Skull Flashcards
What two bones form the dorsal cranium?
Frontal and parietal
What is the median ridge on the dorsal skill formed by parietal and interparietal bones?
External Sagittarius crest
The ____________ lines extend fro the external occipital protuberance to the zygomatic process of the frontal bone
Temporal
What marks the edge between the dorsal and caudal surfaces of the skill?
Nuchal crest
The caudal end of the external sagittal crest is the ?
External occipital protuberance
What convex surface lies cranially to the nuchal crest, and causally to the zygomatic process of the temporal bone?
Temporal fossa
What are the three parts of the temporal bone?
Squamous, tympanic, and petrous
The _____________ part of the temporal bone contains part of the temporal fossa and the zygomatic process
Squamous
The ventrolateral surface of the skull, cranial to the temporal bone, is formed by what two bones?
Basisphenoid and presphenoid
What bone bears three upper incisor teeth?
Incisive bone
What is bound ventrolaterally by the incisive bone and dorsally by the nasal bone?
Nasal pasture
Cavity where the eye is situated?
Orbit
What forms the orbital medial margin?
Frontal, lacrimal, zygomatic
What forms the lateral orbital margin?
Orbital ligament
Frontal process of zygomatic to the zygomatic
What fossa is located ventral to the orbit and serves as the attachement site for a muscle of mastication?
Pteygopalatine fossa
What are the three openings in the caudal orbit?
Optic canal, orbital fissure, rostral alar canal
The orbital fissure is formed by the articulation of what two bones?
Presphenoid
Basisphenoid
In the rostral part of the pterygopalatine fossa, what two foramina are located, dorsal to ventral?
Caudal palatine foramen
Sphenopalatine foramen
What are the caudal and rostral openings of the infraorbital canal?
Caudal- maxillary foramen (cranial orbit)
Rostral- infraorbital foramen (maxillary bone)
What bone forms the caudal third of the ventral cranium?
Basiocciptial
What part of the skull articulates with he atlas?
Occipital condyle
What re the ventral projections of the occult it also bones that articulates with the tympanic bulla?
Paracondylar process
What is the enlargement of the tymporal bone which encloses the middle ear cavity and its ossicles?
Tympanic bulla
What is the opening on the lateral side of the tympanic bulla?
External acoustic meatus
What cartilage attaches the auricle to the external acoustic meatus?
Annular cartilage
What cartilage redirects the force of the muscles controlling the ear?
Scutiform cartilage
What part of the temporal bone contains the membranous and bony labyrinth of the inner ear?
Petrosal part
What contains the cochlear window and lies under the tympanic bulla?
Promontory
What is the only process of the petrous part of the temporal bone that can be viewed externally and serves as attachment for cleidocephalicus, sternochephalicus, and splenious muscles
Mastoid process
