SENSORY TRACT PATHWAYS Flashcards
Light touch from the face pathway
Cell body of 1st order neuron- trigeminal ganglion
Synapses- main sensory nucleus of pons
Cell body of 2nd order neuron- main sensory nucleus of pons
Synapses- VPM of thalamus
Cell body of 3rd order neuron- VPM of thalamus
Synapses- lateral primary somatosensory cortex
Nociception/temp from the face pathway
Cell body of 1st order neuron- trigeminal ganglion
Synapses- spinal trigeminal nucleus of lower medulla
Cell body of 2nd order neuron- spinal trigeminal nucleus of lower medulla
Synapses- VPM of thalamus
Cell body of 3rd order neuron- VPM of thalamus
Synapses- lateral primary somatosensory cortex
DCML pathway (UE and LE differences)
Cell body of 1st order neuron- DRG
Synapses- nucleus Gracilis/cutaneus of medulla
Cell body of 2nd order neuron- nucleus Gracilis/cutaneus of medulla
Synapses- VPL of thalamus
Cell body of 3rd order neuron- VPL of thalamus
Synapses- primary somatosensory cortex (superolateral or medial)
Lateral spinothalamic pathway
Cell body of 1st order neuron- DRG
Synapses- dorsal horn
Cell body of 2nd order neuron- dorsal horn
Synapses- VPL of thalamus
Cell body of 3rd order neuron- VPL of thalamus
Synapses- primary somatosensory cortex
Where does the tract always dessacate at?
Cell body of 2nd order neuron
Where are the parts of the anterior spinothalamic tract?
Spinoreticular
Spinomesencephalic
Spinolimbic (emotional)
What is the function of the anterior spinothalamic tract?
Slow pain
Where does the spinoreticular tract terminate?
Reticular formation
Where does the Spinomesencephalic tract terminate?
Midbrain
Where does the spinoemotional tract terminate?
Amygdala, insular cortex, and ventral striatum
What is the function of the spinocerebellar tract?
Unconscious proprioception
Where does the spinocerebellar tract terminate?
Cerebellum
What is the function of the Spinomesencephalic tract?
Turn head towards pain
What is the function of the Spinoreticular tract?
Modulate arousal, attention, and sleep/wake cycles
What is the function of the spinoemotional tract?
Emotional response to pain
