Foramina of the skull

Question 1

^{Optical canal}

Answer 1

optic nerves

sphenoid bone

Question 2

Superior orbital fissure

Answer 2

for blood vessels and nerves of the orbit:

Oculomotor nerve III

trochlear nerve IV

ophthalmic devisions of the trigeminal nerve V

abducens nerve VI

ophthalmic veins

sphenoid bone

Question 3

Foramen rutundum

Answer 3

Maxiliary devision of the trigeminal nerve V_2:

provides sensation of the face

sphenoid bone

Question 4

Foramen ovale

Answer 4

Mandibular divsion of the trigeminal nerve V₃

controls the muscles that moves the lower jaw and provides senstory information from that area

sphenoid bone

Question 5

Foramen spinosum

Answer 5

for blood vessels and nerves of the jaws

sphenoid bone

Question 6



Hypophyseal fossa

Answer 6

depression within the sella turcica:

holds the pituitary gland

sphenoid bone

Question 7

Carotid canal

Answer 7

for internal carotid artery

Question 8



Foramen lacerum

Answer 8



For carotid and small arteries

Hyaline cartilage

Auditory tube

temporal bone

Question 9

External acoustic meatus (canal)

Answer 9

air in the meatus conducts sound to eardrum

Question 10

Stylomastoid foramen

Answer 10

facial nerve:

provides motor control of the face

Question 11

Internal acoustic meatus (canal)

Answer 11

for blood vessels and nerves of the inner ear:

vestibulcochlear nerve from sense organs for hearing and balance

facial nerve enters here & exist at stylomastoid foramen

Question 12

Supra-orbital foramen

Answer 12

for blood vessels of eyebrows, eyelids, and frontal sinuses:

supra-orbital neve

sensory branch of ophthalmic nerve

frontal bone

Question 13

Foramen magnum

Answer 13

medulla oblongata

vertebral arteries

accessory nerve XI - providers motor control over several neck and back muscles

meninges

occipital bone

Question 14

Hypoglossal canal

Answer 14

Hypoglossal nerve XII - provides motor control to muscles of the tongue

Question 15

Jugular foramen

Answer 15

Glassopharyngeal nerve IX - provides taste sensation

Vagus nerve X - visceral function

Accesory nerve XI - motor control of several muscles of the neck and bacl muscles

Question 16

Olfactory foramina

Answer 16

In the cribriform plate:

contains olfactory nerves: provides taste of smell

Question 17

Nasolacrimal canal

Answer 17

protects lacrimal sac and nasolacrimal duct

maxilla

Question 18

Infra-orbital foramina

Answer 18

Infraorbital nerve

maxilla branch of trigeminal nerve

infra-orbital artery

Question 19

Zygomaticofacial foramen

Answer 19

zygomatic nerve

sensory branch of maxillary nerve to cheek

Question 20



Mental foramina

Answer 20

for sensory nerves of lips and chin:

mental nerve

sensory branch of the mandiblular nerve

mental vessels

mandible

Question 21



Mandibular foramen

Answer 21

for blood vessels and nerves of lower teeth:

Inferior alveolar nerve

sensory branch of mandibular nerve