Nysten law

Ny·sten law

(nē-stawn'),
rigor mortis affects first the muscles of the head and spreads toward the feet.

Nysten law

(nē-sten′)
[Pierre Hubert Nysten, Fr. pediatrician, 1774–1817]
A law stating that rigor mortis begins with the muscles of mastication and progresses from the head down the body, affecting the legs and feet last.

Nysten,

Pierre Hubert, French physician, 1771-1818.
Nysten law - rigor mortis affects first the muscles of the head and spreads toward the feet.