The splanchnic nerves have various origins and the patterns in their formation.
Edwards and Baker(1940) reported that the most frequent origins of the greater splanchnic nerves were 8th and 9th thoracic sympathetic ganglia and the highest ,percent of greater splanchnic nerves arose from only 3 ganglia. He also emphasized the need for a more careful consideration in variability of patterns of the splanchnic nerves. Reed (1951) had determined the origins and sources of the greater splanchnic :nerves varied in 58 patterns.
The purpose of. this investigation is to observe the variations of the origins and the patterns of the splanchnic nerves in 65 cadavers in Korean. The results of the study are as. follows:
1. The greater splanchnic nerve was present in 1001/0c of the cases, the lesser :splanchnic . nerve in 96.2%, and . the lowest splanchnic nerve in 46.90/0.
2. The greater splanchnic nerves revealed the variations in origins from the 4th ´to the 11th thoracic sympathetic ganglia, the lesser splanchnic nerves from the 8th -to the 12th, and the lowest splanchnic nerves from the 10th to the 12th thoracic ganglia.
3. The most frequent origins of the greater splanchnic nerves were 3 ganglia from the 7th (80.8´%), the 8th (80.0 %) and the 9th (74.6 %) thoracic sympathetic ,ganglia; of the lesser were 2 ganglia from the 10th (57.6%) and the 11th (67.2%); and of the lowest was 1 ganglion from the 12th ganglion (83.6% ).
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