• A nerve network originating from C5 to T1 that supplies cutaneous and muscular innervation to the arm and hand.
  NCI
  U.S. National Cancer Institute, 2021
• A network of nerves that are rooted at the cervical spine and provide sensation and movement to the shoulder and arm.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• A network of nerves that sends signals from the spine to the arm and hand.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• The large network of nerve fibers which distributes the innervation of the upper extremity. The brachial plexus extends from the neck into the axilla. In humans, the nerves of the plexus usually originate from the lower cervical and the first thoracic spinal cord segments (C5-C8 and T1), but variations are not uncommon.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• The brachial plexus (plexus brachialis) is a somatic nerve plexus formed by intercommunications among the ventral rami (roots) of the lower 4 cervical nerves (C5-C8) and the first thoracic nerve (T1). The plexus, depicted in the images below, is responsible for the motor innervation of all of the muscles of the upper extremity, with the...
  Medscape
  WebMD, 2025