Figure 1: Diagram of the brachial plexus, its branches and the muscles which they supply. From Aids to the Examination of the Peripheral Nervous System Fifth Edition, by Michael O’Brien, 2010. Copyright 2020 by Saunders Ltd. Reprinted with permission. 

Figure 2: Diagram of the lumbosacral plexus, its branches and the muscles which they supply. From Aids to the Examination of the Peripheral Nervous System Fifth Edition, by Michael O’Brien, 2010. Copyright 2020 by Saunders Ltd. Reprinted with permission.