TABLE 1. Per limb muscle proportions for quadrupedal and bipedal models. BM - Body Mass, PCA - Physiological Cross-section Area, FL - Fibre Length, TL - Tendon Length, FD - Flexor Digitorum, ED - Extensor Digitorum. FL and TL are the same in both quadrupedal and bipedal models.

Quadruped Biped   % BM (kg) PCA (m2) FL (m) TL (m) % BM (kg) PCA (m2) Hindlimb Deep Dorsal Group 2.33% 0.152 0.104 0.082 3.33% 0.217 Triceps Femoris Group 1.75% 0.018 0.664 0.201 2.50% 0.026 Caudo Femoralis Group 3.50% 0.063 0.375 0.496 5.00% 0.090 Femoro Tibialis Group 1.75% 0.076 0.157 0.470 2.50% 0.108 Flexor Cruris Group 2.33% 0.030 0.521 0.289 3.33% 0.043 Gastrocnemius Lateralis + FD 1.75% 0.055 0.215 0.623 2.50% 0.079 Tibialis Anterior + ED 2.33% 0.191 0.083 0.369 3.33% 0.272 Gastrocnemius Medialis 1.75% 0.252 0.047 0.649 2.50% 0.359 Forelimb Shoulder Flexors 1.00% 0.027 0.246 0.267 0% 0 Triceps Brachii 0.75% 0.030 0.171 0.239 0% 0 Shoulder Extensors 1.50% 0.162 0.063 0.485 0% 0 Biceps Brachii 0.50% 0.021 0.160 0.302 0% 0 Elbow Flexors 0.50% 0.035 0.098 0.016 0% 0 Elbow Extensors 0.75% 0.108 0.047 0.138 0% 0 Wrist Flexors 1.00% 0.252 0.027 0.298 0% 0 Wrist Extensors 1.50% 0.323 0.031 0.353 0% 0