Head and Neck

Question 1

Fontanelles in developing skull persist until…

Answer 1

2 years old,

fuse together, before = soft spots

Question 2

what is a suture in skull?

Answer 2

fibrous connection between (fused) bones;

• sagittal
• coronal
• lambdoid

Question 3

bregma

Answer 3

the point at which multiple sutures meet up;

Question 4

pterion

Answer 4

special, particularly thin area in skull;

on middle lateral portion, where coronal and sagittal sutures line up.

Question 5

characteristics of dura mater covering brain

Answer 5

Strongest layer of meninges, adheres to skull;
2 layers: periosteal and meningeal
*mostly adherent but w/ space in middle for venous sinuses

Question 6

CSF (cerebral spinal fluid) mostly located in…

Answer 6

subarachnoid space

* space maintained by trabeculae

Question 7

blood supply to meninges

Answer 7

1. anterior meningeal aa (from ethmoid aa)
2. middle meningeal a (from maxillary a)
3. posterior meningeal aa (from occipital and ascending pharyngeal aa)

Question 8

sensation in brain?

Answer 8

No!
BUT do have sensory innervation of meninges to sense swelling/shrinkage
– from trigeminal and upper cervical nn.