Journal of Neuroscience, Vol 1, 94-102, Copyright © 1981 by Society for Neuroscience
Embryonic development of identified neurons: origin and transformation of the H cell
CS Goodman, M Bate and NC Spitzer
We describe the origin and the transformation of a single neuron, the H
cell, which assumes two different roles during grasshopper embryogenesis.
The H cell originates from the single cell division of midline precursor 3
(MP3). In the metathoracic (T3) segment, the H cell first appears as one of
a pair of central pioneer fibers and later transforms into an unpaired
identified neuron. During the course of its transformation, the H cell
loses its original morphology and acquires new morphological and
physiological properties. The H cell acquires many of the same phenotypes
as the first progeny of the median neuroblast (MNB); the processes of the
first MNB progeny contact the soma of the H cell and these cells are
electrically coupled prior to the H cell transformation.