cranial nerve
noun
- Anatomy each of twelve pairs of nerves which arise directly from the brain, not from the spinal cord, and pass through separate apertures in the skull【剖】颅神经。
They are (with conventional roman numbering) the olfactory (I), optic （Ⅱ）, oculomotor (III), trochlear （Ⅳ）, trigeminal （Ⅴ）, abducens （Ⅵ）, facial （Ⅶ）, vestibulocochlear （Ⅷ）, glossopharyngeal （Ⅸ）, vagus （Ⅹ）, accessory （Ⅺ）,and hypoglossal （Ⅻ） nerves.