A&P Lab 4 (Spinal Nerves)
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)
