norma basilis

Question 1

The foramen magnum transmits the following.

Answer 1

Through the narrow anterior part:
a. Apical ligament of dens
b. Vertical band of cruciate ligament c. Membrana tectoria
Through wider posterior part:
a. Lowest part of medulla oblongata
b Three meninges.
Through the subarachnoid space pass: a. Spinal accessory nerves
b. Vertebral arteries
c. Sympathetic plexus around the vertebral arteries
d. Posterior spinal arteries
e. Anterior spinal artery.

Question 2

Spine of sphenoid

Answer 2

• S- sphenomandibular ligament
• A- anterior ligament of malleus
• P- pterygospinous ligament

Relations
* Lateral- auriculotemporal nerve
* Medial- chorda tympany

Question 3

Styloid process

Answer 3

Muscles
* Stylohyoid muscle
* Styloglossus muscle
* Stylopharyneous muscle
Ligaments
* Stylohyoid ligament
* Stylomandibular ligament

Question 4

Squamotympanic fissure

Answer 4

• Anterior- petrosquamous fissure
• Posterior – petrotympanic fissure
• C- chordatympany
• A- anterior ligament of malleus
• A- anterior tympanic artery

Question 5

Mastoid canaliculi (lateral to jugular fossa)

Answer 5

• Auricular branch of vagus

Question 6

Tympanic canaliculi ( between Juglar fossa and carotid canal)

Answer 6

• Tympanic branch of glossopharyngeal nerve