| NOUN | body | fourth cranial nerve, trochlear, trochlear nerve, trochlearis | either of the two cranial nerves on either side that control the superior oblique muscles of the eyes |
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| Meaning | Either of the two cranial nerves on either side that control the superior oblique muscles of the eyes. | |
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| Synonyms | trochlear, trochlear nerve, trochlearis | |
| Broader | cranial nerve | Any of the 12 paired nerves that originate in the brain stem |