Relevant bibliographies by topics / Leech ganglion neurons

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Leech ganglion neurons'

Author: Grafiati
Published: 14 March 2023
Last updated: 31 July 2025

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Journal articles on the topic "Leech ganglion neurons"

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Becker, T. S., G. Bothe, A. J. Berliner, and E. R. Macagno. "Identified central neurons convey a mitogenic signal from a peripheral target to the CNS." Development 122, no. 8 (1996): 2331–37. http://dx.doi.org/10.1242/dev.122.8.2331.

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Regulation of central neurogenesis by a peripheral target has been previously demonstrated in the ventral nerve cord of the leech Hirudo medicinalis (Baptista, C. A., Gershon, T. R. and Macagno, E. R. (1990). Nature 346, 855–858) Specifically, innervation of the male genitalia by the fifth and sixth segmental ganglia (the sex ganglia) was shown to trigger the birth of several hundred central neurons (PIC neurons) in these ganglia. As reported here, removal of the target early during induction shows that PIC neurons can be independently induced in each side of a ganglion, indicating that the in
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Kazakova, T. A., A. I. Yusipovich, and G. V. Maksimov. "Investigation of Changes in Membrane Potential and Rhythmic Activity of the Retzius Neuron upon Stimulation of the Sensory P-Neuron." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 6 (93) (December 2020): 137–44. http://dx.doi.org/10.18698/1812-3368-2020-6-137-144.

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It was found that in "natural neural networks", ganglia of the nervous system of a leech, the frequency of rhythmic excitation (a series of nerve impulses, RE) of one neuron is modulated upon activation of other neurons. Changes in the electrophysiological characteristics of the leech Retzius cell in response to electrical stimulation of one of the sensory neurons (P-cells) were revealed. Registration of changes in the membrane potential of neurons, as well as electrical stimulation of the P-cell was carried out using microelectrodes introduced into the cells. It was found that during electric
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Szczupak, L., and W. B. Kristan. "Widespread mechanosensory activation of the serotonergic system of the medicinal leech." Journal of Neurophysiology 74, no. 6 (1995): 2614–24. http://dx.doi.org/10.1152/jn.1995.74.6.2614.

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The serotonergic system of the medicinal leech comprises a small number of iterated, identified neurons, of which the Retzius (Rz) neurons are major components. Activity in pressure mechanosensory (P) cells sufficient to elicit locomotory and defensive behaviors also excites Rz neurons. We characterized the interactions between P and Rz neurons within the ganglion and at different distances along the nerve cord. 2. Within a ganglion 1) P cells excited both Rz neurons, electrically close to the site of electrical coupling between the Rz neurons; 2) each of the four P cells had similar effects o
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Pastor, J., B. Soria, and C. Belmonte. "Properties of the nociceptive neurons of the leech segmental ganglion." Journal of Neurophysiology 75, no. 6 (1996): 2268–79. http://dx.doi.org/10.1152/jn.1996.75.6.2268.

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1. The electrical responses of nociceptive (N) lateral and N medial neurons of the leech segmental ganglion to mechanical, chemical, and thermal stimulation of the skin were studied in a superfused ganglion-body wall preparation. 2. Mechanical indentation of the skin > 10 mN evoked in both types of cells a sustained discharge of impulses; afterdischarge was often observed with suprathreshold stimulations. 3. Application to the cutaneous receptive area of 10-100 mM acetic acid or of NaCI crystals and solutions also elicited a firing response in N medial and N lateral cells. In contrast, caps
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Burgin, AM, and L. Szczupak. "Basal acetylcholine release in leech ganglia depolarizes neurons through receptors with a nicotinic binding site." Journal of Experimental Biology 201, no. 12 (1998): 1907–15. http://dx.doi.org/10.1242/jeb.201.12.1907.

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The response of Retzius neurons, the main neuronal source of serotonin in the leech nervous system, to cholinergic agonists has been extensively investigated. In this study, we analyzed the effects of inhibiting the acetylcholinesterase (AChE) activity in the leech midbody ganglion on the electrophysiological activity of the Retzius neurons. Bath application of neostigmine and physostigmine (0.1-100 &mgr;mol l-1) produced, after a delay, a strong depolarization of the Retzius neurons with a dose-dependent amplitude and latency. The amplitude of this depolarization increased as the extracel
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Opdyke, C. A., and R. L. Calabrese. "Outward currents in heart motor neurons of the medicinal leech." Journal of Neurophysiology 74, no. 6 (1995): 2524–37. http://dx.doi.org/10.1152/jn.1995.74.6.2524.

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1. Outward currents were studied in isolation in heart motor neurons in the medicinal leech, using the single-electrode voltage-clamp technique. The currents were divided into four distinct types on the basis of their time and voltage characteristics and sensitivity to external Ca2+ concentration. 2. The four types were a fast transient current, IKA; a slow transient current. IK1; a noninactivating current, IK2, all measured in a bathing solution in which Co2+ was substituted for Ca2+; and a calcium-sensitive current. IK1Cal which was revealed in a bathing solution containing normal levels of
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Szczupak, L., J. Edgar, ML Peralta, and WB Kristan. "Long-lasting depolarization of leech neurons mediated by receptors with a nicotinic binding site." Journal of Experimental Biology 201, no. 12 (1998): 1895–906. http://dx.doi.org/10.1242/jeb.201.12.1895.

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The serotonergic Retzius neurons of the leech midbody ganglia respond in a complex manner to pressure pulses of acetylcholine (ACh) applied onto their soma with a fast depolarization followed by a slower hyperpolarization and an additional delayed long-lasting depolarization. The delayed depolarization is the subject of the present study. The delayed depolarization could be elicited by long (>1 s) ACh pressure pulses or by short pulses (10 ms) of carbachol, nicotine and DMPP, but not by muscarinic agonists. It was inhibited by bath application of nicotine (10-100 micromol l-1), strychni
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Kuwada, John Y. "Pioneering and pathfinding by an identified neuron in the embryonic leech." Development 86, no. 1 (1985): 155–67. http://dx.doi.org/10.1242/dev.86.1.155.

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Numerous investigations of pathfinding by embryonic neurons, including many leech neurons, have demonstrated that pathfinding is precise. Neurons project the correct number of growth cones which grow to their target areas by making specific choices along the way. However, one leech mechanosensory neuron, the dorsal P (PD) neuron, is unusual in the sense that it initially projects an excessive number of growth cones. One of the growth cones will form the peripheral axon while the others are eliminated. This suggests that PD is one of the earliest neurons to project a peripheral axon, i.e., it m
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Becker, T., A. J. Berliner, M. N. Nitabach, W. B. Gan, and E. R. Macagno. "Target-induced neurogenesis in the leech CNS involves efferent projections to the target." Development 121, no. 2 (1995): 359–69. http://dx.doi.org/10.1242/dev.121.2.359.

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During a critical period in leech embryogenesis, the sex nerves that connect the 5th and 6th midbody ganglia (MG5 and MG6) to the primordium of the male sexual organ carry a spatially localized signal that induces the birth of several hundred neurons specific to these ganglia. We examined particular cellular elements (afferents, efferents, non-neuronal components) within these nerves as potential conveyors of the inductive signal. We show that axons of peripheral sensory neurons in the male genitalia travel along the sex nerves and into MG5 and MG6, but reach the CNS after the critical period
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Schmidt, J., and J. W. Deitmer. "Photoinactivation of the giant neuropil glial cells in the leech Hirudo medicinalis: effects on neuronal activity and synaptic transmission." Journal of Neurophysiology 76, no. 5 (1996): 2861–71. http://dx.doi.org/10.1152/jn.1996.76.5.2861.

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1. We studied the effects of photoinactivation of neuropil glial (NG) cells of the leech Hirudo medicinalis on neuronal activity and synaptic transmission. Each segmental ganglion contains two of these giant glial cells, which are electrically and dye coupled. 2. One of the two NG cells in an isolated segmental ganglion was filled with the dye Lucifer yellow (LY). Subsequent irradiation of the ganglion with laser light (440 nm) to photolyze LY caused irreversible depolarization of both NG cells. The NG cells that were filled with LY depolarized from -73 +/- 1.1 (SE) mV to -22 +/- 2.4 mV within
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Dissertations / Theses on the topic "Leech ganglion neurons"

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Moshtagh, Khorasani Majid. "Spontaneous and evoked electrical activity of neurons in leech Hirudo medicinalis studied by a new generation of voltage sensitive dyes." Doctoral thesis, SISSA, 2013. http://hdl.handle.net/20.500.11767/4092.

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By using the newly developed voltage sensitive dye VF2.1.Cl invented by Miller and colleagues (Miller et al. 2012), I monitored simultaneously the spontaneous electrical activity of approximately 80 neurons in a leech ganglion, representing around 20% of the entire neuronal population. Neurons imaged on the ventral surface of the ganglion either fired spikes regularly at a rate of 1-5 Hz or fired sparse spikes irregularly. In contrast, neurons imaged on the dorsal surface, fired spikes in bursts involving several neurons. The overall degree of correlated electrical activity among leech neurons
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Caulfield, Jason Patrick. "Preparation for nerve membrane potential readings of a leech, laboratory setup and dissection process." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/130.

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A well documented laboratory setup, leech preparation process, and bio-potential data recording process are needed. Repeatability and quality data recordings are essential and thus dictate the requirements of the laboratory setup and processes listed above. Advances in technology have both helped and hindered this development. While very precise equipment is required to record the low voltage bio-potentials, noisy electronic equipment and wires surrounding the work area provide high levels of interference. Proper laboratory setup and data recording processes, however, limit the unwanted in
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Book chapters on the topic "Leech ganglion neurons"

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Pentreath, Victor W. "Metabolic Interactions Between Neurons and Glial Cells in Leech and Snail Ganglia." In Neuron—Glia Interrelations During Phylogeny. Humana Press, 1995. http://dx.doi.org/10.1007/978-1-59259-468-9_7.

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Pentreath, V. W., A. J. Pennington, L. H. Seal, and K. Swift. "Modulation by Neuronal Signals of Energy Substrate in the Glial Cells of Leech Segmental Ganglia." In Glial-Neuronal Communication in Development and Regeneration. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71381-1_14.

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Calabrese, Ronald L. "The Heartbeat Neural Control System of the Leech." In Handbook of Brain Microcircuits, edited by Gordon M. Shepherd and Sten Grillner. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190636111.003.0053.

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In medicinal leeches, heartbeat is a continuous, automatic function. Rhythmic constrictions of two muscular lateral vessels (the hearts) move blood through the closed circulatory system. The hearts are coordinated so that one beats in a rear-to-front progression (peristaltically), whereas the other one beats nearly synchronously along its length. The same coordination modes as in the hearts—peristaltic and synchronous—occur in the heart motor neurons: on one side, they are active in a rear-to-front progression, while on the other, they are active nearly synchronously. The rhythmic activity pat
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Conference papers on the topic "Leech ganglion neurons"

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Romanenko, Sergii, Peter H. Siegel, Daniel A. Wagenaar, and Victor Pikov. "Comparison of the effects of millimeter wave irradiation, general bath heating, and localized heating on neuronal activity in the leech ganglion." In SPIE BiOS, edited by Gerald J. Wilmink and Bennett L. Ibey. SPIE, 2013. http://dx.doi.org/10.1117/12.2006504.

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