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

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A

Concave

Q

Falx Cerebri
The lower border contains the …

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A

inferior sagittal sinus

Q

Tentorium Cerebelli
Shape

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A

Tent shaped fold

Q

Tenotrium Cerebelli
Location

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A

Forms roof over posterior cranial fossa

**Tentorium Cerebelli** Divides the cranial cavity into ...

supratentorial and infratentorial compartments

**Tentorium Cerbelli** Description

2 margins 2 surfaces

**Tentorium Cerebelli** Margin Names

Inner (free) Margin Outer (attached) Margin

**Tentorium Cerebelli** Describe the inner margin

Concave

**Tentorium Cerebelli** Inner margin bounds the ...

tentorial notch

**Tentorium Cerebelli** Inner margin is attached anteriorly to ...

anterior clinoid process

**Tentorium Cerebelli** Describe the outer margin

Convex

**Tentorium Cerebelli** Outer margin is attached to

Transverse Sulcus Upper border of Petrous Temporal Bone Posterior Clinoid Process

**Tentorium Cerebelli** What are the surfaces of the outer margin?

Superior Surface Inferior Surface

**Tentorium Cerebelli** Superior surface gives attachment to ...

falx cerebri

**Tentorium Cerebelli** Inferior surface gives attachment to ...

falx cerebelli

**Tentorium Cerebelli** Inferior surface is related to ____ on either side

cerebellar hemispheres

**Tentorium Cerebelli** Which venous sinuses are enclosed?

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

**Falx Cerebelli** Shape

Crescent

**Falx Cerebelli** Location

Projects into Posterior Cerebellar Notch

**Falx Cerebelli** Description

Base Apex 2 Margins

**Falx Cerebelli** Base is attached to ...

inferior surface of tentorium cerebelli

**Falx Cerebelli** Describe the apex

Divides into two parts and merges with sides of Foramen Magnum

**Falx Cerebelli** Posterior margin is attached to ...

internal occipital crest

**Falx Cerebelli** Posterior margin encloses ...

occipital venous sinus

**Falx Cerebelli** Describe the anterior margin

Concave Free

**Diaphragma Sallae** Shape

Small Circular Horizontal

**Diaphragma Sellae** Function

Forms roof of Sella Turcica Covers the Pituitary Gland

**Diaphragma Sellae** Has a central opening which transmits the ...

infundibulum

**Diaphragm Sellae** Stretched between the ...

4 clinoid processes

**Diaphragma Sellae** What runs in the anterior and posterior borders?

Anterior and Posterior Intercavernous Sinuses

Blood Supply of Meninges

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

Nerve Supply of Meninges

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