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单词 cranial nerve
释义

cranial nerve


cranial nerve

n. Any of several nerves that arise in pairs from the brainstem and reach the periphery through openings in the skull. There are 12 such pairs in mammals, birds, and reptiles and usually 10 pairs in amphibians and fish.

cranial nerve

n (Anatomy) any of the 12 paired nerves that have their origin in the brain and reach the periphery through natural openings in the skull

cra′nial nerve`


n. any of the paired nerves arising from the brainstem and reaching the periphery through skull openings. [1830–40]

cranial nerve

Any of the 12 pairs of nerves in humans and other mammals that connect the muscles and sensory organs of the head and upper chest directly to the brain. The cranial nerves include the optic nerve and the auditory nerve.
Thesaurus
Noun1.cranial nerve - any of the 12 paired nerves that originate in the brain stemcranial nerve - any of the 12 paired nerves that originate in the brain stemnerve, nervus - any bundle of nerve fibers running to various organs and tissues of the bodyfirst cranial nerve, nervii olfactorii, olfactory nerve - a collective term for numerous olfactory filaments in the nasal mucosanervus opticus, optic nerve, optic tract, second cranial nerve - the cranial nerve that serves the retinanervus oculomotorius, oculomotor, oculomotor nerve, third cranial nerve - supplies extrinsic muscles of the eyefourth cranial nerve, trochlear, trochlear nerve, trochlearis - either of the two cranial nerves on either side that control the superior oblique muscles of the eyesfifth cranial nerve, nervus trigeminus, trigeminal, trigeminal nerve, trigeminus - the main sensory nerve of the face and motor nerve for the muscles of masticationabducens, abducens nerve, abducent, abducent nerve, nervus abducens, sixth cranial nerve - a small motor nerve supplying the lateral rectus muscle of the eyefacial, facial nerve, nervus facialis, seventh cranial nerve - cranial nerve that supplies facial musclesacoustic nerve, auditory nerve, eighth cranial nerve, nervus vestibulocochlearis, vestibulocochlear nerve - a composite sensory nerve supplying the hair cells of the vestibular organ and the hair cells of the cochleaglossopharyngeal nerve, nervus glossopharyngeus, ninth cranial nerve - sensory nerve to the pharynx and back of the tongue; motor fibers innervate muscles that elevate the pharynx and larynx; includes parasympathetic fibers to the otic ganglionnervus vagus, pneumogastric, pneumogastric nerve, tenth cranial nerve, vagus, vagus nerve, wandering nerve - a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal visceraaccessory nerve, eleventh cranial nerve, nervus accessorius, spinal accessory - arises from two sets of roots (cranial and spinal) that unite to form the nervehypoglossal, hypoglossal nerve, nervus hypoglosus, twelfth cranial nerve - supplies intrinsic muscles of the tongue and other tongue muscles

cranial nerve


cranial nerve

[′krān·ē·əl ′nərv] (neuroscience) Any of the paired nerves which arise in the brainstem of vertebrates and pass to peripheral structures through openings in the skull.

cranial nerve


cranial nerve

n. Any of several nerves that arise in pairs from the brainstem and reach the periphery through openings in the skull. There are 12 such pairs in mammals, birds, and reptiles and usually 10 pairs in amphibians and fish.
CRANIAL NERVES AND THEIR DISTRIBUTIONS

cranial nerve

Abbreviation: CN
Any of the twelve pairs of nerves that leave the cranial cavity through foramina in the skull and innervate the head. The cranial nerves are numbered in the order they contact the brain; from anterior to posterior, they are the olfactory (CN I), optic (CN II), oculomotor (CN III), trochlear (CN IV), trigeminal (CN V), abducens (CN VI), facial (CN VII), vestibulocochlear (CN VIII), glossopharyngeal (CN IX), vagus (CN X), spinal accessory (CN XI), and hypoglossal (CN XII) nerves. The central nuclei for all the cranial nerves, except the olfactory nerve, are in the brainstem. See: illustration

Diagnosis

Lesions of the cranial nerves give rise to the following alteration(s): First (CN I; olfactory): Loss of the sense of smell. Second (CN II; optic): Blindness in all or part of a visual field. Third (CN III; oculomotor): Ptosis (drooping) of the eyelid, deviation of the eyeball outward, immobility of the pupil, double vision. Fourth (CN IV; trochlear): Rotation of the eyeball upward and outward, double vision. Fifth (CN V; trigeminal):

Sensory

Pain or loss of sensation in the face

Motor

Weakness of the jaw, difficulty chewing. Sixth (CN VI; abducens): Deviation of the eye outward, double vision. Seventh (CN VII; facial): Paralysis of muscles of facial expression. Eighth (CN VIII; vestibulocochlear): Deafness; ringing in the ears; dizziness; nausea and vomiting; reeling. Ninth (CN IX; glossopharyngeal): Disturbance of taste; difficulty in swallowing; loss of gag reflex. Tenth (CN X; vagus): hoarseness; difficulty swallowing; autonomic disturbances of the viscera.Eleventh (CN XI; spinal accessory): Drooping of the shoulder; inability to rotate the head. Twelfth (CN XII; hypoglossal): Paralysis of the tongue, deviation of the tongue toward one side; thick speech.

See also: nerve

cranial nerve

one of 10 (in ANAMNIOTES) or 12 (in AMNIOTES) peripheral nerves that emerge from the vertebrate brain as distinct from the spinal cord, passing through holes in the skull to innervate structures in the head, neck and upper body.
FinancialSeeCNEncyclopediaSeec/n

cranial nerve


  • noun

Words related to cranial nerve

noun any of the 12 paired nerves that originate in the brain stem

Related Words

  • nerve
  • nervus
  • first cranial nerve
  • nervii olfactorii
  • olfactory nerve
  • nervus opticus
  • optic nerve
  • optic tract
  • second cranial nerve
  • nervus oculomotorius
  • oculomotor
  • oculomotor nerve
  • third cranial nerve
  • fourth cranial nerve
  • trochlear
  • trochlear nerve
  • trochlearis
  • fifth cranial nerve
  • nervus trigeminus
  • trigeminal
  • trigeminal nerve
  • trigeminus
  • abducens
  • abducens nerve
  • abducent
  • abducent nerve
  • nervus abducens
  • sixth cranial nerve
  • facial
  • facial nerve
  • nervus facialis
  • seventh cranial nerve
  • acoustic nerve
  • auditory nerve
  • eighth cranial nerve
  • nervus vestibulocochlearis
  • vestibulocochlear nerve
  • glossopharyngeal nerve
  • nervus glossopharyngeus
  • ninth cranial nerve
  • nervus vagus
  • pneumogastric
  • pneumogastric nerve
  • tenth cranial nerve
  • vagus
  • vagus nerve
  • wandering nerve
  • accessory nerve
  • eleventh cranial nerve
  • nervus accessorius
  • spinal accessory
  • hypoglossal
  • hypoglossal nerve
  • nervus hypoglosus
  • twelfth cranial nerve
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更新时间:2024/11/12 0:31:24