| 词汇 | trochlear-nerve |
| 释义 | trochlear nerve noun[ C ] anatomy specializeduk /ˌtrɒk.li.ə ˈnɜːv/ us /ˌtrɑːk.li.ɚ ˈnɝːv/ either of the nerves that control certain muscles of the eye滑车神经 The brain & nervous system abducens nerve abducent nerve accessory nerve alexithymia allism glossopharyngeal nerve grey matter hemispheric hemispherical hindbrain neurofibrillary neurogenic neurogenically neuroglia neuroglial reinnervation reticular formation rhinencephalon rhombencephalon right brain Examples of trochlear nervetrochlear nerve The trochlearnerve is 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 the trochlearnerve. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. More rarely, the oculomotor nerve and trochlearnerve (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 the trochlearnerve by vessels. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The trochlearnerve supplies 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 the trochlearnerve is 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 and trochlearnerve palsy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. On either side of this band the trochlearnerve emerges, 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 or trochlearnerve), 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 the trochlearnerve) 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 the trochlearnerve resulting 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 the trochlearnerve each 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 the trochlearnerve, but this is possibly derived from the branch that goes from the ophthalmic to the trochlearnerve. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. To compensate for this, patients with trochlearnerve palsies 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 the trochlearnerve, 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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