Table 1.

Nomenclature of 5-HT neuron clusters according to the location of somata compared with previous studies

5-HT cluster	Location	Vallés and White (1988)	Sitaraman et al. (2012)
ALP	Anterior lateral protocerebrum	—	ALP
AMP	Anterior medial protocerebrum	—	AMP
ADMP	Anterior dorsomedial protocerebrum	—	—
LP	Lateral protocerebrum	LP2a,b	LP2
SEL	Lateral subesophageal ganglion	SE1 and SE2	SE1 and SE2
SEM	Medial subesophageal ganglion	SE3	SE3
PLP	Posterior lateral protocerebrum	LP1	PLP
PMPD	Posterior medial protocerebrum, dorsal	SP1	PMP
PMPM	Posterior medial protocerebrum, medial	SP2	PMP
PMPV	Posterior medial protocerebrum, ventral	IP	PMP