CNS

Question 1

Draw Circle of Willis

Question 2

Fossa of the cranium + contents

Answer 2

Cribriform plate of ethmoid bone: CNI
optic canal: CN II
SOF 3,4,V1, 6
foramen rotundum V2
foramen ovale V3
foramen spinosum middle meningeal artery, V3 (?)
internal acoustic meatus 7,8
jugular foramen 9,10,11
hypoglossal 12
foramen magnum 11 spinal division

Question 3

Cranial nerves and function (s/m/both)

Question 4

Carotid sheath contents

Answer 4

common carotid and internal carotid artery (medial to)
internal jugular vein
vagus nerve CNX (posterior to above two vessels)
deep cervical LNs

Question 5

Branches of external carotid artery

Answer 5

Some angry old lady found out PMS
Superior Thyroid artery
Ascending pharyngeal artery
Lingual artery
Facial artery
Occipital artery
Posterior Auricular artery
Maxillary artery
Superficial temporal artery

Question 6

Cutaneous branches of opthalmic, maxillary and mandibular branches of Trigeminal nerve (V)

Answer 6

CNV- Ophthalmic division-cutaneous branches:
Supraorbital
Supratrochlear
Lacrimal
Infratrochlear
External nasal

CNV- Maxillary division-cutaneous branches:
Zygomaticotemporal
Infra-orbital
Zygomaticofacial

CNV- Mandibular division-cutaneous branches:
Auriculotemporal
Mental
Buccal

Question 7

EOM muscle function when seeing operative word(s)
superior =
oblique =
rectus =
inferior =

Answer 7

superior = medial rotation
oblique = abducts
rectus = elevate/depression
inferior = lateral rotation