Which of the following nerves does not arise from the brachial plexus? phrenic median radial ulnar QUESTION 47 Which statement accurately describes spinal nerves? Odd-numbered spinal nerves are sensory and even-numbered spinal nerves are motor. All spinal nerves are sensory nerves. Most spinal nerves are motor nerves. Spinal nerves are central axons contained within the vertebral canal. Each spinal nerve is mixed in that it contains some sensory axons and some motor axons. QUESTION 48 Where is an epidural anesthetic injected? between cutaneous membrane & bone between dural sheath & bone between dura mater & arachnoid villi between dural sheath & spinal cord