Spino-thalamic tract
Second order neuron cell body and
dendrites located in dorsal horn of
spinal cord
1
st
synapse
Second axon crosses cord ventrally
and enters the spino-thalamic tract
NEURON 2
Cell body in
dorsal root ganglion
2
nd
synapse
(with neuron in the thalamus)
Thalamo-cortical tract
NEURON 3
3
rd
synapse
(with cortical neuron)
Primary sensory neuron
NEURON 1
Sensory endings
Spinal
nerve
Somatosensory cortex
Thalamus
Internal capsule
Lentiform
nucleus
©KCL