title: Discovery of the first human stereotactic instrument.
abstract: It has been uncovered that the first human stereotactic instrument was designed around 1918, but was never put to human use. It was designed after the Horsley-Clarke animal apparatus by an engineer, Aubrey Mussen. The history surrounding that historical event is revealed in a series of letters between the engineer and his son some years later.
mesh_terms: D049673:History, 20th Century; D013238:Stereotaxic Techniques / Q000266:history*; D014481:United States