antennal lobe glomerulus VP1 [FBbt_00003927]

antennal lobe glomerulus VP1

ID: FBbt_00003927

Ventro-posterior glomerulus of the adult antennal lobe. It is located dorsomedial to glomerulus VP3, dorsoposterior to glomerulus V. Three of these can be distinguished based on innervation patterns of sensory and projection neurons (Marin et al., 2020).

Discernible with Golgi impregnation or CoCl2 backfills (Stocker et al. 1990), but not with nc82/bruchtpilot immunolabelling, leading to it not being represented in antennal lobe maps (Laissue et al., 1999, Couto et al., 2005) or having its position changed (Chou et al., 2010; Yu et al., 2010). According to Chou et al (2010) and Yu et al (2010) glomerulus VP1 is located medially to glomerulus VP2. The VP1 glomerulus corresponds to the target region of the Ir40-expressing olfactory sensory neurons, corresponding to the 'column' (Silbering et al., 2011). Tanaka et al (2012) identifies a new glomerulus, VP4, as another target region of Ir40a-expressing olfactory sensory neurons, which is innervated by different projection neurons to VP1.