1b. Skull HAL - Worksheet & Radiology Flashcards
what is the skull a term used to denote
denotes the cranium
what is the cranium made uo of
facial bones and bones of cranial cavity and mandible
is the frontal bone paired
why/why not
no
paired in fetus due to metopic suture but fused in adult
is the temporal bone paired
paired
is the occipital bone paired
no
is the sphenoid bone paired
no
is the ethmoid bone paired
no
is the maxilla bone paired
why/why not
due to maxillary suture
is the parietal bone paired
why/why not
paired
due to sagittal suture
is the palatine bone paired
paired
is the zygoma bone paired
paired
is the nasal bone paired
why/why not
paired
due to suture
is the lacrimal bone paired
paired
is the vomer bone paired
unpaired
is the inferior nasal concha bone paired
paired
what 7 bones are definitely seen in the anterior view of the skull
what 3 are partially seen in the anterior view
frontal sphenoid nasal vomer maxilla zygoma mandible
a little: lacrimal, temporal, parietal
what 9 bones are definitely seen in the lateral view of the skull
which bone is partially seen in the lateral view
temporal occipital frontal zygomatic nasal maxilla lacrimal mandible sphenoid greater wing
little bit of ethmoid in the orbit
what 5 bones are definitely seen in the posterior view of the skull
occipital parietal temporal maxilla mandible
what 7 bones are definitely seen in the inferior view of the skull
occipital temporal sphenoid vomer palatine maxilla zygoma
what bones does the coronal suture divide
frontal from both the parietals
what bones does the sagittal suture divide
both the parietals
what bones does the lamboid suture divide
occipital from both parietals
what bones does the squamous suture divide
temporal from parietal on each side
is there a suture line between the sphenoid and frontal bones
no
where is the glabella located on the head
most anterior midline point on the frontal bone
above frontonasal suture
where is the nasion located on the head
midline point where the 2 nasal bones and the frontal bone intersect
where is the acanthion located on the head
tip of the anterior nasal spine
where is the external occipital protuberance located on the head
what is it also known as
on the occipital bone
aka: inion
where is the vertex located on the head
most superior point of cranium
little bit posterior to bregma
what is the bregma
where coronal and sagittal sutures meet
where is the foramen magnum located on the head
what structures are either side of the foramen magnum and what do they do
on occipital bone
condyles articulate with the C1 vertebrae/atlas
where is the external auditory meatus located on the head
temporal bone
where is the mastoid process located on the head
what does it serves as
temporal bone
attaches muscles of neck
where is the styloid process located on the head
temporal bone
where is the zygomatic arch located on the head
formed by zygomatic and temporal bones
where is the lateral canthus of eye located on the head
on the skull slightly medially to the most lateral part of the orbital margin (ectochonion)
outer corner of eye
where is the nasal septum located on the head
inside nasal cavity
where is the condyle of mandible located on the head
what joint does it form
mandible bone
forms temporomandibular joint with temporal bone
where is the angle of mandible located on the head
what is it also known as
on mandible (angled part on the side of the jaw)
gonion
where is the mental protuberance located on the head
mandible
point of chin anteriorly
what are the 3 portions of the interior aspect of the cranium
anterior/middle/posterior cranial fossa
what 3 bones make up the anterior fossa
frontal
ethmoid
sphenoid lesser wing
what 2 bones make up the middle fossa
sphenoid (except lesser wing)
temporal bone
what 2 bones make up the posterior fossa
temporal (posterior part of petrous pyramid)
occipital bone
were is the crista galli located in terms of the bone its part of and which cranial fossa it resides in
ethmoid
anterior fossa
were is the lesser wing of sphenoid located in terms of the bone its part of and which cranial fossa it resides in
sphenoid
anterior fossa
were is the greater wing of sphenoid located in terms of the bone its part of and which cranial fossa it resides in
sphenoid
middle fossa
were is the sella turcica located in terms of the bone its part of and which cranial fossa it resides in
what else is it known as
sphenoid
middle fossa
aka: pituitary/hypothalamus fossa
were is the anterior and posterior clinoid process located in terms of the bone its part of and which cranial fossa it resides in
sphenoid
middle fossa
were is the dorsum sellae located in terms of the bone its part of and which cranial fossa it resides in
sphenoid
middle fossa but arguable in posterior fossa too
were is the petrous pyramid located in terms of the bone its part of and which cranial fossa it resides in
temporal bone
both middle and posterior fossa as the petrous ridge denotes the boundary
were is the petrous ridge located in terms of the bone its part of and which cranial fossa it resides in
temporal bone petrous pyramid
boundary of middle and posterior fossa
what does the petrous pyramid house
in terms of ear and nerves/vessels
middle and internal ears
conduit for internal carotid artery and cranial nerves 7&8
were is the internal acoustic meatus located in terms of the bone its part of and which cranial fossa it resides in
temporal bone petrous pyramid
posterior fossa
were is the clivus located in terms of the bone its part of and which cranial fossa it resides in
occipital bone (base)
posterior fossa
what are the 4 paranasal sinuses
frontal
maxillary
ethmoid
sphenoid
what are the ethmoid sinuses divided into
anterior, middle and posterior ethmoid air cells
what divides the sphenoid sinus into the pair
septum
what does the optic canal transmit
cranial nerve 2
opthalmic artery
what does the superior orbital fissure transmit
structures passing to/from orbit and face surrounding the orbit
cranial nerves 3-6 (occulomotor, trochlear, trigeminal and abducens)
what does the interior orbital fissure transmit
structures passing to/from the orbit and the face surrounding the orbit including branches of the cranial nerve 5 - trigeminal
what does the foramen rotundum transmit
maxillary division of cranial nerve 5 - trigeminal
what does the foramen ovale transmit
mandibular division of cranial nerve 5 - trigeminal
what does the foramen spinosum transmit
middle meningeal artery
what does the foramen lacerum transmit
internal carotid artery into cranial cavity through its inner half
what does the jugular foramen transmit
cranial nerves 9-11 (glossopharyngeal, vagus and accessory)
internal jugular vein
what does the carotid canal transmit
what does it continue into
internal carotid artery
continues into the foramen lacerum
what is the relation between the position of the foramen lacerum and carotid canal
F. lacerum passes obliquely through carotid canal
which bone/cranial fossa is the optic canal located in
border of anterior/middle fossa
middle of sphenoid bone
which bone/cranial fossa is the superior orbital fissure located in
middle fossa
lower edge of greater wing of sphenoid
which bone/cranial fossa is the internal orbital fissure located in
in orbits
which bone/cranial fossa is the foramen rotundum located in
middle fossa
where the sphenoid greater wing and middle body join
which bone/cranial fossa is the foramen ovale located in
middle fossa
lower point of greater wing of sphenoid
which bone/cranial fossa is the foramen lacerum located in
border of middle/posterior fossa
lower edge of where sphenoid greater wing and body join
which bone/cranial fossa is the foramen spinosum located in
middle fossa
lower point of greater wing of sphenoid
lower than foramen ovale
which bone/cranial fossa is the jugular foramen located in
posterior fossa
middle of edge between petrous ridge of temporal bone and occipital bone
which bone/cranial fossa is the carotid canal located in
border of middle/posterior fossa
lower edge of where sphenoid greater wing and body join
(same as foramen lacerum)
