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spinal trigeminal nucleus การใช้

ประโยคมือถือ
  • Within the spinal trigeminal nucleus, information is represented in an onion-skin fashion.
  • It is caused by an underlying collection of gray matter known as the spinal trigeminal nucleus.
  • The spinal trigeminal nucleus contains a pain-temperature sensory map of the face and mouth.
  • From the spinal trigeminal nucleus, secondary fibers cross the midline and ascend in the trigeminothalamic ( quintothalamic ) tract to the contralateral thalamus.
  • The spinal trigeminal nucleus sends pain-temperature information to the thalamus and sends information to the mesencephalon and the reticular formation of the brainstem.
  • Damage to the spinal trigeminal nucleus causes absence of pain on the ipsilateral side of the face, as well as an absent corneal reflex.
  • The principal nucleus contains a touch-position sensory map of the face and mouth, just as the spinal trigeminal nucleus contains a complete pain-temperature map.
  • After entering the pons the central projections of the first order neurons descend to the medulla, forming the spinal trigeminal tract and synapse in the spinal trigeminal nucleus.
  • The neural regions involved in the sneeze reflex are located in the brainstem along the ventromedial part of the spinal trigeminal nucleus and the adjacent pontine-medullary lateral reticular formation.
  • The intermediate and deep layers also receive input from the spinal trigeminal nucleus, which conveys somatosensory information from the face, as well as the hypothalamus, zona incerta, thalamus, and inferior colliculus.
  • The parts of the trigeminal nucleus receive different types of sensory information; the spinal trigeminal nucleus receives pain-temperature fibers, the principal sensory nucleus receives touch-position fibers and the mesencephalic nucleus receives proprioceptor and mechanoreceptor fibers from the jaws and teeth.
  • C = Cervical segment, S = Sacral segment, VPL = Ventral posterolateral nucleus, SI = Primary somatosensory cortex, VM = Ventromedial prefrontal cortex, MD = Medial dorsal thalamic nucleus, IL = Intralaminar nucleus, VPM = Ventral posteromedial nucleus, Main V = Main trigeminal nucleus, Spinal V = Spinal trigeminal nucleus
  • Lesions which destroy lower areas of the spinal trigeminal nucleus ( but spare higher areas ) preserve pain-temperature sensation in the nose ( V 1 ), upper lip ( V 2 ) and mouth ( V 3 ) and remove pain-temperature sensation from the forehead ( V 1 ), cheeks ( V 2 ) and chin ( V 3 ).
  • Other output regions include : the ventromedial hypothalamus, medial and lateral septal nuclei, central medial amygdala, zona incerta, periaqueductal gray matter, lateral habenula, diagonal band, substantia innominata ( contains the nucleus basalis ), stria terminalis, prefrontal cortex, various brain stem substructures, including the rostral ventromedial medulla, rostral ventrolateral medulla, nucleus ambiguus, solitary nucleus, spinal trigeminal nucleus, pontine micturition center, ventral respiratory group, and pontine respiratory group ), area postrema, and dorsal nucleus of vagus nerve.