Dural Folds Flashcards by John Jonah Jameson Jr.

Q

What are the fossae of the skull?

A

Anterior Cranial Fossa
Middle Cranial Fossa
Posterior Cranial Fossa

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Q

Describe Cranial Dura

A

Opaque
Thick
Fibrous

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Q

Functions of Cranial Dura

A

Divides cranial cavity into compartments
Accommodates Dural Venous Sinuses

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Q

Cranial arachnoid and pia mater are …

A

transparent

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Q

Describe the Pia Mater

A

Thin delicate membrane
Follows contour of brain

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Q

The Cranial Dura Mater is formed from ____ which ____

A

__2 layers__
__adhere to each other__

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Q

Where do the layers of Dura Mater not adhere to each other?

A

Areas that enclose Venous Sinuses
Where Meningeal Layers form dural folds

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Q

What are the two layers of Cerebral Dura Mater called?

A

Outer Periosteal Layer
Inner Meningeal Layer

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Q

Characteristics of the Outer Periosteal Layer of Cerebral Dura Mater

A

Adheres to inner surface of skull bones

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Q

Describe the continuation of the Outer Periosteal Layer of Cerebral Dura Mater in the Spinal Cord

A

Continuous with periosteum lining Vertebral Canal

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Q

Function of Inner Meningeal Layer of Cerebral Dura Mater

A

Forms 4 septa dividing cranial cavity in compartments

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Q

Septa formed by Inner Meningeal Layer

A

Falx Cerebri
Tentorium Cerebelli
Falx Cerebelli
Diaphragma Sellae

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Q

Falx Cerebri
Shape

A

Crescentic fold between cerebral hemispheres

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Q

Falx Cerebri
Description

A

2 ends
2 borders
2 surfaces

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Q

Falx Cerebri
Anterior end attached to …

A

crista galli

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Q

Falx Cerebri
Posterior end is blended with the ____

A

tentorium cerebelli

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Q

Falx Cerebri
What is present at the posterior end of the Falx Cerebri?

A

Straight Sinus

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Q

Falx Cerebri
Describe the upper border

A

Convex

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Q

Falx Cerebri
Upper border is attached to …

A

internal surface of cranial vault

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Q

Falx Cerebri
The upper border contains the …

A

superior sagittal sinus

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Q

Falx Cerebri
Describe the lower border

A

Concave

Q

Falx Cerebri
The lower border contains the …

A

inferior sagittal sinus

Q

Tentorium Cerebelli
Shape

A

Tent shaped fold

Q

Tenotrium Cerebelli
Location

A

Forms roof over posterior cranial fossa

Q

Tentorium Cerebelli
Divides the cranial cavity into …

A

supratentorial and infratentorial compartments

Q

Tentorium Cerbelli
Description

A

2 margins
2 surfaces

Q

Tentorium Cerebelli
Margin Names

A

Inner (free) Margin
Outer (attached) Margin

Q

Tentorium Cerebelli
Describe the inner margin

A

Concave

Q

Tentorium Cerebelli
Inner margin bounds the …

A

tentorial notch

Q

Tentorium Cerebelli
Inner margin is attached anteriorly to …

A

anterior clinoid process

Q

Tentorium Cerebelli
Describe the outer margin

A

Convex

Q

Tentorium Cerebelli
Outer margin is attached to

A

Transverse Sulcus
Upper border of Petrous Temporal Bone
Posterior Clinoid Process

Q

Tentorium Cerebelli
What are the surfaces of the outer margin?

A

Superior Surface
Inferior Surface

Q

Tentorium Cerebelli
Superior surface gives attachment to …

A

falx cerebri

Q

Tentorium Cerebelli
Inferior surface gives attachment to …

A

falx cerebelli

Q

Tentorium Cerebelli
Inferior surface is related to ____ on either side

A

cerebellar hemispheres

Q

Tentorium Cerebelli
Which venous sinuses are enclosed?

A

Right and Left Superior Petrosal Sinuses
Right and Left Transverse Sinuses
Straight Sinus

Q

Falx Cerebelli
Shape

A

Crescent

Q

Falx Cerebelli
Location

A

Projects into Posterior Cerebellar Notch

Q

Falx Cerebelli
Description

A

Base
Apex
2 Margins

Q

Falx Cerebelli
Base is attached to …

A

inferior surface of tentorium cerebelli

Q

Falx Cerebelli
Describe the apex

A

Divides into two parts and merges with sides of Foramen Magnum

Q

Falx Cerebelli
Posterior margin is attached to …

A

internal occipital crest

Q

Falx Cerebelli
Posterior margin encloses …

A

occipital venous sinus

Q

Falx Cerebelli
Describe the anterior margin

A

Concave
Free

Q

Diaphragma Sallae
Shape

A

Small
Circular
Horizontal

Q

Diaphragma Sellae
Function

A

Forms roof of Sella Turcica
Covers the Pituitary Gland

Q

Diaphragma Sellae
Has a central opening which transmits the …

A

infundibulum

Q

Diaphragm Sellae
Stretched between the …

A

4 clinoid processes

Q

Diaphragma Sellae
What runs in the anterior and posterior borders?

A

Anterior and Posterior Intercavernous Sinuses

Q

Blood Supply of Meninges

A

Middle Meningeal Artery
Anterior Meningeal Arteries (from ethmoidal artery)
Meningeal Branch (from ascending pharyngeal artery)
Meningeal Branch (from occipital artery)

Q

Nerve Supply of Meninges

A

Ophthalmic Division of Trigeminal Nerve (Tentorium Cerebelli)
Cervical Nerves
Ophthalmic Division of Trigeminal Nerve (Falx Cerebri)
Mandibular Division of Trigeminal Nerve
Maxillary Division of Trigeminal Nerve