Flashcards in Lecture 26 DA Deck (82)
How many bones can be found in the skull?
What are the joints in the skull like?
They are immobile and called sutures.
What is the base of the cranium called?
What bone covers the parietal lobe, and how many are there?
The parietal bone. There are two.
What bone covers the frontal lobe, and how many are there?
The frontal bone. There are two.
What bone covers the occipital lobe, and how many are there?
Occipital bone. There is one.
What bone covers the temporal lobe, and how many are there?
The temporal bone. There are two.
Where is the sphenoid bone, and what does it do? How many does the skull have?
One sphenoid bone under the frontal plate, and anterior to the temporal plate. Gives structure to the inside of the skull. There is only one.
Where is the ethmoid bone, and how many are there.
There is one ethmoid bone at the base of the frontal bone.
How many maxilla bones does the skull have and where is it?
There are two of them, and it is the upper jaw, up to but not including the cheekbone (zygomatic bone), and bilaterally to the top of the nose.
How many zygomatic bones does the skull have and where is it?
There are two of them, and they are the cheekbones, lateral to the maxilla.
Where is the mandible found?
Inferior to the maxilla, it is the lower jaw bone.
Name 5 small bones within the skull, and how many of them there are.
2 inferior conchae
They are found particularly within the nasal cavity.
What is the name of the suture connecting the two parietal bones?
What is the name of the suture connecting the parietal bone to the frontal bone?
Coronal, most anterior.
What is the name of the suture connecting the occipital bone to the parietal bone?
Lambdoidal, most posterior.
What is the telencephalon?
What is the Metencephalon?
Cerebellum and pons.
What is the myelencephalon?
What does the brain stem do, and is it protected by the skull?
It is responsible for unconscious acts and is protected by the skull.
What are the three fossae of the cranial floor?
Anterior, middle and posterior cranial fossa.
What covers the superior orbits?
The orbital plate of the frontal bone.
Where is the sphenois bone found in relation to the three cranial fossae?
It is found posterior to the anterior cranial fossa.
What does the sphenoid bone look like?
It looks like a winged insect and the superior edge of the wing is called the lesser wing of the sphenoid. Inferior edge is greater wing.
What is found between the two orbital plates?
The ethmoid bone.
What is the cribiform plate, and what passes through it?
It is part of the ethmoid bone and has little hones for nerves to pass through from the nasal cavity.
What seperates the anterior and middle cranial fossa?
The sphenoid bone.
What structure is the floor of the middle cranial fossa?
The temporal bone.
What is the petrous temporal bone and what does it house?
Inferiorly it is a fat portion of the temporal bone and houses the cochlea.