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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
SMART Vocabulary: related words and phrases

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 nerve


trochlear nerve
The trochlearnerve is unique among the cranial nerves in several respects.
From
Wikipedia

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This is due to impairment in the superior oblique muscle innervated by the trochlearnerve.
From
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More rarely, the oculomotor nerve and trochlearnerve (third and fourth nerve palsy, respectively) are affected; both play a role in eye movements.
From
Wikipedia

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By 1998, there had been only one reported case of compression of the trochlearnerve by vessels.
From
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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

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The oculomotor nerve comes out between the peduncles, and the trochlearnerve is visible wrapping around the outside of the peduncles.
From
Wikipedia

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Other names for fourth nerve palsy include superior oblique palsy and trochlearnerve palsy.
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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.
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Wikipedia

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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.
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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.
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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.
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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.
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It sometimes receives a filament from the trochlearnerve, but this is possibly derived from the branch that goes from the ophthalmic to the trochlearnerve.
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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.
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Wikipedia

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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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