teeth - stomatology, brain - ?

NEUROLOGY
List of words for the clue teeth - stomatology, brain - ? from the crossword:
LIVER HEPATOLOGY HEART CARDIOLOGY STEM EEG LOBE CPU COGS GNASH PEA EEGS ENIAC IDEA FANGS SAW GAP PIA MOLARS
WordClue
GUMThe flesh around the teeth
HEADmind, brain
MINDbrain
STEMbrain or onion
BRAINstomatology - teeth, neurology - ?
HARNSbrain
HEARTstomatology - teeth, cardiology - ?
LIVERstomatology - teeth, hepatology - ?
TEETHneurology - brain, stomatology - ?
HELMETbrain bucket
REASONmind, brain
CARDIOLOGYteeth - stomatology, heart - ?
CONCUSSIONtraumatic brain injury
HEPATOLOGYteeth - stomatology, liver - ?
HIPPOCAMPUSpart of brain
STOMATOLOGYbrain - neurology, teeth - ?
ENCEPHALITISInflammation of the brain
HIPPIEteenager who imitated the beatniks
CARDIOLOGYteeth - stomatology, heart - ?