Volume 1
On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag.
- Sonntag, Charles F. (Charles Frederick), -1925
- Date:
- 1923
Licence: In copyright
Credit: On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag. Source: Wellcome Collection.
91/118 page 411
![Nerve. . Bolk. Hepburn. Champneys. Self. Ilio-hypogastric ... Dxiii. Dxiii. Not recorded. I) xiii. D xiii. Ilio-inguinal D xiii. D xiii. L 1 LI D xiii. LI Genito-crural LI I) xiii. LI Anterior crural L 1, 2, 3 L1, L 2, L 3 D xiii., L 1, L 2, L 3 LI, L2, L3 Lateral cutaneous... LI, 2 L 2, L 3 D xiii., L 1 L 2, L 3 Obturator L2, 3; LI, 2, 3 L 2, L 3, L 4 D xiii., L 1, L 2 L 1, L 2, L 3 Superior gluteal ... Liv., Si L-S.C, S1 L iii., L iv., S 1 L-S.C, S1 Inferior gluteal ... Great sciatic L iv., S 1, S 2 L-S.C, S1, S 2 Small sciatic. Not recorded. Sup. gluteal. L-S.C, S1, S 2 S 2 Small sciatic Not recorded. L iii., L iv., S 1 Not recorded. Pudendal S 2 Not recorded. S 2 N. Obturator Int Tibial nerve. SI, S2 Not recorded. S 2 N. Pyriformis Peroneal nerve. S 2 S 2 S 2 N. Quadratus Pern. Tibial nerve. S 1, S 2 Not recorded. Great sciatic. N. to Gemelli SI, S2 Not recorded. S 2 It is evident that Dxiii. and LI correspond to L 1 and L 2 of Man. It is also evident that the branches of the plexus are liable to considerable variation in different animals, and I found some differences on both sides in my own. For example, the obturator nerve came from L2 and L3 on the right side, but from L 1, L 2, L 3 on the left. The ilio-hypo gastric nerve (I-FL.N) is the continuation of Dxiii., and it is distributed as in Man. The ilio-inguinal (I-I.N) and genito-crural (G-C.N) nerves are also as in Man ; the former is large. The anterior crural nerve (A.C.N) divides into anterior and posterior divisions in the upper part of Scarpa’s triangle. The former gives off a cutaneous patellar branch, the cutaneous saphenous nerve and muscular branches to the sartorius, gracilis, and pectineus. The posterior division supplies the quadriceps extensor and the hamstring muscles *. The obturator nerve (O.N) divides into inner and outer parts between the inner and outer heads of the adductor brevis. The former emerges to the outer side of the superficial head of the muscle and supplies the pectineus, gracilis, adductor longus, and adductor brevis. The latter emerges to the inner side of the superficial head and supplies the adductor magnus, adductor brevis, and obturator externus. No branch accompanies the popliteal artery. The lateral cutaneous nerve (E.C.N) branches off from the anterior crural nerve, and is distributed as in Man. The great sciatic nerve (G.S.N) at first supplies the obturator * This distribution to the hamstrings was not observed in another Chimpanzee. [89]](https://iiif.wellcomecollection.org/image/b2982123x_0001_0091.jp2/full/800%2C/0/default.jpg)
