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SAM > Nerves - Spinal Cord Origin And The Muscles They Innervate > Flashcards

Nerves - Spinal Cord Origin And The Muscles They Innervate Flashcards

1
Q

Spinal cord origin of the Musculocutaneous Nerve ?

A

C6-T1

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2
Q

What 3 muscles are innervated by the Musculocutaneous Nerve?

A

Biceps brachii
Brachialis
Coracobrachialis
*sensory to the medial aspect of antebrachium

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3
Q

Spinal cord origin of the Axillary nerve?

A

C7-C8

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4
Q

What muscles are innervated by the Axillary Nerve? (Shoulder flexors/stabilizers)

A

Deltoideus
Teres mjr
Teres mnr

axillary n. Runs with the caudal circumflex humeral a.

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5
Q

Spinal cord origin of the Suprascapular Nerve?

A

C6-C7

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6
Q

What muscles are innervated by the Suprascapular Nerve (shoulder extenders)?

A

Supraspinatus

Infraspinatus

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7
Q

Spinal cord origin of the Radial Nerve?

A

C6-T2

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8
Q

What 5 muscles are innervated by the Radial Nerve?

Elbow, carpus, and digit extensors

A 
Triceps brachii
Extensor carpi radialis 
Ulnaris lateralis 
Lateral digital extensor
Common digital extensor

deep and superficial branches of radial n. Superficial brr. Runs with Cephalic v., and gives off the lateral cutaneous antebrachial n.–autonomous inn.to dorsal manus

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9
Q

Spinal cord origin of the Pudendal Nerve?

A

S1-S3

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10
Q

What muscles are innervated by the Pudendal Nerve?

A

External anal sphincter

Striated urethral muscle

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11
Q

Spinal cord origin of the Obturator Nerve?

A

L5-L6

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12
Q

What muscles are innervated by the Obturator Nerve?

Hip adductors

A

External obturator
Pectineus
Gracilis
Adductor

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13
Q

Spinal cord origin of the Femoral Nerve?

A

L4-L6

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14
Q 
What muscles (imperative to bearing weight on the pelvic limb) are innervated by the Femoral Nerve?
(Stifle extender, hip flexor, limb supporter)
A

Iliopsoas
Quadriceps
Sartorius

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15
Q

Spinal cord origin of the Sciatic Nerve?

A

L6-S1

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16
Q

What muscles are innervated by the Sciatic Nerve?

Stifle flexors and hip extensors

A

Biceps femoris
Semimembranosus
Semitendinosus

Sciatic n.passes over the greater trochanter medially, to the femur on lateral side of adductor muscle

17
Q

Spinal cord origin of the Median Nerve?

A

C7-T2

18
Q

What muscles are innervated by the Median Nerve?

Carpus and digit flexors

A

Flexor carpi radialis
Superficial digital flexor

shares common trunk w ulnar n.thru carpal canal; provides sensory to palmar aspect of the paw

19
Q

Spinal cord origin of the Common Peroneal Nerve?

A

L6-L7 (S1)

20
Q

What muscles are innervated by the Common Peroneal Nerve?

Hock flexors, digit extensors

A

Peroneus longus
Lateral digital extensor
Long digital extensor
Cranial tibial

CP Nerve is cranial brr.of Sciatic Nerve on lateral aspect of leg

21
Q

Spinal cord origin of the Ulnar Nerve?

A

C8-T2

22
Q

What muscles are innervated by the Ulnar Nerve?

Carpus and digit flexors

A

Flexor carpi ulnaris
Deep digital flexor

sensory innervation to lateral surface of metacarpus and 5th digit

23
Q

Spinal cord origin of Tibial Nerve?

A

(L6) L7-S1

24
Q

What muscles are innervated by the Tibial Nerve?

Hock extenders, digit flexors

A

Gastrocnemius
Popliteus
Deep digital flexor
Superficial digital flexor

Tibial n.provides caudal/plantar innervation of distal pelvic limb, esp. sensation over plantar surface of paw

25
Q

Spinal cord origin of Pelvic Nerve?

A

S1-S3

26
Q

What muscles are innervated by the Pelvic Nerve?

A

Smooth muscle of the bladder and rectum

SAM (8 decks)

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