A&P Lab 4 (Spinal Nerves)

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What spinal segment corresponds with the Conus Medullaris?

L1

What spinal segment corresponds with the cauda equina?

L2 - S5

What spinal segment corresponds with the Femoral nerve?

L2-L4

What spinal segment corresponds with the Obturator nerve?

L2-L4

What spinal segment corresponds with the Sciatic nerve?

L4-S3

What plexus does the Femoral nerve belong to?

Lumbar

What plexus does the Obturator nerve belong to?

Lumbar

Musculocutaneous Nerve: Innervated muscle, and sensory region.

1. Biceps brachii, brachialis 2. Skin of lateral forearm

Axillary Nerve: Innervated muscle, and sensory region.

1. Deltoid, shoulder joint 3. Skin of arm inferior to axilla

Phrenic Nerve: Innervated muscle, and sensory region.

1. Diaphragm 2. None

What 2 nerves belong to Lumbar Plexus?

1. Femoral 2. Obturator

Median Nerve: Innervated muscle, and sensory region.

1. Flexors of the wrist 2. Skin of lateral half of the palm, thumb, first 2 finger skin (lateral hand)

Ulnar Nerve: Innervated muscle, and sensory region.

1. Medial flexors of the wrist 2. Skin of medial half of palm, 4th and 5th digits (medial hand)

Radial Nerve: Innervated muscle, and sensory region.

1. Muscles of posterior arm (wrist extensors) 2. Skin of posterior upper limb

What 5 nerves belong to Brachial Plexus?

1. Musculo-cutaneous 2. Median 3. Ulnar 4. Axillary 5. Radial

Obturator Nerve: Innervated muscle, and sensory region.

1. Thigh adductors 2. Small patch of medial thigh

Femoral Nerve: Innervated muscle, and sensory region.

1. Thigh flexors 2. Anteromedial skin of thigh and leg

Wha 2 components divide the Sciatic nerve?

1. Tibial Branch 2. Fibular Branch

What plexus does the Axillary nerve belong to?

Brachial

What plexus does the Median nerve belong to?

Brachial

What plexus does the Musculo-cutaneous nerve belong to?

Brachial

What plexus does the Radial nerve belong to?

Brachial

What plexus does the Ulnar nerve belong to?

Brachial

What spinal segment corresponds with the Phrenic nerve?

C3 - C5

What spinal segment corresponds with the Axillary nerve?

C5, C6

What spinal segment corresponds with the Musculocutaneous nerve?

C5, C6, C7

What spinal segment corresponds with the Radial nerve?

C5-T1

What spinal segment corresponds with the Median nerve?

C6 - T1

What spinal segment corresponds with the Ulnar nerve?

C8, T1

What plexus does the Phrenic nerve belong to?

Cervical

What nerves belong to the cervical plexus?

Phrenic nerve

What plexus does the Sciatic nerve belong to?

Sacral

What nerves belong to Sacral Plexus?

Sciatic nerve

Sciatic Nerve: Innervated muscle, and sensory region.

1. Hamstrings 2. Skin of posterior calf (tibial branch), skin of anterior shin (fibular branch)


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