heart - cardiology, brain - ?

NEUROLOGY
WordClue
TEETHcardiology - heart, stomatology - ?
LIVERcardiology - heart, hepatology - ?
HEARTneurology - brain, cardiology - ?
BRAINcardiology - heart, neurology - ?
MINDhead, brain
MINDbrain, psyche
MINDbrain, reason
MINDreason, brain
STEMbrain or onion
MINDbrain
HEADmind, brain
HEARTstomatology - teeth, cardiology - ?
LIVERneurology - brain, hepatology - ?
TEETHneurology - brain, stomatology - ?
HEARThepatology - liver, cardiology - ?
MEDALPurple Heart
HARNSbrain
REASONmind, brain
HEPATOLOGYheart - cardiology, liver - ?
BRAVERYheart