Central and peripheral neurones involved in oxygen perception in the pulmonate snail Lymnaea stagnalis (Mollusca, Gastropoda)

Respiratory behavior in the pond snail Lynmaea stagnalis

“…The results we described here are thus in direct conflict with those of Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988. In addition to the effects of central neurons on pneumostome movements described above, these authors showed that mechanical stimulation of the mantle edge, pneumostome area, and wall of the lung cavity had excitatory effects on right parietal B group (R.P.B group), visceral F group (V.F group) and visceral G group (V.G group) neurons (Janse et al 1985).…”

“…We have demonstrated here (Fig. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4.…”

“…The effects of changes in external pOz on the central neurons of Lymnaea stagnalis were described earlier by Janse et al (1985). These authors and van der Wilt et al (1987) presented evidence that V.D.4 and visceral E cells were involved in pneumostome opening movements.…”

Respiratory behavior in the pond snail Lynmaea stagnalis

“…The results we described here are thus in direct conflict with those of Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988. In addition to the effects of central neurons on pneumostome movements described above, these authors showed that mechanical stimulation of the mantle edge, pneumostome area, and wall of the lung cavity had excitatory effects on right parietal B group (R.P.B group), visceral F group (V.F group) and visceral G group (V.G group) neurons (Janse et al 1985).…”

“…We have demonstrated here (Fig. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4.…”

“…The effects of changes in external pOz on the central neurons of Lymnaea stagnalis were described earlier by Janse et al (1985). These authors and van der Wilt et al (1987) presented evidence that V.D.4 and visceral E cells were involved in pneumostome opening movements.…”

Identification of CO2Chemoreceptors inHelix pomatia

“…Hypoxia also promotes pneumostomal opening in the aquatic snail Lymnea. stagnalis, apparently through mantle affer-ents (Janse et al, 1985). We believe that CO 2 chemoreceptors contribute information to a central pattern generator that integrates many afferents and determines a final pattern of pneumostomal activity.…”

Nerve growth factor (NGF) induces sprouting of specific neurons of the snail, Lymnaea stagnalis

“…198 1 ); L.Pe.D. I , the giant serotonergx neuron; although the function of this neuron is unknown, by analogy with its homologue in the right pedal ganglion, it may serve an interneuronal role (Kyriakides, McCrohan, Slade, Syed, and Winlow, 1989): V.D.4 (also known as the Visceral White Interneuron, a cell with extensive follower cells in the visceral and parietal ganglia: Janse, van der Wilt, van der Plas, and van der Roest, 1985;Benjamin, 1984). Neurosecretory cells: cerebral light-green cells (the source of growth hormone; de Vlieger and Lodder, 1985): caudo-dorsal cells (source of egg-laying hormone: de Vlieger, Kits, ter Maat.…”

Respiratory behavior in the pond snail Lynmaea stagnalis

“…The results we described here are thus in direct conflict with those of Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988. In addition to the effects of central neurons on pneumostome movements described above, these authors showed that mechanical stimulation of the mantle edge, pneumostome area, and wall of the lung cavity had excitatory effects on right parietal B group (R.P.B group), visceral F group (V.F group) and visceral G group (V.G group) neurons (Janse et al 1985).…”

“…We have demonstrated here (Fig. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4.…”

“…The effects of changes in external pOz on the central neurons of Lymnaea stagnalis were described earlier by Janse et al (1985). These authors and van der Wilt et al (1987) presented evidence that V.D.4 and visceral E cells were involved in pneumostome opening movements.…”

Identification of CO2Chemoreceptors inHelix pomatia

“…Hypoxia also promotes pneumostomal opening in the aquatic snail Lymnea. stagnalis, apparently through mantle affer-ents (Janse et al, 1985). We believe that CO 2 chemoreceptors contribute information to a central pattern generator that integrates many afferents and determines a final pattern of pneumostomal activity.…”

Nerve growth factor (NGF) induces sprouting of specific neurons of the snail, Lymnaea stagnalis

“…198 1 ); L.Pe.D. I , the giant serotonergx neuron; although the function of this neuron is unknown, by analogy with its homologue in the right pedal ganglion, it may serve an interneuronal role (Kyriakides, McCrohan, Slade, Syed, and Winlow, 1989): V.D.4 (also known as the Visceral White Interneuron, a cell with extensive follower cells in the visceral and parietal ganglia: Janse, van der Wilt, van der Plas, and van der Roest, 1985;Benjamin, 1984). Neurosecretory cells: cerebral light-green cells (the source of growth hormone; de Vlieger and Lodder, 1985): caudo-dorsal cells (source of egg-laying hormone: de Vlieger, Kits, ter Maat.…”

Respiratory behavior in the pond snail Lynmaea stagnalis

“…The results we described here are thus in direct conflict with those of Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988. In addition to the effects of central neurons on pneumostome movements described above, these authors showed that mechanical stimulation of the mantle edge, pneumostome area, and wall of the lung cavity had excitatory effects on right parietal B group (R.P.B group), visceral F group (V.F group) and visceral G group (V.G group) neurons (Janse et al 1985).…”

“…We have demonstrated here (Fig. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4. Furthermore, all the cell types described by Janse et al (1985) and van der Wilt et al (1987van der Wilt et al ( , 1988 as receiving excitation during the mechanical stimulation of the pneumostome, lung cavity, and mantle area have been shown here to receive excitation from V.D.4.…”

“…The effects of changes in external pOz on the central neurons of Lymnaea stagnalis were described earlier by Janse et al (1985). These authors and van der Wilt et al (1987) presented evidence that V.D.4 and visceral E cells were involved in pneumostome opening movements.…”

Identification of CO2Chemoreceptors inHelix pomatia

“…Hypoxia also promotes pneumostomal opening in the aquatic snail Lymnea. stagnalis, apparently through mantle affer-ents (Janse et al, 1985). We believe that CO 2 chemoreceptors contribute information to a central pattern generator that integrates many afferents and determines a final pattern of pneumostomal activity.…”

Nerve growth factor (NGF) induces sprouting of specific neurons of the snail, Lymnaea stagnalis

“…198 1 ); L.Pe.D. I , the giant serotonergx neuron; although the function of this neuron is unknown, by analogy with its homologue in the right pedal ganglion, it may serve an interneuronal role (Kyriakides, McCrohan, Slade, Syed, and Winlow, 1989): V.D.4 (also known as the Visceral White Interneuron, a cell with extensive follower cells in the visceral and parietal ganglia: Janse, van der Wilt, van der Plas, and van der Roest, 1985;Benjamin, 1984). Neurosecretory cells: cerebral light-green cells (the source of growth hormone; de Vlieger and Lodder, 1985): caudo-dorsal cells (source of egg-laying hormone: de Vlieger, Kits, ter Maat.…”