![]() Projection view of a subset of dopaminergic neurons in the Protocerebral Posterior Lateral (PPL) 1 cluster. ![]() Image constructed by Wolf Huetteroth from confocal stacks collected by Shamik DasGupta.Ī. All three lobes are shown in the right hand MB whereas the γ lobe (magenta) has been removed in the left hand MB to reveal the position of the α´β´ (green) and αβ (red) lobes. The γ neurons send a single unbranched axon horizontally in the γ lobe. Similarly, each neuron in the α´β´ lobe bifurcates and sends one axon branch to the α´ lobe and one to the β´ lobe. Each Kenyon cell that contributes to the αβ subdivision bifurcates and sends one axon branch vertically to the α lobe and one horizontally to the β lobe. The approximately 2,500 Kenyon cells in each MB are roughly subdivided into three morphologically distinct groups based on the bundling of their projections in the region of the MB called the lobes. ![]() Transformed information is then carried on the axons of projection neurons (blue) to the MB neuron dendrites in the calyx and to poorly characterized neurons in the lateral horn. Olfactory information enters the brain through axons of olfactory sensory neurons that synapse in the antennal lobes. ![]()
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