Cranial Cavity & Meninges / Blood supply

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Bones of the Cranium
- Parietal (x2)
- Temporal (x2)
- Frontal
- Ethmoid
- Sphenoid
- Occipital
Layers of the calvaria
- Inner = compact bone
- Middle = spongy bone
- Outer = compact bone
Cranial sutures are _____ joints

Fibrous
Where is the lamdoid suture?

B/w occipital & parietal bones
Where is the squamous suture?

B/w temporal & parietal bones
Which fontanelle is the last to fuse?

Anterior (largest; closes @ 1.5 yrs)
Clinical importance of the Pterion

overlies anterior division of middle meningeal a.
Bones of anterior fossa
- Frontal
- Ethmoid
- Sphenoid
Separates anterior/middle fossae

Sphenoidal ridge
Separates middle/posterior fossae

Superior petrosal ridge
Bone overlying the nasal cavity

Ethmoid
Attaches to the crista galli?

Falx cerebri
Which foramen transmits the emissary vein b/w superior sagittal sinus and the nasal cavity?

Foramen Cecum
Bones of the middle cranial fossa
- Sphenoid
- Temporal
- Parietal
Bones that articulate with the sphenoid bone?
- Temporal (x2)
- Parietal (x2)
- Palatine (x2)
- Zygomatic (x2)
- Frontal
- Ethmoid
- Occipital
- Vomer
T/F: Sphenoid bone articulates with all the bones of the cranial cavity

True
T/F: Internal carotid a. traverses thru the foramen lacerum

False: Crosses over the top part of foramen lacerum
Thru what bone do the greater & lesser petrosal nn. traverse?

Petrous portion of the temporal bone
Hiatus of the greater petrosal n. is also known as _____

Facial canal
Bones of the posterior cranial fossa
- Sphenoid
- Occipital
- Temporal
- Parietal
Which bone is found in all 3 cranial fossae

Sphenoid bone
Major foramina of the posterior cranial fossa
- Foramen magnum
- Hypoglossal canal
- Internal acoustic meatus
- Jugular foramen
What forms the jugular foramen
- Occipital bone
- Petrous part of temporal bone
What veins bound the nerves as they traverse thru the jugular foramen?
- Anterior = Inferior petrosal sinus
- Posterior = Sigmoid sinus
T/F: The foramen rotundum can be seen in both the cranial floor and the base of the skull

False: Not seen in the base of the skull as it communicates w/ the pterygopalatine fossa
Four partitions formed by inner layer of dura
- Falx cerebri
- Falx cerebelli
- Tentorium cerebelli
- Diaphrgma sellae
Attachments of the Falx Cerebri
- A) Crista Galli of Ethmoid
- P) Tentorium cerebelli
What structure contains the occipital sinus?

Posterior border of falx cerebelli
Attachments of the tentorium cerebelli
- Ant. / Post. clinoid processes of the sphenoid
- Along sulcus for transverse sinus (posterolaterally)
Infundibular stalk of the hypothalamus passes thru what structure?

Diaphragma Sellae
T/F: Arachnoid mater is vascularized?

False
CSF is found in which meningeal space?

Subarachnoid
Where are the arachnoid granulations primarily found?

Protruding into dura w/in the sup. sagittal sinus & transverse sinuses
Three groups of veins related to the cranial cavity
- Emissary veins
- Diploic veins
- Dural sinuses
Function of the Emissary veins

Pass thru foramina of skull to form anastamoses b/w veins external to skull and the dural sinuses
T/F: Emissary veins do not contains valves

True! Blood can flow in either direction
KREUGER 14

card 14

Author

mnm2186

39974

Card Set

Cranial Cavity & Meninges / Blood supply

Description

Exam 4

Updated

2010-10-08T12:35:11Z

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