1. Fig. 12 A. Fasciculus gracilis B. Fasciculus cuneatus
Thalamic radiations to lower limb area of postcentral gyrus
Thalamic radiations to upper limb area of postcentral gyrus
Dorsal columns convey well-localized touch, pressure and vibratory sense from legs (fasciculus gracilis) and arms (fasciculus cuneatus)
Third order neuron in ventral postero-lateral nucleus of thalamus
Third order neuron in ventral postero-lateral nucleus of thalamus
Second order fibers in dorsolateral part of medial lemniscus in pons & midbrain
Second order fibers in ventromedial part of medial lemniscus in pons & midbrain
Synapse with second order neuron in the cuneate nucleus
Second order fibers in dorsal part of medial lemniscus in medulla
Synapse with second order neuron in the gracile nucleus
Second order fibers in ventral part of medial lemniscus in medulla
Internal arcuate fibers are second order fibers that decussate
Internal arcuate fibers are second order fibers that decussate
First order fiber ascends spinal cord in fasciculus cuneatus
First order fiber ascends spinal cord in fasciculus gracilis
First order neuron in cervical dorsal root ganglion
First order neuron in lumbar dorsal root ganglion
Cervical cord
Lumbar cord
Fig. 12