part of has fasciculating neuron projection innervates continuous with develops from adult mediolateral antennal lobe tract medial antennocommissural tract middle antennocerebral tract middle antennoglomerular tract VFB:FBbt_00003984 medial antennocerebral tract mlALT One smaller tract (ml4ALT) branches from the mlALT at the mushroom body peduncle, runs posteriorly through the peduncle to terminate in the mushroom body calyx. Some of the projection neurons that fasciculate with the mlALT send collateral branches to the posterior lateral protocerebrum (PLP) via the lateral section of the posterior lateral fascicle (PLF) and to the ring neuropil via the superior section of the PLF (Tanaka et al., 2012). mlAPT Tract that arises from the posterior dorsomedial antennal lobe and shares the same root with the medial antennal lobe tract (mALT) and transverse antennal lobe tract (tALT) (dorsomedial root). It connects the antennal lobe and the lateral horn directly, bypassing the mushroom body main calyx. It contains axons of antennal lobe projection neurons, some of which terminate in the lateral accessory calyx (Yagi et al., 2016). Neuronal fibers of the mlALT run together with the medial antennal lobe tract (mALT) and separate from it at the level of the ventrolateral surface of the fan-shaped body, turn laterally, run below the mushroom body pedunculus and project to the lateral horn. It demarcates the boundaries of the fan-shaped body (anterior region), lateral accessory lobe (posterior region), epaulette (superior region), inferior clamp (anterior-superior region) and mushroom body pedunculus (inferior region). It is formed by axons of the BAla1 (Alv1) lineage (Lovick et al., 2013; Wong et al., 2013). fly_anatomy.ontology FBbt:00003984 https://iiif.elifesciences.org/lax/44590%2Felife-44590-fig2-v2.tif/full/,1500/0/default.jpg mACT middle antenno-cerebral tract median antenno-cerebral tract medial antenno-cerebral tract adult medial antennal lobe tract adult lateral horn adult mushroom body lateral accessory calyx embryonic/larval mediolateral antennal lobe tract adult ALv1 lineage neuron adult antennal lobe tract adult cerebral ganglion