|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 1. Schematic of the stomatogastric nervous system of Cancer borealis
and recordings of the spontaneously active pyloric rhythm. (Top) A schematic
of the stomatogastric nervous system, which is composed of the paired
commissural ganglia (CoGs) and unpaired esophageal (OG) and stomatogastric
(STG) ganglia, plus their connecting nerves and a subset of peripheral nerves.
Projection neurons from the CoGs innervate the STG and influence the pyloric
and gastric mill rhythms. The axons of a subset of these projection neurons
are illustrated projecting through the nerves (ions, sons, stn) that
connect these ganglia. The axons projecting through the dorsal ventricular
nerve (dvn) originate from STG motor neurons and innervate identified
pyloric and/or gastric mill muscles. (Bottom) Extracellular recordings of the
pyloric motor neurons during a spontaneously active pyloric rhythm in the
completely isolated stomatogastric nervous system. Each pyloric motor neuron
was identified on the basis of the identity of the recorded nerves, the
relative timing of the action potential bursts and the relative amplitude of
the recorded action potentials. In C. borealis, there are single
copies of the LP, IC and VD neurons, two copies of the PD neuron and five
copies of the PY neuron (Kilman and
Marder, 1996).
|
