Of the infraorbital bones, the lachrymal is preserved.
The animal was mounted in a stereotaxic frame and its head positioned with a bite bar, eyehooks set into the infraorbital foramen, and ear bars coated in lidocaine hydrochloride gel.
The masseter medialis (a jaw muscle) passes partially through the infraorbital foramen and connects to the bone on the opposite side.
This, together with their lack of an infraorbital plate and the relative size of the infraorbital foramen, distinguishes hystricognaths from other rodent groups.
It traverses the infraorbital groove and canal in the floor of the orbit, and appears upon the face at the infraorbital foramen.
Above the fossa, the infraorbital canal ends in the infraorbital foramen an opening that transmits the infraorbital vessels and nerve.
The skull consists of small orbits with long nasal bones and the infraorbital foramen is very large.
It passes through the ring of the stapes and divides into supraorbital, infraorbital, and mandibular branches which follow the three divisions of the trigeminal nerve.
