Cranial Nerves

Question 1

which nerve arises from the pons

Answer 1

CNV - large nerve

Question 2

where does CNIII arise from

Answer 2

mid brain pontine junction

superior orbital fissure

Question 3

which nerves arise from the junction between teh pons and the medulla

Answer 3

CNVI, VII, VIII

• CNVI - superior orbital fissure
• CNVII and VIII - IAM

Question 4

which CN arise posterior to the olive

Answer 4

CNIX, X, XI

note that CNX is larger

Question 5

which CN arise anterior to the olive

Answer 5

CNXII

Question 6

describe the course of CNXI

Answer 6

spinal accessory nerve

• in the spine, enters the cranial cavity via the foramen magnum
• arises posterior to the olive of medulla
• exits cranial cavity via jugular foramen
• crosses the posterior triangle of the neck
• innervates sternocleidomastoid and trapezius
• comes out fromunder SC and pierces trapezius