Fossa and foramen

Question 1

What is the sulcus chiasmatis?

Answer 1

Anterior of the middle cranial fossa
Lies between optic canals and infront of sell turcica

Question 2

What is sella tucica? Bone? COntains?

Answer 2

Central flat ridge of sphenoid bone between optic canals

Lies between anterior and posterior clinoid processes

Hypophyseal fossa
- pituitary gland

Question 3

What boen is optic canal in? What does it contain

Answer 3

Sphenoid

Optic nerve
Ophthalmic artery

Question 4

What is the location of SOF? Contains?

Answer 4

Anterior to cavernous sinus
BEtween greater and lesser sphenoid wings

Above the CTR:
Lacrimal, frontal, trochlear nerves

Below:
Occulomotor, abducens, nasociliary nerves
Superior ophthalmic veins

Question 5

Where is the foramen rotundum? What does int contain?

Answer 5

GReater wing of sphenoid posterior to SOF

Maxillary nerve CNV2

Question 6

Where is foramen ovale? What does it convey?

Answer 6

Greater wing of sphenoid posteiror to foramen rotundum

O - otic ganglion
V - V3 - mandibular branch of trigeminal
A - Accessory meningeal nerve
L - lesser petrosal nerve
E - emissary vein

Question 7

Where is foramen spinosum? What does it convey?

Answer 7

GReater wing of sphenoid posterior to foramen ovale

MMA
MMV

Question 8

Where is foramen lacerum?
What does it convey?

Answer 8

MEdial junction of petrous part temporal bone, basilar part occipital bone, greater wing sphenoid bone

Conveys internal carotid artery
(from caritod canal to cavernous sinus)

Question 9

What is the trigeminal impression?

Answer 9

Anterior part of the petrous part of temporal bone
Houses trigeminal ganglion

Question 10

Where is foramen magnum? What does it convey?

Answer 10

Posterior to clivus, central basilar portion of occipital bone in posterior cranial fossa

Medulla na meninges
AScending accessory nerves
Vertebral arteries

Question 11

Where is teh hypoglossal canal?
Conveys?

Answer 11

Anterolateral wall of foramen magnum

CN XII Hypoglossal nerve

Question 12

Where is jugular foramen? Conveys?

Answer 12

MEdial third of junction between petrous temporal bone and occipital bone

Inferior petrosal nerve
Sigmoid sinus

IX, X, XI CN

Question 13

Internal acoustic meatus?

Answer 13

Posterior of petrous temporal bone between foramen lacerum and jugular formane

CN VII, VIII

Question 14

TRansverse groove sinus

Answer 14

Lateral aspect of internal occipital bone

Transverse sinus