Chapter 11 Part A

How many cranial bones are there?

8

How many facial bones are there?

14

What are the four cranial bones that form the calvaria (skull cap)?

Frontal, R/L parietals, Occipital

What are the four cranial bones that form the floor of the cranium?

R/L Temporal, Ethmoid, and Sphenoid

What is the small horizontal plate of the ethmoid called?

Cribriform plate

What is the vertical plate of the ethmoid bone forming the upper portion of the bony nasal septum called?

Perpendicular plate

What is a structure found in the middle of the sphenoid bone that surrounds the pituitary gland?

Sella turcica

What is the posterior aspect of the sella turcica called?

Dorsum sellae

Which structure of the sphenoid bone allows for the passage of the optic nerve and is the actual opening into the orbit?

Optic foramen

Which structures of the sphenoid bone help to form part of the lateral walls of the nasal cavities?

Medial and lateral pterygoid processes