The term causalgia (Greek: kausis – burning, algos – pain) was introduced by Silas Weir Mitchell in 1864. It was used to describe a rare syndrome that followed a minority of partial peripheral nerve injuries in the American civil war. Triad: burning pain, autonomic dysfunction and trophic changes.
In 1864 Lasègue described the signs of developing low back pain while straightening the knee when the leg has already been lifted. In 1880 Serbian doctor Laza Lazarević described the straight leg raise test as it is used today, so the sign is often named Lazarević's sign in Serbia and some other countries.
(Hughlings) Jackson’s syndrome: CN X, XI & XII palsy First described in 1864 with unilateral paralysis of the soft palate, larynx, sternocleidomastoid, trapezius, and tongue.