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What anchors the falx cerebri?

Crista galli

1

What runs through the cribriform plates?

Olfactory cn

2

SUPERIOR ORBITAL FISSURE
transmits ?

CN III, IV, VI and V1-Opthalmic division

3

OPTIC CANAL transmits ?

CNII (optic nerve) and ophthalmic artery

4

FORAMEN ROTUNDUM transmits ?

CN V2 (maxillary division) to pterygopalatine fossa)

5

FORAMEN OVALE transmits ?

CN V3 (mandibular division) to infratemporal fossa

6

FORAMEN SPINOSUM
transmits ?

middle meningeal a & v

7

FORAMEN MAGNUM
transmits ?

medulla, meninges, vertebral and spinal vessels, and the spinal root of CN XI

8

INTERNAL ACOUSTIC MEATUS
transmits ?

CN VII and CN VIII

9

JUGULAR FORAMEN
transmits?

the internal jugular vein, CN IX, CN X and CN XI

10

HYPOGLOSSAL CANAL
transmits?

CN XII

11

Tentorium Cerebelli functions

 Separates occipital lobes and cerebellum
 Falx cerebri attaches at midline holding up forming a tent like appearanc

12

Sigmoid sinus ends where _____ begins...

Internal jugular vein

13

Auditory Ossicles

 Malleus, Incus, Stapes
 Transmit vibration from eardrum to inner ear
 Amplify sound 20X
 Suspensory ligaments hold ossicles in middle ear

14

ORBIT contains

1) eyeball
2) extra-ocular
muscles
3) ophthalmic
vessels
4) CN II,III, IV,
V1 and VI

15

Petrous temporal
houses ?

organs of hearing and balance

16

Dural infoldings

 Infoldings separate cranial cavity into compartments
 Limit the movement of the brain
 4 infoldings exist
 Falx Cerebri
 Tentorium Cerebelli
 Falx Cerebelli
 Diaphragma Sellae

17

Falx Cerebelli

 Partially separates the cerebellar hemispheres

18

Diaphragma Sellae

 Smallest dural infolding  Covers pituitary gland

19

Arachnoid villi

 Projections of arachnoid mater through dura into
superior sagittal sinus
 Valves help CSF pass into dural sinuses

20

Paranasal Sinuses

 Air filled extensions of nasal cavity
 Frontal
 Ethmoidal
 Sphenoidal
 Maxillary
-- Largest of the sinuses

21

Pharyngotympanic (auditory) tube joins

middle ear to nasopharynx

22

Internal Ear

 Hearing and Equilibrium
 Contains the vestibulocochlear organ.
 Reception of sound
 Maintenance of balance

23

Preganglionic parasympathetic axons
leave the brainstem in four
cranial nerves:

III
VII
IX
X