The superior oblique muscle is supplied by the Trochlear Nerve, also known as Cranial Nerve IV. Here are the steps to understand this:

1. The Trochlear Nerve originates in the midbrain, which is part of the brainstem. It is the smallest cranial nerve and the only one that arises from the back (dorsal) aspect of the brainstem.

2. The nerve fibers from the Trochlear nucleus run dorsally and caudally to decussate in the superior medullary velum, a thin sheet of neurons. After decussation, they emerge from the brainstem at the level of the inferior colliculus.

3. The Trochlear Nerve then courses anteriorly and laterally around the brainstem, running in the subarachnoid space over the cerebellum.

4. It enters the cavernous sinus and runs along the lateral wall of the sinus, above the ophthalmic division of the trigeminal nerve.

5. The nerve then enters the orbit through the superior orbital fissure, outside the tendinous ring of

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The superior oblique muscle is supplied by the Trochlear Nerve, also known as Cranial Nerve IV. Here are the steps to understand this:

1. The Trochlear Nerve originates in the midbrain, which is part of the brainstem. It is the smallest cranial nerve and the only one that arises from the back (dorsal) aspect of the brainstem.

2. The nerve fibers from the Trochlear nucleus run dorsally and caudally to decussate in the superior medullary velum, a thin sheet of neurons. After decussation, they emerge from the brainstem at the level of the inferior colliculus.

3. The Trochlear Nerve then courses anteriorly and laterally around the brainstem, running in the subarachnoid space over the cerebellum.

4. It enters the cavernous sinus and runs along the lateral wall of the sinus, above the ophthalmic division of the trigeminal nerve.

5. The nerve then enters the orbit through the superior orbital fissure, outside the tendinous ring of

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The superior oblique muscle is supplied by the Trochlear Nerve, also known as Cranial Nerve IV. Here are the steps to understand this:

1. The Trochlear Nerve originates in the midbrain, which is part of the brainstem. It is the smallest cranial nerve and the only one that arises from the back (dorsal) aspect of the brainstem.

2. The nerve fibers from the Trochlear nucleus run dorsally and caudally to decussate in the superior medullary velum, a thin sheet of neurons. After decussation, they emerge from the brainstem at the level of the inferior colliculus.

3. The Trochlear Nerve then courses anteriorly and laterally around the brainstem, running in the subarachnoid space over the cerebellum.

4. It enters the cavernous sinus and runs along the lateral wall of the sinus, above the ophthalmic division of the trigeminal nerve.

5. The nerve then enters the orbit through the superior orbital fissure, outside the tendinous ring of

Nerve supply of superior oblique muscle

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