Unit V - Intro

Question 1

How many thoracic nerve pairs are there?

Answer 1

12

Question 2

How many pairs of lumbar nerves are there?

Answer 2

5

Question 3

How many sacral nerve pairs are there?

Answer 3

5

Question 4

How many coccygeal nerve pairs are there?

Answer 4

1

Question 5

The 31 pairs of spinal nerves are attached to what structure?

Answer 5

The spinal cord

Question 6

Which spinal nerve root carries efferent axons from cell bodies located in the anterior (ventral) or lateral horns?

Answer 6

Anterior (ventral or motor) roots

Question 7

Which spinal nerve root carries axons from cell bodies located in the posterior (dorsal) root ganglion (spinal ganglion)?

Answer 7

Posterior (dorsal or sensory) root

Question 8

Where, specifically, do the separated rootlets of the spinal nerves’ posterior roots attach to the spinal cord?

Answer 8

At the posterolateral sulcus

Question 9

Where are spinal ganglia typically located?

Answer 9

Either inside or just medial to the intervertebral foramen, beyond the dura mater

Question 10

Where are the C1 and C2 spinal ganglia located?

Answer 10

On their respective vertebral arches

Question 11

What is the location of sacral ganglia?

Answer 11

Within the vertebral canal

Question 12

What is the location of coccygeal ganglia?

Answer 12

Inside the dura mater

Question 13

The meningeal branch (recurrent meningeal/sinuvertebral branch) is given off at what spinal levels?

Answer 13

All of them

Question 14

What is unique about the posterior ramus of C1?

Answer 14

It is one branch and does not split

Question 15

What is the motor supply for C1 suboccipital nerve?

Answer 15

Rectus capitis posterior major and minor, obliquus capitis superior and inferior, semispinalis capitis

Question 16

Semispinalis capitis is a part of what muscle group of the back?

Answer 16

Erector spinae

Question 17

What is the name for the posterior ramus of C1?

Answer 17

Suboccipital nerve

Question 18

What is the name of the posterior ramus of C2?

Answer 18

Greater occipital nerve

Question 19

What is the supply of the medial branch of the greater occipital nerve?

Answer 19

Sensory innervation to the posterior neck and scalp

Question 20

What is the supply of the lateral branch of the greater occipital nerve?

Answer 20

Motor supply to semispinalis capitis, longissimus capitis, and splenius capitis muscles

Question 21

What is the name for the posterior ramus of C3?

Answer 21

Third (least) occipital nerve

Question 22

What is the supply of the medial branch of the least occipital nerve?

Answer 22

Sensory supply from skin of posterior neck

Question 23

What is the supply of the lateral branch of the third (least) occipital nerve?

Answer 23

Motor supply to semispinalis capitis, longissimus capitis, and splenius capitis muscles (same as C2)

Question 24

What is the supply of the medial branches of the posterior rami of C4-C8?

Answer 24

Sensory supply from the skin of the posterior neck

Question 25

What is the supply of the lateral branches of the posterior rami of C4-C8?

Answer 25

Iliocostalis cervicis, longissimus cervicis and capitis

Question 26

When is the meningeal branch given off of spinal nerves?

Answer 26

Shortly after combining into a mixed spinal nerve

Question 27

The meningeal branch of spinal nerves reenter the vertebral canal through what opening?

Answer 27

Intervertebral foramen

Question 28

After passing through the intervertebral foramen, the meningeal branch of the spinal nerves divide into what branches?

Answer 28

Ascending, descending, and transverse branches

Question 29

What do the meningeal branches of the spinal nerves supply?

Answer 29

Dura, blood vessels, periosteum, ligaments, and intervertebral discs in the anterior and lateral portions of the canal (somatosensory and sympathetic supply)

Question 30

What types of fibers are carried in the meningeal branches of the spinal nerves?

Answer 30

Sympathetic and somatosensory fibers

Question 31

Mixed spinal nerves divide into what two rami?

Answer 31

Anterior (ventral) and posterior (dorsal) primary rami

Question 32

What is the only mixed nerve level that does not split into medial and lateral branches?

Answer 32

C1

Question 33

Which is usually larger: anterior or posterior primary rami of mixed spinal nerves?

Answer 33

Anterior rami

Question 34

At which mixed nerves is the anterior ramus actually smaller than the posterior (deviation from the norm)?

Answer 34

C1, S4, and S5

Question 35

The posterior primary rami of mixed spinal nerves have what motor supply?

Answer 35

Deep back muscles

Question 36

The posterior primary rami have what sensory supply?

Answer 36

To the skin on either side of the spine

Question 37

What muscles are supplied by the anterior primary rami of mixed spinal nerves?

Answer 37

Anterior and lateral trunk muscles, skeletal muscles in the extremities

Question 38

What is the sensory innervation of the anterior primary rami of the mixed spinal nerves?

Answer 38

Skin of extremities as well as anterior and lateral trunk

Question 39

How many pairs of cervical nerves are there?

Answer 39

8

Question 40

Which rami of the mixed spinal nerves contribute to the great plexuses of the body (cervical, brachial, sacral...)?

Answer 40

Anterior primary rami

Question 41

What is the location of the sympathetic chain communications?

Answer 41

Either at or just medial to the bifurcation of the mixed spinal nerve

Question 42

What are the two ways in which preganglionic sympathetic fibers from the white ramus communicans enter the sympathetic chain?

Answer 42

Synapse in the trunk either at the same level or above/below | Pass through trunk and are carried in splanchnic nerves

Question 43

What "family" of muscles is supplied by the posterior rami of C2 and C3?

Answer 43

Capitis (semispinalis, longissimus, and splenius capitis)

Question 44

What muscle is supplied by the posterior rami of C2-C8?

Answer 44

Longissimus capitis