Assertion: gray matter's axon | /r/CapableOf | pass through brachial plexus
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text: For example, a motor neuron located in the anterior gray horn of the first thoracic segment of the spinal cord gives rise to an axon that passes through the anterior root of the first thoracic nerve, through the brachial plexus, travels down the arm and forearm in the ulnar nerve, and finally reaches the motor end plates on several muscle fibers of a small muscle of the hand – a total distance of about 90 centimeters (3 feet).