Intro to Skull

How many bones make up the skull?

• 8

• 14

• 22

• 32

Answer explanation

22 bones make up the skull:

8 cranial bones and 14 facial bones

8 cranial bones: frontal, occipital, 2 parietal, 2 temporal, sphenoid, ethmoid

Which bones make up the skull cap?

• frontal, temporal, sphenoid, occipital

• frontal, right/left parietal, occipital

• frontal, right/left parietal, temporal

• frontal, sphenoid, occipital, temporal

Answer explanation

Calvaria (skull cap) is consisting of the frontal, right/left parietal, and occipital

Which bones make up the floor of the cranium?

• right/left temporal, sphenoid, frontal

• sphenoid, ethmoid, occipital, frontal

• right/left temporal, sphenoid, ethmoid

• frontal, right/left parietal, occipital

Answer explanation

The floor consist of the right/left temporal, sphenoid, and ethmoid

Another name for the external occipital protuberance

• gonion

• inion

• wing

• bump

The widest portion of the entire skull is located between the:

• left and right temporal bones

• frontal and occipital bone

• parietal tubercles

• glabella to inion

Smooth, raised prominence between the eyebrows that is located above the bridge of the nose

• glabella

• nasion

• acanthion

• mentum

Which bone is the foramen magnum located

• occipital

• temporal

• sphenoid

• parietal

Answer explanation

The foramen magnum is an opening allowing the passage of the spinal cord and is located on the occipital bone. There are occipital condyles on either side of the foramen magnum and they articulate with depressions on C1 and form the atlanto-occipital joint

Which bones house the organs of hearing and balance

• Frontal

• Sphenoind

• Temporal

• Occipital

Answer explanation

Temporal bone houses the organs of hearing and balance.

The petrous ridge and pyramid is an important structure viewed during skull x-rays. Which bones house the petrous portion

• Frontal

• Sphenoid

• Temporal

• Ethmoid

Answer explanation

The petrous portion is located in the temporal bones and a medial structure. IT is very dense and is known as the petrous pyramid. The petrous portion is the thickest and densest portion of the skull. The upper border of the petrous portion is called the petrous ridge.

Which bone anchors all eight of the cranial bones

• ethmoid

• occipital

• right/left temporal

• sphenoid