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CELL TYPE LINEAGE LOCATION NEUROTRANSMITTER ASSOCIATED GLIA

M2L

M2R

Pharyngeal motor neuron

AB.araapappa

AB.araappppa

Pharynx posterior bulb

Possibly Ach. (Duerr J. et al, 1994).

Express the FMRFamide-related neuropeptides (FaRP), FLP-18 and FLP-21 (Rogers C. et al, 2003).

Express neuropeptide-like proteins NLP-3 and NLP-13 (Nathoo A. et al 2001).

None
DESCRIPTION

M2L/R are a pair of unipolar neurons with processes which run anteriorly in the subventral nerve cords. After making synapses on pm5, these processes travel past the pharyngeal nerve ring without changing course. They then travel dorsally piercing through pm4 while making motor synapses on pm4 along this course. These are one of the two pharyngeal neuron pairs (the other, M3) that do not make their dorsal turn within the nerve ring but more anteriorly within the muscle cells. They terminate in gap junctions to each other when they meet on the dorsal side. (Albertson D. J. and Thomson J. N., 1976).

Functions: Unknown or redundant (Avery L, and Thomas J. H., 1997, Steciuk M. et al, 2002).

Receptor expression: Unknown.

See EM sections of M2 neuron in Handbook-Alimentary System/Pharyngeal Neurons .






See pRIC-19::GFP expression in M2 neurons in Moerck C. et al., Dev. Biol. 260 (2003) 158-175