6-meninges, Skull, Spinal Cord

Question 1

Which 2 types of cranial bones come in pairs?

Answer 1

Parietal & temporal

Question 2

The facial bone that splits the nose in 2

Answer 2

Vomer

*mer = meridian

Question 3

– are immovable fibrous joints bw skull bones

Answer 3

Sutures

Question 4

4 major sutures and their locations

Answer 4

1. Coronal - crown the king! Bw frontal and parietal bones
2. Lambdoid suture bw parietal and occipital bones
3. Sagittal - shared by 2 parietal bones
4. Squamous - bw temporal and parietal bones

Question 5

3 cranial fossae

Answer 5

Anterior, middle, posterior cranial fossae

Question 6

What each cranial fossa houses

Answer 6

1. Anterior cranial fossa - frontal lobe of cerebrum
2. Middle - temporal lobe of cerebrum
3. Posterior - cerebellum

Question 7

3 auditory bones

Answer 7

Malleus, incus, stapes

Question 8

4 paranasal sinuses

Answer 8

Frontal, ethmoid, sphenoid, maxillary

Question 9

Functional organization of nervous system

Answer 9

Sensory and motor nervous systems

Question 10

How are cell body LOCATION different for sensory and motor neurons?

Answer 10

Sensory neurons - cell bodies OUTside of CNS

Motor neurons - cell bodies within the spinal cord

Question 11

Enlargements of spinal cord and what they do

Answer 11

Cervical enlargement Innervates upper limbs

Lumbosacral enlargement Innervates lower limbs

Question 12

At what vertebral level does the spinal cord end

Answer 12

First or second lumbar vertebra

Question 13

The spinal cord is – than the vertebral canal that houses it

Answer 13

Spinal cord is shorter

Question 14

Name the 3 ending parts of the spinal cord from superior most to inferior most

Answer 14

1. Conus medullaris - official end of spinal cord proper
2. Cauda equina = horses tail
3. Filum terminale - thin strand of pis mater anchoring conus medullaris to coccyx

*pia mater = innermost layer of meninges, membrane surrounding brain and spinal cord

Question 15

Iliac crests are level with which vertebrae

Answer 15

L4

Question 16

The – – is the most external of meninges and fuses with connective layers surrounding spinal nerves

Answer 16

Dura mater

Question 17

– space separates dura mater from arachnoid mater and is a POTENTIAL space aka not present in healthy individuals

Answer 17

Subdural space

Question 18

The – space is a real space filled with CSF

Answer 18

Subarachnoid space

Question 19

The innermost meningeal layer that adheres directly to spinal cord

Answer 19

Pia mater

Question 20

The pia mater (innermost) has – – that anchor spinal cord to dura mater

Answer 20

Denticulate ligaments

Question 21

The axons in anterior and posterior roots

Answer 21

Anterior root - motor axons
Posterior root - sensory axons
maps

Question 22

Anterior and posterior roots unite within intervertebral foramen to become – __

Answer 22

Spinal nerve

Question 23

Every – – contains motor and sensory axons

Answer 23

Spinal nerve

Question 24

After leaving the intervertebral foramen the spinal nerves split into:

Answer 24

Dorsal primary ramus (posterior) and ventral primary ramus (anterior)

Question 25

What dorsal and ventral primary rami innervate?

Answer 25

Dorsal - deep mm of back; sensory skin of back

Ventral - trunk; upper and lower limbs

Question 26

What is the vertebral canal

Answer 26

Entire series of vertebral foramen

Question 27

What the dorsal and primary rami Innervate?

Answer 27

Dorsal primary ramus - intrinsic deep mm of back

Ventral primary ramus - portions of trunk and upper & lower limbs

Question 28

Which is larger: dorsal or ventral primary ramus?

Answer 28

Ventral primary ramus

Question 29

There are – cranial bones and – facial bones of the skull.

Answer 29

8 cranial bones

14 facial