Meninges

Question 1

Etymology of Pia

Answer 1

Soft

Question 2

Etymology of mater

Answer 2

Mother

Question 3

Leptomeninges=

Answer 3

Arachnoid and pia mater

Question 4

Vascularity of arachnoid

Answer 4

Relatively non-vascular

Question 5

=Division of dura mater sensory supply

Answer 5

Supra and infratentorial

Question 6

Nerve supply of supratentorial dura mater

Answer 6

The ophthalmic branch of V- anterior CN fossa

Maxillary branch of V- middle CN fossa

Question 7

Nerve supply of infratentorial dura mater

Answer 7

Vagus nerve

C1, 2 and 3

Question 8

Two layers of dura

Answer 8

External periosteal layer

Inner meningeal layer

Question 9

Extent of external periosteal dura

Answer 9

Adheres to the periosteum of the calvaria within the cranial cavity

Does not extend beyond FM (thus spinal dura only has one layer)

Question 10

Extent of inner meningeal layer of dura

Answer 10

Extends beyond FM and forms the spinal dura which terminates at S2

Question 11

Arachnoid consituents

Answer 11

Contains tight junctions

Fibroblasts, collage, fibres and some elastic fibres

Question 12

Pia consituents

Answer 12

Directly linesm the cerebrum and its fissures, lacks tight junctions

Composed of two layers:

Intimal layer

Epipial layer

Question 13

Intimal layer of pia

Answer 13

Avascular

Receives nutrients from CSF and neural tissues

Question 14

Epipial layer

Answer 14

Continuous with arachnoid trabeculae, absent over the convexities

Covered by simple squamous epithelium

Question 15

Dentate ligament

Answer 15

Formed by pia

Stretches from midpoint between dorsal and ventral roots on the lateral SC surface to attach to the arachnoid and dura

Question 16

Filum terminale

Answer 16

Extension of epipia which condenses and continues from S2, ending as the coccygeal ligament

Question 17

Virchow-Robin Spaces

Answer 17

Perivascular potential space between blood vessles and the surrounding sheath of leptomeninges entering the nervous tissue (brain and SC)

Question 18

Cisterns

Answer 18

Regions where the pia and arachnoid are widely separated

Can be intracranial

Lumbar (contains CE, largest at L2)

Question 19

Ectoderm gives

Answer 19

Leptomeninges

Ependyma

Neural parenchyma

Glia

Question 20

Mesoderm gives rise to

Answer 20

Dura

BVs

Question 21

Blood supply:

Supratentorial dura- anterior fossa

Answer 21

Anterior meningeal artery (ophthalmic artery)

Question 22

Blood supply:

Supratenotrial dura- middle fossa

Answer 22

MMA (maxillary)

Question 23

Blood supply:

Posterior fossa dura

Answer 23

Posterior meninegal artery (occipital and vertebral arteries)

Question 24

Innervation:

Anterior fossa

Answer 24

V1

Question 25

Innervation Middle fossa dura

Answer 25

V2

Question 26

Nerve supply Posterior fossa Mastoid air cells

Answer 26

V3 C2,3 X

Question 27

Blood supply to the tentorium

Answer 27

Cavernous ICA SCA Proximal PCA

Question 28

Meningo-orbital band- Neuroanatomy key references Picture of neurosurgical atlas