The<unk>  <unk> is Latin for "little rein") act as regulators of key central nervous system neurotransmitters, connecting the forebrain and midbrain within the epithalamus. Although they were predominantly studied for their demonstration of asymmetrical brain development and function, in recent years many scientists have begun to examine the<unk> 's role in motivation and behavior as it relates to an understanding of the physiology of addiction.
Habenular nuclei
Reticulotegmental nucleus
Lentiform nucleus
Tapetum lucidum
Globose nucleus
Fusiform body area
Corona radiata 
Alpinia nigra