Anatomy 11: Cranial Nerves and SOL

Question 1

What are the 3 jaw closing muscles and 1 opening muscles and their supply?

Answer 1

Closing:
Masseter, Temporalis, Medial Ptergoid

Opening:
Lateral Pterygoid

Supplied by CNV3

Question 2

What is the Chorda Tympani?

Answer 2

Branch of CNVII

Taste buds of the anterior 2/3rds of the tongue

Parasympathetic supply to the submandibular and sublingual glands

Question 3

What does the Chorda Tympani join to supply the submandibular and sublingual glands?

Answer 3

Joins Lingual nerve (CNV3)

Question 4

Left recurrent laryngeal vs right recurrent laryngeal?

Answer 4

Left: curves under arch of the aorta

Right: curves under the right subclavian artery

Question 5

Where is the bleed in an extra-dural haemorrhage?

Answer 5

Between the bone and dura

Ruptured middle meningeal artery

Question 6

Where is the bleed in a sub-dural haemorrhage?

Answer 6

Separates the dura from the arachnoid
Torn cerebral veins
Falls in the elderly

Question 7

Where is the bleed in an sub-arachnoid haemorrhage?

Answer 7

Into the CSF of the subarachnoid space

Ruptured Berry Aneurysm

Question 8

What are the layers which the needle goes through in an epidural?

Answer 8

Supra and Interspinous Ligaments
Ligamentum Flavum
Epidural space
Dura mater and arachnoid mater simultaneously 
CSF

Question 9

At what level should a lumbar needle be passed through?

Answer 9

L3/4