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The Peripheral Nervous System > Spinal Nerves Plexuses > Flashcards

Spinal Nerves Plexuses Flashcards

0
Q

Phrenic nerve innervates?

A

Diaphragm (motor & sensory)

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1
Q

Cervical plexus is formed by what?

A

Ventral Rami: C1-4

Phrenic nerve

Accessory nerve

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2
Q

Accessory nerve innervates?

A

Sternocleidomastoid & trapezius muscles.

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3
Q

Brachial plexus is formed by:

A

Ventral rami: C5-8 & T1

Axillary nerve

Musculocutaneous nerve

Median nerve

Ulnar nerve

Radial nerve

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4
Q

Axillary nerve innervates?

A

Deltoid muscle (shoulder abduction)

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5
Q

Musculocutaneous nerve innervates?

A

Elbow flexors (biceps brachii & brachialis)

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6
Q

Median nerve innervates?

A

Most anterior forearm muscles (wrist flexion & abduction)
(Flexor carpi radialis)

= carpal tunnel syndrome

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7
Q

Ulnar nerve innervates?

A

A few anterior forearm muscles (wrist flexors & adduction)
(Flexor carpi ulnaris & flexor digitorum profundus)

= funny bone

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8
Q

Radial nerve innervates?

A

All extensors of the upper limb.

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9
Q

What is the largest branch of the brachial plexus?

A

Radial nerve

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10
Q

What are the 4 major branches of the brachial plexus?

A
  1. Roots
  2. Trunks
  3. Divisions
  4. Cords
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11
Q

Lumbar plexus is formed by what?

A

Ventral rami: L1-4
Femoral nerve
Obdurator nerve

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12
Q

Femoral nerve innervates?

A

Anterior thigh musculature (iliacus, sartorious, quadriceps).

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13
Q

Obturator nerve innervates?

A

Adductor muscles of the thigh (adductor longus & gracilis).

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14
Q

What is the largest nerve of the lumbar plexus?

A

Femoral nerve

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15
Q

The femoral nerve branches to form what?

A

Saphenous nerve

Supplying skin over medial surface of thigh

16
Q

What forms the sacral plexus?

A

Ventral rami: L4-S-4

Sciatic nerve

17
Q

What does the sciatic nerve form?

A

Tibial nerve

Common peroneal nerve

18
Q

What does the tibial nerve innervate?

A

Muscles of the back of the leg (hamstrings, gastroc, and soleus)

19
Q

The tibial nerve branches into what?

A

The plantar nerve

For the foot

20
Q

The common peroneal nerve branches into what?

A

Deep peroneal nerve

Superficial peroneal nerve

21
Q

The deep peroneal nerve innervates what?

A

Tibial is anterior

22
Q

The superficial peroneal nerve innervates what?

A

Peroneous longus

23
Q

What is the thickest and longest nerve in the body?

A

Sciatic nerve

The Peripheral Nervous System (11 decks)

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