NB 2-2 T

Segregation wave: S2

Like NB 1-1, NB 2-2 is a segment-specific neuroblast that produces both neurons and glia. In the thoracic neuromeres the lineage includes one dorsal subperineural glial cell, which is at the same position as the NB 1-1 derived A-SPG in the abdominal segments. Thus, thoracic and abdominal A-SPG cells derive from different progenitors. The neuronal elements of the thoracic NB 2-2 lineage are two to three motoneurons (2-2M) and about ten interneurons (2-2I) in the ventral cortex. The 2-2M neurons are located close to the thoracic 1-1Ms neurons and their axons also project through the segmental nerve. Endplates can be seen at the ventral to ventrolateral muscle group (most likely at muscles VO1, VO2 and LO1; nomenclature according to Bate, 1993) .

Flybrain    Development    Neuroblast Lineage    NB 2-2t

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