neu·ro·psy·chol·o·gy 
(nr′ō-sī-kŏlə-jē, nyr′-)
(nr′ō-sī-kŏlə-jē, nyr′-)n.
The branch of psychology that deals with the relationship between the nervous system and mental functions such as language, memory, and emotion.
neu′ro·psy′cho·logi·cal (-sī′kə-lŏjĭ-kəl) adj.
neu′ro·psy·cholo·gist n.