Lecture 2: cranium pt.1
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104 Terms
2 parts of the cranium
Neurocranium and splanchnocranium
Neurocranium
Bones and tissues surrounding the brain
Splanchnocranium
Facial bones
6 Neurocranium bones
Frontal, parietal, occipital, temporal, sphenoid, ethmoid
2 divisions of Neurocranium bones
Calvaria (roof of skull), basicradium (floor of skull)
3 bones of calvaria
Frontal, parietal, occipital
3 bones of basicranium
Temporal, sphenoid, part of ethmoid
7 articulations of frontal bone
Nasals, maxillae, lacrimals, ethmoid, sphenoid, zygomatics, parietals
2 parts of frontal bone
Frontal squamous and horizontal portion
Difference between supraorbital notch and supraorbital foramen
Notch is not close (U-shaped), foramen is closed
Supraorbital margin
Brow ridge
Frontal bosses
Puffy/rounded area in middle of forehead
What is 1
Supraorbital notch/foramen
What is 2
Supraorbital margin
What is 3
Temporal line
What is 4
Zygomatic process
What is 5
Frontal bosses
Sagittal sulcus
Small depression
Arachnoid fovea
Cluster of holes
Meningeal grooves
Look like veins
Foramen caecum
most anterior aspect of crest
What is 6
Frontal crest
What is 7
Sagittal sulcus
What is 8
Arachnoid fovea
What is 9
Meningeal grooves
What is 10
Foramen caecum
4 differences between frontal and parietal bone
Parietal have more pronounced meningeal grooves, smoother surface, less curved, thinner
5 articulations of parietal bones
Occipital, frontal, sphenoid, temporal, and other parietal
4 sides of parietal bone
Medial, frontal, inferior, posterior
Which side is frontal in parietal bone and what bone does it connect with
Straight side, connects with frontal bone
Which side is medial in parietal bone and what bone does it connect with
Long c-shaped side, connects with other parietal
Which side is posterior in parietal bone and what bone does it connect with
Short side with notch at bottom, connects with occipital
Which side is inferior in parietal bone and what bone does it connect with
Sharp c-shaped, connects with temporal
Is parietal foramen always beside sagittal suture
No, can sometimes be on it
What is 1
Parietal bosses
What is 2
Temporal line
What is 3
Parietal foramen
What is 4
Arachnoid fovea
What is 5
Sagittal sulcus
What is 6
Meningeal grooves
What is 7
Sigmoid sulcus
3 ways to tell apart parietal bone from temporal, occipital, and frontal bones
Parietal is more uniformly thick, had temporal line across entire ectocranial length, endocranial surface is smoother
4 occipital articulations
Parietal, temporal, sphenoid, atlas C1
What is orange
Occipital bone
What is yellow
Sphenoid
What is red
Temporal
What is green
Parietal
3 parts of occipital bone
Squamous, basilar, lateral
What is yellow
Basilar
What is purple
Lateral
What is blue
Squamous
Hypoglossal canal
Goes under occipital condyles
What is 1
Nuchal lines
What is 2
External occipital crest
What is 3
External occipital protuberance
What is 4
Condylar fossa
What is 5
Occipital condyles
What is 6
Foramen magnum
Hypoglossal canals
What is 8
Occipital (sagittal) sulcus
What is 9
Internal occipital protuberance
What is 10
Transverse sulci
What is 11
Jugular notch
What does the jugular notch form
Jugular foramen with temporal
4 ways to tell apart occipital bone from other bones
Wide variation in thickness across squama, no endocranial meningeal grooves, more rugose, no feathering
5 temporal articulations
Parietal, occipital, sphenoid, zygomatic, and mandible
3 temporal parts
Squama, tympanic, petrous pyramid
What is 2
Mandibular/glenoid fossa
What is 5
Stylomastoid foramen
What is 1
Mastoid process
What is 3
Zygomatic process
What is 4
Styloid process
What is 6
External auditory meatus
What is 7
Jugular fossa
What is 8
Carotid canal
What is 9
Internal acoustic meatus
What is 10
Sigmoid sulcus
2 ways to tell apart temporal bone from other bones
Thinner, zygomatic bone is not as thin or long as zygomatic process of temporal bone
8 sutures
Sagittal
Frontonasal
Zygomaticomaxillary
Metopic (usually absent)
Coronal
Lambdoidal
Squamosal
Spheno-occipital
What is pink
Lamboid
What is black
Squamous
What is red
Coronal
What is yellow
Sagittal
What is green
Lamboid
What is brown
Frontonasal
What is blue
Zygomaticomaxillary
What is 8
Spheno-occipital
What is 4
Metopic
3 parts of hyoid bone
Body, greater horns, lesser horns
1 articulation of mandible
Temporal @ glenoid process
2 parts of mandible
Body/horizontal ramus and ascending ramus
What is 1
Mental foramen
What is 2
Mental eminence/protuberance
What is 3
Mandibular condyle
What is 4
Mandibular notch
What is 5
Coronoid process
What is 6
Gonial angle
What is 7
Mylohyoid line
What is 8
Mental spines
What is 9
Mylohyoid groove
Note 
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