Pain in the newborn
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6th week Dorsal horn neurons form synapses with the developing sensory neurons
11th week Sensory endings reach the skin of the limbs
20th week Sensory endings reach the whole skin
24th week Anatomical development of the pain pathways with the formation of the spinal-reticular substance projections of the thalamus and the midbrain → medulla oblongata- periaqueductal substance-ipothalamus → cortex
30th week The organization of the laminar structure of the dorsal horns (Redex’s laminae), started during the 13th week, is complete.
Recommended use of non-pharmacological measures for puncture procedures in neonates and infants