Electrically excitable nerve cell bodies in the central ganglia of two insect species Periplaneta americana and Schistocerca gregaria. Investigation of cell geometry and morphology by intracellular dye injection

Dorsal unpaired median neurons of the cockroach metathoracic ganglion

“…No close relationships were observed between the neuron morphology and electrical properties. The shapes of the spikes were similar to those recorded by Crossman et al (1971); with a duration of 2-4 ms and a deep after-hyperpolarization of 10-30 mV. We obtained somewhat smaller values for resting potentials of metathoracic DUM neurons than the 50-60 mV reported by Crossman et al, (1971).…”

Dorsal unpaired median neurons of the cockroach metathoracic ganglion

“…No close relationships were observed between the neuron morphology and electrical properties. The shapes of the spikes were similar to those recorded by Crossman et al (1971); with a duration of 2-4 ms and a deep after-hyperpolarization of 10-30 mV. We obtained somewhat smaller values for resting potentials of metathoracic DUM neurons than the 50-60 mV reported by Crossman et al, (1971).…”

Ion currents and spiking properties of identified subtypes of locust octopaminergic dorsal unpaired median neurons

“…Our in situ and in vitro comparisons showed that neither the backfill procedure nor the process of extraction and isolation of somata into primary cell culture impaired the physiological condition of the investigated cells. In addition, resting and action potentials resembled closely those from DUM neurons in semi‐intact animals or even locust embryos (Crossman et al ., 1971; Hoyle & Dagan, 1978; Goodman et al ., 1979; Goodman & Spitzer, 1981). In resting animals, action potentials were observed sporadically and probably driven by synaptic input (Hoyle & Dagan, 1978; Heitler & Goodman, 1978).…”

Signal Propagation inDrosophilaCentral Neurons

“…However, models of other invertebrate neurons (Edwards and Mulloney, 1984; Borst and Haag, 1996; Tobin et al, 2006; Peron et al, 2007) may not completely generalize to Drosophila neurons. For example, unitary synaptic events are visible in somatic recordings from Drosophila antennal lobe PNs, whereas somatic recordings from neurons in larger insects generally do not reveal unitary synaptic events (but see Crossman et al, 1971). We therefore sought to develop a model of the electrotonic structure of a Drosophila antennal lobe PN.…”

Dorsal unpaired median neurons of the cockroach metathoracic ganglion

“…No close relationships were observed between the neuron morphology and electrical properties. The shapes of the spikes were similar to those recorded by Crossman et al (1971); with a duration of 2-4 ms and a deep after-hyperpolarization of 10-30 mV. We obtained somewhat smaller values for resting potentials of metathoracic DUM neurons than the 50-60 mV reported by Crossman et al, (1971).…”

Ion currents and spiking properties of identified subtypes of locust octopaminergic dorsal unpaired median neurons

“…Our in situ and in vitro comparisons showed that neither the backfill procedure nor the process of extraction and isolation of somata into primary cell culture impaired the physiological condition of the investigated cells. In addition, resting and action potentials resembled closely those from DUM neurons in semi‐intact animals or even locust embryos (Crossman et al ., 1971; Hoyle & Dagan, 1978; Goodman et al ., 1979; Goodman & Spitzer, 1981). In resting animals, action potentials were observed sporadically and probably driven by synaptic input (Hoyle & Dagan, 1978; Heitler & Goodman, 1978).…”

Signal Propagation inDrosophilaCentral Neurons

“…However, models of other invertebrate neurons (Edwards and Mulloney, 1984; Borst and Haag, 1996; Tobin et al, 2006; Peron et al, 2007) may not completely generalize to Drosophila neurons. For example, unitary synaptic events are visible in somatic recordings from Drosophila antennal lobe PNs, whereas somatic recordings from neurons in larger insects generally do not reveal unitary synaptic events (but see Crossman et al, 1971). We therefore sought to develop a model of the electrotonic structure of a Drosophila antennal lobe PN.…”

Dorsal unpaired median neurons of the cockroach metathoracic ganglion

“…No close relationships were observed between the neuron morphology and electrical properties. The shapes of the spikes were similar to those recorded by Crossman et al (1971); with a duration of 2-4 ms and a deep after-hyperpolarization of 10-30 mV. We obtained somewhat smaller values for resting potentials of metathoracic DUM neurons than the 50-60 mV reported by Crossman et al, (1971).…”

Ion currents and spiking properties of identified subtypes of locust octopaminergic dorsal unpaired median neurons

“…Our in situ and in vitro comparisons showed that neither the backfill procedure nor the process of extraction and isolation of somata into primary cell culture impaired the physiological condition of the investigated cells. In addition, resting and action potentials resembled closely those from DUM neurons in semi‐intact animals or even locust embryos (Crossman et al ., 1971; Hoyle & Dagan, 1978; Goodman et al ., 1979; Goodman & Spitzer, 1981). In resting animals, action potentials were observed sporadically and probably driven by synaptic input (Hoyle & Dagan, 1978; Heitler & Goodman, 1978).…”

Signal Propagation inDrosophilaCentral Neurons

“…However, models of other invertebrate neurons (Edwards and Mulloney, 1984; Borst and Haag, 1996; Tobin et al, 2006; Peron et al, 2007) may not completely generalize to Drosophila neurons. For example, unitary synaptic events are visible in somatic recordings from Drosophila antennal lobe PNs, whereas somatic recordings from neurons in larger insects generally do not reveal unitary synaptic events (but see Crossman et al, 1971). We therefore sought to develop a model of the electrotonic structure of a Drosophila antennal lobe PN.…”