A1-7 DA1 motor neuron [FBbt_00110220]

Motor neuron that innervates the internal dorsal acute muscle 1 of larval abdominal segments A1 to A7. Its dendritic arborization occupies the lateral domain of the ventral nerve cord neuropil. It exits the ventral nerve cord via the anterior root of the intersegmental nerve and innervates the DA1 muscle with type Ib boutons (Landgraf et al., 1997; Hoang and Chiba, 2001). By embryonic stage 16, it has a short contralaterally projecting neurite extending into the posterior commissure. It receives input from the contra- and ipsilateral larval A27h neuron. 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. These neurons were identified in a EM reconstruction of a volume that includes the posterior half of abdominal segment 2 and abdominal segment 3, of a 12-24h old first instar larva. The number of connections was estimated from the publication figures. The number of input synapses was the following (number in brackets ipsilateral/contralateral): from A27h (10/10) (Schneider-Mizell et al., 2016).

Open A1-7 DA1 motor neuron in VFB

Example Images

A1-7 DA1 motor neuron A1-7 DA1 motor neuron A1-7 DA1 motor neuron A1-7 DA1 motor neuron

VFB Term Json

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