somatosensory systems overview Flashcards Preview

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Flashcards in somatosensory systems overview Deck (5):
1

dorsal column/medial lemniscal

Sense types: discriminative touch, proprioception, vibration, pressure
Location of 1st order cell bodies: DRG
Sensory homunculus location: postcentral gyrus
Thalamic nucleus: VPL

2

spinothalamic

Sense types: diffuse light touch, fast pain, temperature
Location of 1st order cell bodies: DRG
Sensory homunculus location: postcentral gyrus
Thalamic nucleus:

3

trigeminothalamic 1

Sense types: discriminative touch, proprioception, vibration, pressure
Location of 1st order cell bodies: trigeminal ganglion
Sensory homunculus location: primary somatosensory cortex (PCG)
Thalamic nucleus: VPM

4

trigeminothalamic 2

Sense types: diffuse light touch, fast (sharp) pain, temperature
Location of 1st order cell bodies: trigeminal ganglion
Sensory homunculus location: somatosensory cortex (PCG)
Thalamic nucleus: VPM

5

spinoreticular system

-C type fibers
-poorly localized, slow, burning pain
-no somatatopy
-centromedian nucleus of thalamus