Summary of Brachial plexus
Flashcards on Brachial plexus
The five roots of the brachial plexus are formed by the spinal nerves.
Questions on Brachial plexus
A 25-year-old man complains that he has noticed increased difficulty moving his right arm that started when he took up volleyball. He also sometimes feels pain in his right shoulder (posterior aspect). Upon visual inspection of his back, you notice that the muscles above and below the spine of the scapula are atrophied. When you perform a motor exam, he has weak abduction and external rotation of the right arm. The nerve that is most likely damaged arises from which of the following segments of the brachial plexus?