The first appearance of sympathetic ganglia in human embryos at stage 13.
The primordia of the sympathetic trunk ganglia were traced on serial sections of 10 embryos at stage 13 (32 postovulatory days). It was found that in all embryos, these primordia were present in the thoracic level T4 to T9 and they appeared as scattered aggregates of cells lying dorsally and laterally to the dorsal aortae.
Woźniak
W
W
Department of Anatomy, Poznań University of Medical Sciences, Swiecickiego 6, 60-781 Poznań, Poland. wwozniak@ump.edu.pl
Grzymisławska
M
M
Lupicka
J
J
D001011:Aorta / Q000196:embryology / Q000294:innervation; D004622:Embryo, Mammalian / Q000098:blood supply / Q000294:innervation*; D005728:Ganglia, Sympathetic / Q000196:embryology*; D006801:Humans; D055495:Neurogenesis; D013904:Thoracic Vertebrae / Q000196:embryology