Suppressive control of the crustacean pyloric network by a pair of identified intemeurons. II. Modulation of neuronal properties

• Main Authors: Jean-rem Cazalets, Frbdkric Nagy, Maurice Moulins
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1990
• Subjects: Homarus gammarus
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.539.5998; http://stg.rutgers.edu/stgrefs/stg_library/Cazalets_Nagy_Moulins_1990a.pdf

A pair of identified neuromodulatory neurons, the pyloric suppressor (PS) neurons, can individually and strongly mod-ify the activity of the pyloric network in the stomatogastric nervous system of the lobster Homarus gammarus. The PS neurons are identified by the location of their somata in the inferior ventricular nerve, their axonal projections, and their effects on pyloric network activity in vitro. Discharge of a PS neuron evokes large EPSPs in the pyloric dilator (PD) neu-rons and a long-lasting cessation of rhythmic activity in the neurons that control movements of the pyloric filter: PD, lat-eral pyloric (LP), and pyloric (PY). This cessation of rhythmic activity can outlast by several 10s of seconds a brief dis-charge of PS lasting only a few seconds. The different neu-rons of the pyloric filter do not exhibit the same sensitivity to the suppressive effects of PS, with the LP neuron being