LKnative - Radial nerve block

2 – Anatomy: The origin of the radial nerve

The radial nerve is a branch of the posterior cord. It typically contains nerve fibres from the ventral rami of the spinal nerve roots C6-T1

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Radial nerve (R), posterior cord (PC), superior trunk (ST), middle trunk (MT), inferior trunk (IT), ventral rami of spinal nerve roots C5-T1
The yellow colour of the radial nerve can be tracked backwards to the ventral rami