A1-7 LL1 motor neuron [FBbt_00110235]
Motor neuron developing from the fifth ganglion mother cell that differentiates from neuroblast NB7-1. It innervates the internal lateral longitudinal muscle 1 of larval abdominal segments A1 to A7. Its dendritic arborization occupies the intermediate domain of the ventral nerve cord neuropil. It exits the ventral nerve cord via the anterior root of the intersegmental nerve and innervates the LL1 muscle with type Ib boutons (Landgraf et al., 1997; Hoang and Chiba, 2001). Its soma is found in the segment anterior to the muscle it innervates (Kohsaka et al., 2012). There is little or no published literature specifically on innervation in A1 and so where equivalent muscles are present between A1 and A2-7 (Landgraf et al., 1997; Schmid et al., 1999), we infer A1 motor neuron innervation patterns from those of A2-7. The LL1 motor neuron is likely to correspond to the U5 neuron. This is suggested by the cell body position and by extrapolating the observation that these neurons that extend their axons the furthest differentiate the earliest (personal communication by Matthias Landgraf - FBrf0221138).
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VFB Term Json
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