Comparative Triceps Surae Morphology in Primates: A Review

Figure 1

Illustrations of the superficial leg musculature of various primate species. Note that plantaris is larger than in the typical human condition in most images (e.g., Galago, Otolemur, Tarsius, Macaca, and Rhinopithecus). Species in which plantaris is similar in size to the human condition are Gorilla, Pan, and Alouatta. Image adapted from: (1) 95-Otolemur (published as Galago crassicaudatus), (2) 94-Tarsius, (3) 96-Macaca niger (published as Cynopithecus niger) and Rhinopithecus, (4) 80-Macaca mulatta, (5) 81-Alouatta, (6) 98-Galago, (7) 175-Gorilla, (8) 99-Nycticebus and (9) 97-Homo, Pan, and Papio. “G” indicates gastrocnemius, “S” indicates soleus, and “P” indicates plantaris.