Unit III - Parietal bone

Question 1

What are the two parts of the parietal bone?

Answer 1

external surface

internal surface

Question 2

What attaches to the external surface of the parietal bone?

Answer 2

temporalis muscle

attachment: temporal fossa –> coronoid process, anterior border (temporal crest) of the ramus of the mandible
function: elevation and retraction (posterior aspect of muscle) of mandible
innervation: mandibular n.
blood supply: deep temporal a.

Question 3

What are the 2 parts of the external surface of the parietal bone?

Answer 3

superior temporal line

inferior temporal line

Question 4

What attaches to the superior temporal line?

Answer 4

temporal fascia

Question 5

What attaches to the inferior temporal line?

Answer 5

temporalis muscle

attachment: temporal fossa –> coronoid process, anterior border (temporal crest) of the ramus of the mandible
function: elevation and retraction (posterior aspect of muscle) of mandible
innervation: mandibular n.
blood supply: deep temporal a.

Question 6

What are the 3 parts of the internal surface of the parietal bone?

Answer 6

groove for the superior sagittal sinus

granular foveolae

grooves for middle meningeal a.

Question 7

what is the function of the groove for the superior sagittal sinus?

Answer 7

houses the superior sagittal sinus

Question 8

What is the function of the granular foveolae

Answer 8

houses arachnoid granulations

Question 9

What is the function of the grooves for the middle meningeal a.?

Answer 9

houses the middle meningeal a.