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Anatomy- ECVDI > spinal nerves > Flashcards

spinal nerves Flashcards

1
Q
A
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2
Q

how are the lumbar nerves numbered?

A

after the intervertebral foramen they exit the vertebral canal from and the vertebral body cranial to it.

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3
Q

the nerve roots for the first lumbar nerve are at what level?
a) L1
b) L1-2
c) L2
d) L3

A

L1-2. as traced caudally the segments of the spinal cord are shorter than the vertebral segments. this means the spinal cord ends around the L6-7 ish. there fore the last several vertebral roots run within the vertebral canal a long distance before exiting

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4
Q

true or false, all lumbar spinal vertebrae follow the same path and same confluence of spinal ganglia

A

false, there is a lot of variation, see page 737 millers

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5
Q

which branches of the lumbar nerves form the main nerves of the hindlimbs in the lumbosacral plexus
a) dorsal branches
b) ventral branches

A

B. the dorsal branches go to the meninges, epaxial muscles and cutaneous tissues

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6
Q

which lumbar and sacral nerves form the lumbosacral plexus?
a) all lumbar and sacral ventral branches
b) all lumbar and the first two sacral ventral nerve branches
c) the last 5 lumbar and all (3)sacral nerve ventralbranches

A

C

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7
Q

which is true?
a) the lumbar plexus innervates the cranial and medial aspect of the thigh and cutaneous tissues, and the sacral plexus innervates the caudal and lateral aspect of the thigh as well as all the muscles of the crus, pes and skin
b) the lumbar plexus innervates the caudal and medial aspect of the hindlimb (thigh and cutaneous tissues), and the sacral plexus innervates the cranial and lateral aspect of the thigh, as well as all the muscles of the crus, pes and skin
c) the lumbar plexus innervates the caudal and lateral aspect of the hindlimb (thigh and cutaneous tissues), and the sacral plexus innervates the cranial and medial aspect

A

A. there is overlap to most muscles are innervated by more than one spinal segment.

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8
Q

which nerves generally innervate the quadriceps, iliopsoas, and sartorius?
a) femoral (L3,4,5)
b) obturator (L4,5,6)
c) cranial gluteal (L6-7,s1)

A

A

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9
Q

which nerves generally innervate the external obturator, pectineus, gracilis and adductor?
a) femoral (L3,4,5)
b) obturator (L4,5,6)
c) cranial gluteal (L6-7,s1)
d) caudal gluteal l7, s1, s2

A

B

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10
Q

which nerves generally innervate the middle and deep gluteal?
a) femoral (L3,4,5)
b) obturator (L4,5,6)
c) cranial gluteal (L6-7,s1)
d) caudal gluteal l7, s1, s2

A

C

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11
Q

which nerves generally innervate the superficial gluteal and sometimes the middle gluteal?
a) femoral (L3,4,5)
b) obturator (L4,5,6)
c) cranial gluteal (L6-7,s1)
d) caudal gluteal l7, s1, s2

A

D

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12
Q

which nerves generally innervate the biceps femoris, semimembranous, and semitendinous?
a) femoral (L3,4,5)
b) obturator (L4,5,6)
c) sciatic L6, L7, s1, s2
d) caudal gluteal l7, s1, s2

A

C

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13
Q

which nerve performs the patellar reflex?

A

femoral nerve

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14
Q

which nerve performs the perianal relfex?

A

pudendal

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15
Q

which nerve performs the flexor reflex in the hindlimbs?

A

sciatic

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16
Q

where does the c1 nerve exit the vertebral canal?
a) transverse foramen
b) alar foramen
c) c1-c2 intervertebral foramen
d) lateral foramen

A

D (the most cranial foramen in c1). see spinal anatomy. a and b are the same

17
Q

where does the c2 nerve root exit the vertebral canal?
a) transverse foramen
b) alar foramen
c) c1-c2 intervertebral foramen
d) lateral foramen

A

c

18
Q

how many cervical spinal cord segments are there?
a) 6
b) 7
c) 8
d) 9

A

c) 8

19
Q

where does the last cervical segment nerve root exit the vertebral canal?
a) c7 transverse foramen
b) c7-t1 intervertebral foramen
c) t1- t2 intervertebral foramen
d) t1 transverse foramen

A

B

20
Q

which muscles does the suprascapular nerve (c(5), 6, 7) innervate (more than one)?
a) subscapularis
b) supraspinatus
c) infraspinatus
d) biceps brachii

A

b,c

21
Q

which nerve innervates the subscapularis muscle?
a) subscapular (c6-7)
b) subscapular (c7-8)
c) musculocutaneous (c6-7)
d) musculocutaneous (c7-8)

A

A. also sometimes the axillary c6,7,8

22
Q

which muscle is not innervated by the musculocutaneous nerve?
a) biceps brachii
b) triceps brachii
c) brachialis
d) coracobrachialis

A

B

23
Q

the triceps brachii is innervated by which nerve?
a) ulnar c8, t1, (t2)
b) median c8, t1, (t2)
c) axillary c6,7,8
d) radial c7,8 t1,2

A

D

24
Q

the extensor carpi radialis, common digital extensor and lateral digital extensor (and ulnaris lateralis/ extensor carpi ulnaris) muscles are innervated by which nerve?
a) radial
d) ulna
c) median

A

A. (radius on the cranial side, same as the extensors)

25
Q

the flexor muscles of the forelimb are innervated by which nerves?
a) radial and ulnar
b) radial and median
c) median and ulnar
d) radial, median and ulnar

A

C

Anatomy- ECVDI (11 decks)

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