Spinal Nerves

Question 1

What is a specific feature of all spinal nerves?

Answer 1

paired!

Question 2

What are the two roots of the spinal chord? What do they include?

Answer 2

(1) DORSAL ROOT ~ radix dorsalis
+ dorsal root ganglion
- epaxial muscles (extention and lateral flexion of spinal column)
- sensory

(2) VENTRAL ROOT ~ radix ventralis
- hypaxial muscles (flexion of vertebral column, thorax and abdomen)
- motor

Question 3

What do spinal nerves exit the spinal column through?

Answer 3

• for. intervertebralis
• for. vertebrale laterale (atlas)
• for. sacralia ventralia

Question 4

N. C1: nerve and innervation.

Answer 4

N. C1: ramus dorsalis
forms: n. subocipitalis
innervates: auris externa (scapha)

Question 6

What is the brachial plexus?

Answer 6

A network of ventral branches (rami ventrales) of:
Nn.C(6-8) - Nn.Th(1-2)

Su: Nn.C(5) - Nn.Th(1-2)

Question 7

State the location of the brachial plexus.

Answer 7

Nn. C(6-8) - Th(1-2)
- cranial to 1st rib
- b/w m. longus coli and m. scalenus

su: C(5)

Question 8

State the different nerves involved in the brachial plexus.

Answer 8

n. subscapulares
n. pectorales craniales
n. pectorales caudales
n. thoracicus longus
n. thoracodorsalis
n. thoracicus lateralis
n. suprascapulares
n. musculocutaneus
n. medianus
n. axillaris
n. radialis
n. ulnaris

Question 9

What does the cranial pectoral nerve innervate?

Answer 9

• superficial pectoral muscle
• subclavian muscle

Question 10

What does the caudal pectoral nerve innervate?

Answer 10

• deep pectoral muscle

Question 11

What does the long thoracic nerve innervate?

Answer 11

thoracic part of the ventral serrate muscle

Question 12

What does the thoracodorsal nerve innervate?

Answer 12

broadest muscle of the back

Question 13

What does the lateral thoracic nerve innervate?

Answer 13

cutaneous muscle (lateral on thorax covering teh triceps muscle)

Question 14

What does the intercostobrachial nerve innervate?

Answer 14

cutaneous muscle (lateral on thorax covering teh triceps muscle)

Question 15

Which nerve forms the ansa axillaris?

Answer 15

n. musculocutaneus
n. medianus

Question 17

What does the median nerve form?

Answer 17

ansa axillaris

Question 18

What does the suprascapular nerve innervate?

Answer 18

• supraspinatus muscle
• infraspinatus muscle

Question 19

What does the axillary nerve innervate?

Answer 19

flexors of the shoulder joint:
- deltoid muscle
- major teres muscle
- minor teres muscle
- cleidobrachial muscle

Question 20

What does the subscapular nerve innervate?

Answer 20

• subscapular muscle

Question 21

What does the musculocutaneous nerve innervate?

Answer 21

• coracobrachial muscle
• biceps
• brachial muscle
• skin of antebrachium

Question 22

What is the location of the lumbosacral plexus?

Answer 22

L(4-7) - S(2)
- ventral branches (rami ventrales)

• medial wall of plexus, adjacent part of flank
• plecus lumbalis + plecus sacralis + truncus lumbosacralis

Question 23

What nerves are part of the lumbosacral plexus?

Answer 23

• n. cutaneus femoris lateralis
• n. femoralis
• n. obturatorius
• n. gluteus cranialis
• n. gluteus caudalis
• n. cutaneous femoris caudalis

Question 24

What nerves arise from the lumbar plexus?

Answer 24

• iliohypogastic nerve
• ilioinguinal nerve
• genitofemoral nerve
• lateral cutaneous femoral nerve
• femoral nerve
• obturator nerve

(lumba:
ill if hypo
obtuse
ill if inglish
generally in the legs (femur)
cute legs
legs

Question 25

What nerves arise from the sacral plexus?

Answer 25

- cranial gluteal nerve - caudal gluteal nerve - caudal cutaneous nerve of the femur - pudendal nerve - caudal rectal nerves

Question 26

State the origin of the sympathetic trunk.

Answer 26

Th(1-2) - L(2-4) - cornu laterale - ventral root

Question 27

What cranial nerves are involved in the sympathetic trunk of the ANS?

Answer 27

9, 11, 12

Question 28

What cranial nerves are involved in the parasympathetic trunk of the ANS?

Answer 28

3, 7, 9, 10