Neuroanatomy of the Trunk and Upper Body

Question 1

where does the spinal cord extend from?

Answer 1

foramen magnum to ~ the level of the disc between vertebrae L1 and L2

Question 2

what is the distal end of the spinal corn called?

Answer 2

Conus medullaris

Question 3

true or false: spinal nerves contain only sensory neurons

Answer 3

FALSE: spinal nerves contain both sensory and motor neurons

Question 4

what is it called when nerves contain both sensory and motor neurons

Answer 4

mixed nerve

Question 5

what are the spinal nerves found in the thorax called

Answer 5

intercostal nerves

Question 6

where in the ribs do the intercostal nerves run

Answer 6

run in inferior groove of ribs

Question 7

what do the intercostal nerves supply motor innervation to?

Answer 7

intercostal and abdominal muscles

Question 8

what do the intercostal nerves supply sensory innervation to?

Answer 8

the skin of thoracic and abdominal wall

Question 9

nerves above and below the thorax tend to form ____

Answer 9

plexuses

Question 10

what plexuses are formed by the lower limb?

Answer 10

lumbar and sacral plexuses

Question 11

what plexus is formed by the upper limb?

Answer 11

brachial plexus

Question 12

what plexus is formed by the neck?

Answer 12

cervical plexus

Question 13

what spinal cord segments does the cervical plexus cover?

Answer 13

C1-C4

Question 14

the cervical plexus sits ____ to sternocleidomastoid

Answer 14

deep

Question 15

what does the cervical plexus supply to?

Answer 15

supplies skin and muscles of neck

Question 16

what is the most important nerve of the cervical plexus? why?

Answer 16

phrenic nerve – provides sensory and motor innervation to the diaphragm

Question 17

what spinal cord segments does the brachial plexus cover?

Answer 17

C5, C6, C7, C8, T1

Question 18

where does the brachial plexus emerge and run ?

Answer 18

between the anterior and middle scalene muscles, run over rib , under the middle third of the clavicle and then into the axilla

Question 19

what are the 5 terminal branches from the brachial plexus?

Answer 19

1) musculocutaneous nerve
2) Median nerve
3) Ulnar Nerve
4) Radial Nerve
5) Axillary Nerve

Question 20

where does the musculocutaneous nerve supply?

Answer 20

supplies anterior brachium muscles

Question 21

what is another name for the median nerve

Answer 21

the “flexor” nerve

Question 22

where does the median nerve supply?

Answer 22

supplies forearm flexors

Question 23

where does the ulnar nerve supply?

Answer 23

supplies flexor carpi ulnaris, 1/2 flexor digitorum profundus and most intrinsic muscles of the hand

Question 24

where is the median nerve found

Answer 24

behind the medial epicondyle of the humerus

Question 25

what is another name for the radial nerve

Answer 25

the “extensor” nerve

Question 26

where does the radial nerve supply?

Answer 26

supplies posterior upper limb

Question 27

where does the axillary nerve supply

Answer 27

supplies teres minor and deltoid, as well as skin over deltoid

Question 28

when is the axillary nerve damaged

Answer 28

when GH joint is dislocated