larval A1-7-innervating DA2 motor neuron [FBbt_00002311]

Larval DO1 motor neuron that innervates a muscle of segments A1-7. Its dendritic arborization occupies the lateral and intermediate domains of the ventral nerve cord neuropil. It exits the ventral nerve cord via the anterior root of the intersegmental nerve and innervates the DA2 muscle with type Ib boutons (Landgraf et al., 1997; Hoang and Chiba, 2001). The muscle it innervates is one segment posterior to its soma (Zarin and Labrador, 2019).
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larval A1-7-innervating DA2 motor neuron

ID: FBbt_00002311

Larva Motor neuron lineage 3 NB7-1 primary neuron

Larval DO1 motor neuron that innervates a muscle of segments A1-7. Its dendritic arborization occupies the lateral and intermediate domains of the ventral nerve cord neuropil. It exits the ventral nerve cord via the anterior root of the intersegmental nerve and innervates the DA2 muscle with type Ib boutons (Landgraf et al., 1997; Hoang and Chiba, 2001). The muscle it innervates is one segment posterior to its soma (Zarin and Labrador, 2019).

This motor neuron is an exception to the class of motorneurons that innervate the internal dorsal muscles whose dendrites occupy the lateral neuropil; it has dendrites in the intermediate and lateral regions (Mauss et al., 2009). Previously thought to correspond to the U2 neuron based on personal communication from Matthias Landgraf - FBrf0221138, but shown to be U3 by Meng et al. (2019).

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## Classification

Relationships

Alternative Names

Synonym Scope Reference
MN-DA2 neuron exact synonym Landgraf et al., 1997
MN2-Ib exact synonym Hoang and Chiba, 2001
A1-7 U3 motor neuron exact synonym Meng et al., 2019
abdominal A1-7 DA2 motor neuron exact synonym