stomatology - teeth, neurology - ?

BRAIN
WordClue
GUMThe flesh around the teeth
OILcod-liver or mineral
HEADmind, brain
MINDbrain
STEMbrain or onion
HARNSbrain
HEARTstomatology - teeth, cardiology - ?
LIVERstomatology - teeth, hepatology - ?
TEETHneurology - brain, stomatology - ?
HELMETbrain bucket
REASONmind, brain
HEPATITISinflammation of the liver tissue
NEUROLOGYteeth - stomatology, brain - ?
CARDIOLOGYteeth - stomatology, heart - ?
CONCUSSIONtraumatic brain injury
HEPATOLOGYteeth - stomatology, liver - ?
HIPPOCAMPUSpart of brain
STOMATOLOGYbrain - neurology, teeth - ?
ENCEPHALITISInflammation of the brain
LIVERstomatology - teeth, hepatology - ?
ROCKstone