Figure 1 - Development of the Mushroom Bodies

Figure 1 - Development of the Mushroom Bodies

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Figure 1
Development of the Mushroom Bodies
(A) Embryonic MB primordium. Lateral image of embryonic brain hemisphere at stage 17 showing the four MB neuroblasts (MB-NBs) that are located at the anterior end (in neuraxis) of the brain and give rise to the embryonic Kenyon cells (KCs). Axonal tracts of the peduncle and two orthogonal lobes are pioneered by this stage. Bar, 10 µm. (B) Larval MB. The larval MB structure is basically an extension of the embryonic one with increasing number of Kenyon cells (KCs) and their axons. The peduncle (ped) split into the dorsal (a^L) and medial (b^L) lobes. cx, calyx. Third instar. Bar, 50 µm. (C) Late pupal and adult MBs. After massive reorganization during the first half of the pupal stage, two dorsal (a and a') and three medial lobes (b, b' and g) are formed. Together with heel (h), these adult type structures can be classified into three axonal projection groups (a/b, a'/b' and g/heel), which are indicated with different shadings in the figure. Bar, 60 µm. Adapted from refs. 8-11.

Flybrain Development Genetic Control of MB Development Figure 1

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