Lecture 23 Flashcards
Components of the skull
Neural (brain) and visceral (face)
Skull minus mandible
Cranium
Formed by union of maxillary bones and zygomatic bones
Viscerocranium
Formed by bones making the calvaria
Neurocranium
Skull cap
Calavaria
Bones in viscerocranium
Nasal (2), lacrimal (2), zygomatic (2), maxillae, inferior nasal conchae (2), palatine
Bones in neurocranium
frontal, parietal (2), ethmoid, sphenoid, temporal (2), occipital)
Landmark for dividing line of viscero/neurocranium
external acoustic (auditory) meatus
Components of calavaria
Outer table, dipole, inner table
Sutures of the skull
coronal, sagittal, lambdoidal, meteoric, squamosal, wormian bones
4 diploic veins
frontal veins, anterior temporal veins, posterior temporal veins, occipital veins
Veins that pierce the skill and connect the veins of the scalp with diploic veins and internal venous sinuses
Emissary veins
Veins that run with diploic (cancellous) bone
diploic veins
Function of diploic veins
drain neurocranium and scalp; drain into dural venous sinuses
Orbit foramina
Optic canal
Superior orbital fissure
Inferior orbital fissure
Infraorbital groove
Borders of orbit
Ms. Elfz
(maxillary, sphenoid, ethmoid, lacrimal, femoral, zygomatic)
(floor, apex, medial side, roof, lateral side)
anterior branch of middle meningeal artery passes
pterion
bleeding from middle meningeal artery
epidural hematoma
body of sphenoid contains:
hypophyseal fossa (sella turcia –> pituitary gland), tubercular sellae, dorsum sellae, posterior crinoid process
attachment for pterygoid muscles that move the mandible
medial and lateral pterygoid plates
slope of basilar part of occipital bone
clivus
occipital condyles articulate with
articular facets of C1
temporal bone - inner ear
petrous portion
3 cranial fossa
anterior cranial fossa, middle cranial fossa, posterior cranial fossa
contents of posterior cranial fossa
cerebellum and brainstem
contents of middle cranial fossa
temporal lobes of cerebral cortex
contents of anterior cranial fossa
frontal lobes of cerebral cortex
site for a dental block
mandibular foramen
scalp composition
Skin Connective tissue (dense) Aponeurotic layer Loose connective tissue Periosteum
borders of ant. cranial fossa
LOC (loss of consciousness)
lesser wing of scaphoid, orbital plates, cribriform plates + crista galli
borders of middle cranial fossa
GPS (when you’re in the MIDDLE of nowhere)
greater wing of scaphoid, parietal bone, squamous + petrous temporal bone
borders of post. cranial fossa
(Oh please, patrick!)
occipital bone, petrous part of temporal, parietal bone
