From neuro- +‎ physiology.

neurophysiology (usually uncountable, plural neurophysiologies)

1. (physiology, neuroscience) The branch of physiology that deals with the nervous system.
   • 1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co., page 17:

     This relationship between language and sexuality, oral and genital, has been elaborated in recent research in neurophysiology.