Which cranial nerve is associated with the nasociliary nerve in the CTR mnemonic?

The nasociliary nerve is a branch of the ophthalmic division of the trigeminal nerve, which is cranial nerve V (CN5). In the context of the CTR mnemonic, which stands for the arrangement of structures near the optic nerve and describes the location of different cranial nerves and their branches, the nasociliary nerve is specifically linked to the trigeminal nerve.

Understanding the relationship between these nerves is vital as the nasociliary nerve serves a sensory function, providing innervation to various areas such as the nasal cavity and parts of the face. This insight into the anatomy of cranial nerves helps in recalling their functions and associations in clinical scenarios, making CN5 the correct answer in relation to the nasociliary nerve in the CTR mnemonic.