trigeminal nucleus การใช้

• All sensory fibers from these nerves terminate in the trigeminal nucleus.
• There is a concentrated nerve center in this area called the trigeminal nucleus.
• 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.
• For example, cells in the main trigeminal nucleus ( Main V in the diagram below ) receive input from the reticular formation and cerebral cortex.
• 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 paralemniscal pathway runs from the interpolar trigeminal nucleus via posterior nucleus ( POm ) of the thalamus to S2 and to diffuse targets in barrel cortex especially layer 5.
• 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 spinal counterparts of the trigeminal nucleus ( cells in the dorsal horn and dorsal column nuclei of the spinal cord ) contain a sensory map of the rest of the body.
• The trigeminal nucleus extends throughout the brainstem, from the midbrain to the medulla, continuing into the cervical cord ( where it merges with the dorsal horn cells of the spinal cord ).
• In sensory transduction, the afferent nerves transmit through a series of synapses in the central nervous system, first in the spinal cord or trigeminal nucleus, depending on the dermatomic area concerned.
• On entering the brainstem, sensory fibers from V, VII, IX and X are sorted and sent to the trigeminal nucleus ( which contains a sensory map of the face and mouth ).
• 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.
• In the lemniscal pathway, axons from the principal trigeminal nucleus cross over the midline and project to  barreloids in the thalamus, specifically in the dorsomedial section of the ventroposterior medial nucleus ( VPMdm ).
• Although analgesia in this distribution is " nonphysiologic " in the traditional sense ( because it crosses several dermatomes ), this analgesia is found in humans after surgical sectioning of the spinal tract of the trigeminal nucleus.