Nerves MD3 Flashcards
Brachial Plexus
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/856/584/q_image_thumb.png?1659501615)
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- Roots: C5 & C6, C7, C8 & T1
- Trunks: Superior, Middle, Inferior
- Divisions: Anterior (flexors), Posterior (extensors)
- Cords: Lateral, Posterior, Medial
- Branches: Musculocutaneous (lat), Median (lat & med), Ulnar (med), Axillary (post), Radial (post)
- also medial cutaneous nerve of arm & forearm (med)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/856/584/a_image_thumb.png?1659445622)
Axillary nn
- branch off posterior cord of brachial plexus
- C5 & C6
- shoulder abduction & shoulder sensation
- traverses quadrangular space
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/857/954/a_image_thumb.png?1659445623)
Radial nn
- branches off of posterior cord of brachial plexus
- runs under brachioradialis
- C5-T1
- extension (elbow, wrist, fingers)
sensation to back of hand (radial/lateral aspect of fingers 1-4)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/858/726/a_image_thumb.png?1659445624)
Musculocutaneous nn
branch off lateral cord of brachial plexus
- C5-C6
- elbow flexion & chief supinator
- gives rise to lateral cutaneous nerve of forearm
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/859/270/a_image_thumb.png?1659445624)
Median nn
branch off lateral & medial cords of brachial plexus
- C5-T1
- wrist & digit flexion, chief pronator, hand sensation (primarily)
- motor of hand (LOAF): lumbricals 1&2, opponens pollicis, abductor pollicis brevis, flexor pollicis brevis
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/860/698/a_image_thumb.png?1659445624)
Ulnar nn
branch off of medial cord of brachial plexus
- C8 & T1
- hand intrinsics
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/862/097/a_image_thumb.png?1659445625)
Long Thoracic nn
- C5-C7 (mainly 6 & 7) roots of brachial plexus
- supplies serratus anterior
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/862/268/a_image_thumb.png?1659445625)
Suprascapular nn
- C5, C6 (5 mainly), branches off from superior trunk of brachial plexus
- supplies supra & infraspinatus
- passes through scapular notch under the transverse scapular ligament
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/862/313/a_image_thumb.png?1659445625)
Thoracodorsal nn
C6-C8 (mainly 6 & 7), branch off from posterior cord of brachial plexus
-supplies latissimus dorsi
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/862/634/a_image_thumb.png?1659445626)
Upper & Lower Subscapular nn
C5 & C6 (6 mainly)
- upper supplies only subscapularis
- lower supplies subscapularis & teres major
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/862/890/a_image_thumb.png?1659445626)
Medial cutaneous nerve of the forearm
- C8 & T1, branches off from medial cord of brachial plexus (axilla)
- supplies anteromedial skin of forearm up to wrist
![](https://s3.amazonaws.com/brainscape-prod/system/cm/127/863/861/a_image_thumb.png?1659445627)
Lateral Cutaneous Nerve of Forearm
from: musculocutaneous (C5, C6)
supplies skin of dorsolateral forearm
![](https://s3.amazonaws.com/brainscape-prod/system/cm/132/159/437/a_image_thumb.png?1659449686)
Recurrent Median nn
![](https://s3.amazonaws.com/brainscape-prod/system/cm/132/159/747/q_image_thumb.png?1659508249)
from: median nn
supplies the thenar muscles
Common Palmar Digital nn
![](https://s3.amazonaws.com/brainscape-prod/system/cm/132/160/174/q_image_thumb.png?1659508249)
from median nn (x 3) and ulnar nn (x 1)
supply lumbricals on adjacent sides of digits 2-4
![](https://s3.amazonaws.com/brainscape-prod/system/cm/132/160/174/a_image_thumb.png?1659449686)
Proper Digital nn
![](https://s3.amazonaws.com/brainscape-prod/system/cm/132/162/707/q_image_thumb.png?1659508249)
branches off of common palmar digital nn,
runs on both sides of phalanges, supplies skin of distal phalanges?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/132/162/707/a_image_thumb.png?1659449687)
Dorsal Digital nn
![](https://s3.amazonaws.com/brainscape-prod/system/cm/132/163/599/q_image_thumb.png?1659508249)
from radial nn, and some ulnar nn
supplies skin on dorsal surface of proximal & middle phalanges