The cranial nerves are a set of twelve pairs of nerves that travel to and from the brain. Each has a different function. For example, the olfactory nerve is essential for detecting smells. The ...

The trochlear nerve is also known as cranial nerve IV (CN-IV). It is the only cranial nerve that emerges dorsally from the brain (near the back), giving it the longest pathway. It is the smallest ...

Cranial neuropathy occurs when there is damage to the cranial nerves in the brain or brain stem. Depending on the affected cranial nerve, people may experience different symptoms, such as weakness on ...