understanding the anatomical distribution of the Trigeminal nerve divisions helps identify which areas of the face each division innervates. CNV2's territory includes the lateral nose, lower eyelid, and upper lip of the mouth, aligning with the areas mentioned in the question. This distribution pattern enables clinicians to pinpoint the nerve responsible for sensation in distinct facial regions, aiding in diagnostic assessments and treatment planning for various facial conditions related to sensory perception.
Differentiating between the Trigeminal nerve divisions is crucial for healthcare practitioners when evaluating facial sensation or diagnosing conditions affecting specific facial areas. In this case, recognizing CNV2, the Maxillary division of the Trigeminal nerve, as the supplier of sensation to the lateral nose, lower eyelid, and upper lip of the mouth is essential for accurate clinical assessments and understanding the sensory innervation of the face.