Skeletal System and Skull Landmarks

imissyou419's version from 2016-12-11 04:04

Section 1

Question Answer
Total number of bones206 (22 skull, 25 thoracic cage, 26 vertebral column)
Cranial vs facial bonescranial tends to be flat plates of armour, mainly for protection, facial tends to defines sensory organs (eyes, nose, ear, mouth)
What contribute to the floor of cranial cavity?sphenoid and ethmoid
Lambdoid suturebetween parietal and occipital bone
Squamous suturebetween temporal and parietal bone
Sagittal suturebetween parietal bones
Bregmabetween frontal and parietal bones, adult version of anterior fontanels
Coronal suturebetween frontal and parietal bones
Pterionbetween frontal, parietal, temporal, and sphenoid bones, site of middle meningeal artery
anterior fontanelsin newborn, site between frontal and parietal bone where it is membranous
posterior fontanelsin newborn, site between parietal and occipital bone where it is membraneous
superior nucheal line and inferior nuchal linesite of attachment of muscles (trapezius), joined at midline by external occipital crest
bone formation, what happens if frontal plates do not fuse together properly?frontal bone starts as 2 separate plates (from centres of ossification radiate out), if the frontal plates do not fuse together, get metopic suture
temporomandibular joint is formed bymandibular condyle of mandible bone inserting into mandibular fossa of temporal bone
Bones that contribute to the orbit of the eye? (7)frontal, zygomatic, maxillary, sphenoid, ethmoid, palatine, lacrimal
What are the fontaelles?anterior, posterior, mastoid, sphenoid, membrous structures
2 bones that contribute to formation of bony shelf/hard platemaxillary bone and palatine bone
Cleft lippalatine shelves do not come together properly at midline (can even be maxilla not formed properly)
Palatine process in ___ surface, contains ____medial, maxillary sinuses
temporal bone has 4 regionssquamous, tympanic, mastoid, petrous
Fractures of orbitorbital margins strong, medial and inferior walls weaker, injury fractures walls
anterior cranial fossa, middle cranial fossa, posterior cranial fossalike steps, lobes of brain reside in different cranial fossa
Petrous ridgePart of temporal bone, separates middle fossa from posterior fossa
Sphenoid ridgePart of sphenoid, separates anterior fossa from middle fossa
3 bones that contribute to anterior cranial fossaorbital plate of frontal bone, ethmoid bone, lesser wing of sphenoid

Section 2

Question Answer
V1 comes out wheresuperior orbital foreman (notch)
V2 comes out whereinferior orbital foreman
V3 comes out wheremental and mandibular formina
Olfactory nerve (CN I)foramina of cribiform plate
Optic nerve (CN II)optic foramen (canal)
Opthalmic arteryoptic foramen (canal)
Oculomotor nerve (CN III)superior orbital fissure
Trochlear nerve (CN IV)superior orbital fissure
V1superior orbital fissure
abducens nerve (CN VI)superior orbital fissure
V2foramen rotundum
V3foramen ovale
Middle meningeal arteryforamen spinosum
Internal carotid arteryforamen lacerum
Vestibulococchlear nerve (CN VIII)internal auditory meatus
Facial nerve (VII)internal auditory meatus
Jugular veinjugular foramen
Glossopharyngeal (CN IX)jugular foramen
Vagus (CN X)jugular foramen
Accessory (CN XI)jugular foramen
Hypoglossal nerve (CN XII)hypoglossal canal
medulla oblongata/spinal cordforamen magnum
facial nerve (VII)stylomastoid foramen

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