ANATOMIC RELATIONSHIPS orbital structures

Question 1

Whats a single bone found in the middle portion which forms the base of the cranium?

Answer 1

Sphenoid

Question 2

Sphenoid bone is where you would find?

Answer 2

optic canal

Question 3

What is sella trucica?

Answer 3

this is a depression in the body of the sphenoid bone that contains the pituitary gland

Question 4

Whats the importance of pituitary gland?

Answer 4

if there is a damage to the pitutitary gland, it will damage the nasal fibers from each eye, therefore you will have BITEMPORAL HEMINOPSIA VISUAL FIELD DEFECT

Question 5

Where is optic chiasm situaated?

Answer 5

lies superior to the pituitary gland

Question 6

What are the 2 parts of the sphenoid?

Answer 6

lesser wing

Greater wing

Question 7

What connects with the lesser wing?

Answer 7

Frontal bone

Question 8

What 2 bones make up the roof of the orbit?

Answer 8

Lesser wing and frontal bone

Question 9

What makes up the greater wing?

Answer 9

connects with zygomatic bone

Question 10

What makes up the lateral wall of the orbit?

Answer 10

Greater wing and zygomatic bone

Question 11

Where is optic canal located?

Answer 11

within the lesser wing

Question 12

What is the function of the optic canal?

Answer 12

allows passage of the optic nerve and ophthalmic artery

Question 13

What are the 3 foramina are located in the greater wing of sphenoid?

Answer 13

Foramen rotundum
Foramen ovale
Foramen spinosum

Question 14

Foramen rotundum allows what nerves?

Answer 14

It transmits maxillary division (V2) of trigeminal

Question 15

Foramen ovale allows what nerves to pass through?

Answer 15

Mandibular division (V3) 
Lesser superficial petrosal nerve

Question 16

Foramen spinosum allows what nerves to pass through?

Answer 16

Middle meningeal artery

Question 17

What is the gap that is found between lesser and greater wing?

Answer 17

Superior orbital fissure (SOF)

Question 18

Where is SOF located?

Answer 18

Located between posterior lateral wall and superior wall

Question 19

Where are the cavernous sinus found?

Answer 19

Just posterior to the SOF

Question 20

What is cavernous sinus?

Answer 20

they are the large venous channel that travels on each side of the body of the sphenoid

Question 21

What is Common tendious ring?

Answer 21

This is a circular band of connecting tissue that found anterior to the superior orbital fissure

Question 22

What muscles are found here?

Answer 22

Origin for the recti muscles

also known as annulus of zinn

Question 23

what nerves passes through SOF and CTR?

Answer 23

NOA

Nasociliary
Oculomotor
Abducences

Question 24

Which nerves/vessels passes through SOF but above the CTR?

Answer 24

Superior ophthalmic vein
Frontal nerve
Lacrimal Nerve
Trochlear nerve

Question 25

What passes thorugh inferior orbital fissure and inferior to the CTR?

Answer 25

Inferior ophthalmic vein

Question 26

Optic canal have?

Answer 26

Optic nerve and ophthalmic artery

Question 27

What passes through carotid canal?

Answer 27

internal carotid arery and sympathetic plexus

Question 28

what passes thorugh Supraorbital foramen

Answer 28

Supraorbital nerve (part VI) and vessels

Question 29

What passes through infraorbital formane?

Answer 29

Infraorbital nerve (part V2) and vessels

Question 30

what passes through mandibular foramen?

Answer 30

Inferior alevolar nerve and vessel

Question 31

What passes through stylomastoid formn?

Answer 31

facial nerve

Question 32

What makes up the orbital floor and prone to most fractures?

Answer 32

maxillary
palatine
zygomatic

“my pal gets his z’s on the floor”