(Redirected from Ganglia)
This is a dorsal root ganglion (DRG) from a chicken embryo (around stage of day 7) after incubation overnight in NGF growth medium stained with anti-neurofilament antibody. You can see the axons growing out of the ganglion.
In
anatomy, a 'ganglion' ''(pl. ''ganglia'')'' is a
tissue mass, which is composed mainly of
somata and
dendritic structures, which often interconnect with each other to form a complex system of ganglia known as a
plexus. These structures provide relay points and intermediary connections between different neurological structures in the body, such as the
peripheral and
central nervous systems.
There are two major groups of ganglia:
dorsal root ganglia (also known as the spinal ganglia) and
autonomic ganglia. The former contains the cell bodies of
sensory (afferent) nerves and the latter contains the cell bodies of
autonomic nerves.
In the
autonomic nervous system, fibers from the
central nervous system to the ganglion are known as
preganglionic fibers, while those from the ganglion to the effector organ are called
postganglionic fibers.
See also
★
Dorsal root ganglion
★
Ganglion cell
★
Ganglion cyst
★
Nervous system
★
Neuron
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