The other bullet entered the right upper arm and tracked down a few centimetres under the skin, before exiting the arm and grazing the skin of the chest.

BBC: London

So when the reinnervated skin (on the chest or shoulder, perhaps) is touched, it registers to the patient as a sensation in the missing limb.

ECONOMIST: Rewiring nerves

You'll need to have a skin test for tuberculosis, a chest X-ray and a test for hepatitis B before taking infliximab.

CNN: Ulcerative colitis

By rewiring a missing arm's motor nerves to muscles in the remaining stump, shoulder or chest, for example, and rewiring the arm's sensory nerves to the skin in these regions, a channel is opened to the part of the brain that once controlled the missing limb.

ECONOMIST: Rewiring nerves