Rohon-Beard cell
Encyclopedia
Rohona-Beard cells are specialized neuron
Neuron
A neuron is an electrically excitable cell that processes and transmits information by electrical and chemical signaling. Chemical signaling occurs via synapses, specialized connections with other cells. Neurons connect to each other to form networks. Neurons are the core components of the nervous...

s with mechanoreceptor
Mechanoreceptor
A mechanoreceptor is a sensory receptor that responds to mechanical pressure or distortion. There are four main types in the glabrous skin of humans: Pacinian corpuscles, Meissner's corpuscles, Merkel's discs, and Ruffini corpuscles...

 function occurring at the stage of embryonic development in the dorsal part of the spinal cord in fish and amphibians.

Rohona-Beard neurons are developing on the border between ectoderm epidermal (surface) and neuroectoderm, first in the order of receptor neurons.

In most species disappear in the course of ontogenetic development (eg in zebrafish during the first two days of development, at the larval to be, replaced by a dorsal root ganglion of spinal nerves) by apoptosis.

The biological sciences are the subject of research on apoptosis
Apoptosis
Apoptosis is the process of programmed cell death that may occur in multicellular organisms. Biochemical events lead to characteristic cell changes and death. These changes include blebbing, cell shrinkage, nuclear fragmentation, chromatin condensation, and chromosomal DNA fragmentation...

.

John Beard and Joseph Victor Rohon described them independently of each other.
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