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Fig. 1. Schematics of models and loading conditions used in this study. (A–E)
Schematics of hypothetical goat skulls in parasagittal section. (A) Unvaulted
frontal (UF); (B) vaulted cortical bone-filled frontal (SFC); (C) vaulted
trabecular bone-filled frontal (SFT); (D) vaulted frontal with unstrutted
sinus (US); (E) vaulted frontal with strutted sinus (SS). The endocranial
cavity (ec) and sinuses (fs) are indicated in black and trabecular bone is
indicated in gray, along with the external cortex (ecx) and internal cortex
(icx) of the frontal bone. Schematics of finite element models in (F) dorsal
and (G) left lateral views, with arrows indicating the location and direction
of modeled loads for various loading cases. DHL, double horn loading case; FL,
frontal loading case; SHF, single horn front loading case; SHL, single horn
lateral loading case; SHT, single horn tip loading case.