Cranium Flashcards
Viscerocranium
Mandible, Maxilla, Zygomatic, Nasal, Ethmoid (except cribiform plate), Lacrimal, Pterygoid process of Sphenoid (lateral and Medial plates), Tympanic part of Temporal including styloid process, Palatine, Vomer, Inferior Nasal Concha
Neurocranium
Frontal, Temporal (petrous, mastoid, and squamous), Occipital, Parietal, Sphenoid, Cribiform plate of Ethmoid
Calvaria
Inner and outer tables with cancellous diploe in the middle=marrow rich (primary source of red blood cells)
- Frontal, Parietal, occipital, Temporal (squamous)
- Neurocranial injuries=intracranial hemorrhage
Ethmoid
Middle Nasal Concha Orbital Plate (paper like=lamina papyracea) Crista Galli Perpendicular Plate (nasal septum) Ethmoid Air Cells Cribiform Plate
Sphenoid
Lesser and Greater Wings Superior Orbital Fissure Pterygoid Process:medial lateral plates Pterygoid canal Foramen Rotundum Foramen Spinosum Foramen Ovale Optic Canal Sella Turcica (hypophyseal fossa-pituitary gland)
Temporal
Squamous Part Petrous part Tympanic Part Mastoid Part Styloid Process Internal and External Acoutstic Meatus Zygomatic Process Mandibular Fossa/articular tubercle Stylomastoid foramen Jugular Fossa Carotid Canal Apparatus of Inner Ear (malleus, Incus, Stapes) Auditory Tube Petrous Ridge
Mandible
Head Neck mandible Ramus Mandibular Foramen (inner) Mylohyoid groove Coronoid Process Mental Protuberance Mental Foramen Mandibular Angle Alveolus
Temporomandibular Joint
Only moving joint of skull
*Head of mandible rides articular tubercle, not against mandibular fossa
Bones of Orbit
Frontal, Maxilla, Zygomatic, Spenoid, Ethmoid, Palatine, Lacrimal
Bones of Nasal Cavity
Maxilla, Ethmoid, lacrimal, nasal, vomer, palatine bones, sphenoid (medial pterygoid plates), Inferior nasal Concha
Paranasal Sinuses
Frontal, Maxillary, Sphenoidal, ethmoid air cells
Sagital Suture
Along sagital plane between paired parietal bones
Coronal Suture
Along coronal plane between frontal and parietal
Lamboidal Suture
Between occipital and parietal
Metopic (frontal) Suture
Fully fused along sagital plane of frontal bone
Squamosal suture
Suture between squamous and parietal bone
Occipitomastoidal suture
Suture between occipital and petrous part of temporal
Sphenoparietal Suture
Short suture between sphenoid and parietal bones
Extranumerary Bones
Incan/Wormian-near occipital protuberance…broken fused evolutionary bones
Le Fort Fracture I
Low, maxilla alveola-horizontal
Le Fort Fracture II
low, mid maxilla involving inferior orbital -pyramidal
Le Fort Fracture III
involve zygomatic arch, transverse
Positional Plagiocephaly
“oblique head” “flat head syndrome”
-due to repetitive head positioning during early growth…oblique slant to the sagital axis