Dural reflections

Question 1

What forms the 4 dural reflections?

Answer 1

The meningeal layer of dura mater folds inwards upon itself to form four dural reflections

Question 2

Functions of these dural reflections?

Answer 2

These reflections project into the cranial cavity, dividing it into several compartments – each of which houses a subdivision of the brain

Question 3

Name them

Answer 3

Question 4

What type of reflection is the falx cerebri

Answer 4

Vertical midlines dural reflection

Question 5

The Falx Cerebri extends from

Answer 5

the cranial roof into the longitudinal fissure between the cerebral hemispheres

Question 6

The falx cerebri separates the

Answer 6

cerebral hemisphere

Question 7

Borders of the falx cerebri

Answer 7

Attached - adheres to the inner surface of the skull

Free - above the corpus callosum

Question 8

Attachments of the falx cerebri

Answer 8

Anterior - attach to the bony ridge of the
crista galli

Posterior - internal occipital protuberance and becomes continuous with the tentorium cerebelli

Question 9

What does the falx cerebri house?

Answer 9

superior sagittal and inferior sagittal sinuses

Question 10

Tentorium cerebelli extends from

Answer 10

the occipitotemporal region of the skull to lie in the transverse cerebral fissure between the posterior part of the cerebral hemispheres and cerebellum

Question 11

What separates the cerebrum from the cerebellum?

Answer 11

Tentorium cerebelli

Question 12

The tentorium cerebelli divides the intracranial space into

Answer 12

supratentorial and infra- tentorial compartments that contain the forebrain and hindbrain, respectively

Question 13

The tentorium cerebelli has a free border, give more info…

Answer 13

(aka tentorial notch)
that encircles the midbrain, as the brainstem communicates between the posterior and middle cranial fossae

Question 14

The tentorium cerebelli becomes continuous with the

Answer 14

falx cerebri in the midline

Question 15

The tentorium cerebelli contains the

Answer 15

transverse, straight and superior petrosal sinuses

Question 16

The diaphragma sellae covers what structure?

Answer 16

Covers the hypophyseal fossa
of the sphenoid bone

Question 17

The diaphragma sellae contains a small opening for the passage of what structure?

Answer 17

the stalk of the pituitary gland

Question 18

The diaphragma sellae houses which sinuses?

Answer 18

the anterior and posterior intercavernous sinuses

Question 19

The falx cerebelli projects from

Answer 19

the midline of the occipital bone

Question 20

The falx cerebelli separates

Answer 20

the right and left cerebellar hemispheres

Question 22

The falx cerebelli houses

Answer 22

The occipital sinus