Sphenoid Bone

Question 1

Where is the body of the sphenoid

Answer 1

central midline area

Question 2

Which are the lesser wings

Answer 2

These are the smaller thin posterior projections from the body

Question 3

Which are the greater wings

Answer 3

These are attached to the body and they project laterally

Question 4

Where is the frontal margin of the greater wing

Answer 4

These are the very top edges of the greater wing

Question 5

Where is the parietal margin of the greater wing

Answer 5

Top superior edges of the greater wings

Question 6

Where is the squamous margin of the greater wing

Answer 6

These are the big curved angle of the greater wing

Question 7

Where would BOBBS be located

Answer 7

This would be on the inferior base of the sphenoid

Question 8

Where are the optic canals

Answer 8

Either side of the body, anterior to the lesser wings kind of under them

Question 9

Where is the sella Turcica (Turkish saddle)

Answer 9

The saddle shaped depression on the endocranial surface, onto of the body

Question 10

Where is the hypophyseal fossa

Answer 10

Deepest depression on the sella hold the pituitary gland

Question 11

Where is the dorsum sellae

Answer 11

This is the square plate of bone which forms the posterior boundary of the sella turcica

Question 12

Where is the posterior chinois process

Answer 12

These are the two tubercles located at the superolateral corners of the dorsum sellae

Question 13

Where is the Clivus

Answer 13

The slight endrocranial hollow posterior from the dorsum sellae

Question 14

Where is the sphenoidal sinuses

Answer 14

Large hollows within the body of the sphenoid

Question 15

Where is the sphenoidal rostrum

Answer 15

This is the midline bony projection on the anterior surface of the body of the sphenoid

Question 16

Where is the sphenoidal crest

Answer 16

Extends from the sphenoidal rostrum superiorly along the midline of the body

Question 17

Where are the superior orbital fissures

Answer 17

These are the open spaces between the inferior surfaces of the lesser wings and the anterior surfaces of the greater wings

Question 18

Where is the foramen rotundum

Answer 18

These are situated in the most anterior and medial part of the greater wings along side the body

Question 19

Where is the foramen ovale

Answer 19

This is located of the posterior view on the greater wing under the pterygoid plate

Question 20

Where is the foramen spinosum

Answer 20

This is located on the posterior view under the foramen ovale

Question 21

Where are the infratemporal crest

Answer 21

these mark the ectocranial surfaces of the greater wings they form the base of the temporal fossae at about the level of the zygomatic arches

Question 22

Which are the orbital surfaces

Answer 22

It the smooth parts on the front of the greater wings

Question 23

Where are the anterior clinoid processes

Answer 23

These are the small posterior projections of the lesser wings

Question 24

Where are the pterygoid processes

Answer 24

These are the legs of the owl and are divided into two plates

Question 25

Which is the lateral and which is the medial pterygoid plate

Answer 25

On the legs of the owl the lateral if the furthest to the edge and for the medial is the closest to the middle

Question 26

Where is the pterygoid hamulus

Answer 26

This is the hook like process forming the posterolateral basal corner of each medial pterygoid plate

Question 27

Where are the pterygoid canals

Answer 27

These start above the pterygoid plates and run along their base

Question 28

How would you side the sphenoid

Answer 28

From the pterygoid plates the fossa is inferior, for the greater wing the orbital surface is anterior, the lesser wing tips are lateral