Flashcards in Osteology, Radiology and Common Disorders Deck (26):
Name the 2 sections of the skull.
How many bones are there in the skull?
How many bones are there in the neurocranium?
How many bones are there in the viscerocranium?
Name the bones of the neurocranium.
REMEMBER: PEST OF 8
P: Parietal bone (L&R)
E: Ethmoid bone
S: Sphenoid bone
T: Temporal bone (L&R)
O: Occipital bone
F: Frontal bone
Name the bones of the viscerocranium.
Vicky Can Not Make My Pet Zebra Laugh.
C: Conchae (inferior) (L&R)
N: Nasal bones (L&R)
M: Maxilla (L&R)
P: Palatine bone (L&R)
Z: Zygomatic bone (L&R)
L: Lacrimal bones (L&R)
Name the one only free movable joint in the skull.
The temporomandibular joint (TMJ)
What is the medical name given to immobile joints in the skull?
Name the suture between the frontal and parietal bone.
Name the suture between the parietal bone and the temporal bone.
Name the suture between the parietal bone and the occipital bone?
Name the suture between the two parietal bones.
What name is given to the point where the saggital suture and coronal suture meet?
What name is given to the point where the saggital suture and lambdoid suture meet?
What name is given to the point where the frontal, parietal, temporal, and sphenoid join together.
What name is given to an anatomical feature of an infant human skull comprising of soft membranous gaps (sutures) between the cranial bone.
At what time period do infant fontanelles close?
Within the first 2 years of life.
What are the functions of fontanelles?
- Flexibility eases passage through birth control
- Allow for brain growth
What is the clinical significance of the pterion?
It can be easily fractured severing the middle meningeal artery underneath. This leads to epidural heamoridge.
Name the four major types of cranial fracture.
3. Basal Skull
Describe what is meant by a depressed skull fracture.
A fracture of the bone with depression of the bone inwards. They occur as a result of a direct blow, causing skull indentation, with possible underlying brain injury.
Describe what is meant by a linear skull fracture.
The simple break in the bone, traversing its full thickness. They have radiating (stellate) fracture lines away from the point of impact. The most common type of cranial fracture.
Describe what is meant by a basal (basilar) skull fracture.
Affects the base of the skull. They characteristically present with bruising behind the ears, known as Battle’s sign (mastoid ecchymosis) or bruising around the eyes/orbits, known as Raccoon eye’s.
Describe what is meant by a diastatic skull fracture.
A fracture that occurs along a suture line, causing a widening of the suture. They are most often seen in children.
A patient presents with rhinorrhoea, raccoon eyes, mastoid bruising (battle's sign) and blood in the ear drums following a RTC.
What type of skull fracture are there signs consistent with?
Basilar skull fracture