What is the name of Cranial Nerve IV?

Cranial Nerve IV is known as the Trochlear nerve. This nerve is primarily a motor nerve and is responsible for innervating the superior oblique muscle of the eye, which plays a crucial role in eye movement. Specifically, the trochlear nerve allows for the depression and inward rotation of the eyeball, enabling efficient coordination of visual tracking.

Understanding the function of the trochlear nerve is essential in clinical practice, especially when assessing conditions that may affect eye movements or cause double vision, referred to as diplopia. The trochlear nerve is the smallest cranial nerve but has a significant impact on ocular function, which illustrates the importance of correctly identifying it in the context of neuroanatomy and neurological assessments.