Mushroom Body
Copyright S Sarah Farivar-Hayes, 2022.

Schematic of the MB in the brain. Schematic of the locust brain depicting the lobes of the MB neuropil. Left hemisphere MB is shaded in gray, while on the right MB the divisions are show. The calyx is the area where the PN axons connect to KC dendrites. The pedunculus (P) is made up of the axons of the KC as they project to the Alpha and Beta lobes, to connect to the dendrites of the extrinsic cells. (Figure adapted from Neurobiology of an Insect Brain by Malcolm Burrows.)

The Mushroom Body in the Brain Composite image of a full MB reconstruction in 3D (red structure on the left) with KC innervation of its calyx (green), and MB calyx in 3D (yellow structure on right) with PN innervation (red cell on right), within the full brain (outlined in white).

Divisions of the Mushroom Body (MB) Three-dimensional Imaris reconstruction of the locust calyx showing divisions, depicted in three views. From left to right, facing out of page, are the ventral, anterior and lateral views (or front, top and side views respectively). The outer-calyx (OC) is depicted in yellow, the mid-calyx (MC) in orange, the inner-calyx (IC) in green, and the accessory calyx in purple. The dorsoventral axis is depicted by 'D' at the dorsal end and 'V' at the ventral end. The mediolateral axis is depicted by 'M' and 'L'. The anteroposterior axis is depicted by 'A' and 'P'.

MB Beta Lobe Three-dimensional Imaris reconstruction of the beta lobe of the MB, depicting its two zones from two different aspects. The zones are defined according to the type of KC axon that innervate them.