trochlear nerve

A cranial nerve that runs to the eye muscles. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the trochlear nerve is

A cranial nerve that runs to the eye muscles. The atlas records it as a nerve at the organ scale in the human body.

Where the trochlear nerve is

It sits in the head, within the nervous system. Positioned deliberately as part of this species body plan.

What the trochlear nerve connects to

The atlas records 2 typed relationships for it, across 2 kinds of connection. a kind of cranial nerve.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the trochlear nerve. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as 4n, cranial nerve IV, fourth cranial nerve, nervus trochlearis [IV], superior oblique nerve and trochlear IV nerve, and 9 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001644, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: cranial nerve.
• Innervates: superior oblique extraocular muscle.

Questions

Where is the trochlear nerve?

It sits in the head, within the nervous system. Positioned deliberately as part of this species body plan.

What does the trochlear nerve connect to?

A kind of: cranial nerve.

Is the trochlear nerve the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.