| 单词 | trochlear nerve |
| 释义 | trochlear nerve noun[C] anatomyspecializeduk/ˌtrɒk.li.ə ˈnɜːv/us/ˌtrɑːk.li.ɚ ˈnɝːv/either of thenervesthatcontrolcertainmusclesof theeye 滑车神经The brain & nervous system
Examplesoftrochlear nervetrochlear nerve Thetrochlearnerveis unique among the cranial nerves in several respects. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.This is due to impairment in the superior oblique muscle innervated by thetrochlearnerve. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.More rarely, the oculomotor nerve andtrochlearnerve(third and fourth nerve palsy, respectively) are affected; both play a role in eye movements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.By 1998, there had been only one reported case of compression of thetrochlearnerveby vessels. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Thetrochlearnervesupplies the superior oblique muscle, and when this muscle is non-functional (as in trochlear palsy) the eye "excyclotorts"; i.e. twists/rotates outward. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The oculomotor nerve comes out between the peduncles, and thetrochlearnerveis visible wrapping around the outside of the peduncles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Other names for fourth nerve palsy include superior oblique palsy andtrochlearnervepalsy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.On either side of this band thetrochlearnerveemerges, and passes forward on the lateral aspect of the cerebral peduncle to reach the base of the brain. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The eye will be displaced downward, because the superior oblique (innervated by the fourth cranial ortrochlearnerve), is unantagonized by the paralyzed superior rectus, inferior rectus and inferior oblique. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Damages to these structures produce the ipsilateral presentation of paralysis or palsy due to the lack of cranial nerve decussation (aside from thetrochlearnerve) before innervating their target muscles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Superior oblique myokymia is an uncommon neurological condition caused by vascular compression of thetrochlearnerveresulting in repeated, brief, involuntary episodes of movement of the eye. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.More over, while the abducens and thetrochlearnerveeach innervate one specific muscle, the oculomotor nerve has many functions including eyelid retraction and pupil constriction. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.It sometimes receives a filament from thetrochlearnerve, but this is possibly derived from the branch that goes from the ophthalmic to thetrochlearnerve. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.To compensate for this, patients withtrochlearnervepalsies tilt their heads to the opposite side, in order to fuse the two images into a single visual field. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The unique features of thetrochlearnerve, including its dorsal exit from the brainstem and its contralateral innervation, are seen in the primitive brains of sharks. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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