medicinal leech
Reproduction Efficiency of the Medicinal Leech Hirudo verbana Carena, 1820
... a medicinal leech Hirudo verbana Carena, ...gravid medicinal leeches weighted ...adult leech weights and the number of the laid cocoons, between the adult leech weight and the laid ...
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Physiological, pharmacological and behavioral evidence for a TRPA1 channel that can elicit defensive responses in the medicinal leech
... the medicinal leech. The leech ’ s polymodal nociceptive neuron was activated by both peripheral and central application of the TRPA1 agonist AITC in a concentration-dependent ...the medicinal ...
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Switching in the activity state of an interneuron that controls coordination of the hearts in the medicinal leech (Hirudo medicinalis)
... The rhythmically active heart interneuron HN(5) in the medicinal leech exhibits two distinct activity states, which have been associated with different coordination states of the two hearts. During the ...
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Responses to mechanically and visually cued water waves in the nervous system of the medicinal leech
... Aquatic predators utilize a wide variety of sensory modalities to localize their prey. Some use modalities that are also available to predators in other environments, such as the larvae of the gray treefrog, Hyla ...
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Low Level Antimicrobials in the Medicinal Leech Select for Resistant Pathogens That Spread to Patients
... the medicinal leech, Hirudo verbana, and used this natural system to understand the role of low levels of antimicrobials in enabling resistant bacteria to persist among sensitive strains in their ...
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The stomatogastric nervous system of the medicinal leech: its anatomy, physiology and associated aminergic neurons
... the medicinal leech increases its body size by 10-fold or more, and thus a single meal can sustain a leech for 6 months to a year (Dickinson and Lent, 1984; Lent et ...
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A cephalic projection neuron involved in locomotion is dye coupled to the dopaminergic neural network in the medicinal leech
... Kristan, 1986). Cells 204 and 61 contribute in parallel to the activation of the swim CPG, and may coordinate their efforts through electrical coupling. Tr2 may likewise contribute to the inhibition of swimming through ...
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Seasonal variation of long term potentiation at a central synapse in the medicinal leech
... Long-term potentiation (LTP) is a persistent increase in synaptic transmission that is thought to contribute to a variety of adaptive processes including learning and memory. Although learning is known to undergo ...
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Physiological and behavioral evidence of a capsaicin sensitive TRPV like channel in the medicinal leech
... 5 NaOH and 10 HEPES, pH 7.4). For electrophysiological experiments using isolated ganglia, individual ganglia were dissected and placed within a recording chamber (2 ml). All pharmacological treatments were applied ...
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Detection and selective avoidance of near ultraviolet radiation by an aquatic annelid: the medicinal leech
... Each leech was allowed to become quiescent, which typically took 2–5 min, but rarely was as long as 30 ...the leech had to remain quiescent for at least 30 ...
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Neuronal control of swimming in the medicinal leech IV Identification of a network of oscillatory interneurones
... Moreover, the absence of an activity rhythm of individual swim oscillatory interneurones during non-swimming cannot be attributed to the absence of tonic excitatory or presence of tonic [r] ...
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PROPERTIES OF A SET OF INTERNAL RECEPTORS IN THE MEDICINAL LEECH: THE NEPHRIDIAL NERVE CELLS MONITOR EXTRACELLULAR CHLORIDE CONCENTRATION
... Recordings from intact preparations show the NNCs to be insensitive to the increase in blood volume after crop loading, as the frequency of bursts is high after hypotonic Figs 5B, la but[r] ...
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Neuronal control of swimming in the medicinal leech V Connexions between the oscillatory interneurones and the motor neurones
... Individual impulses recorded from cell 33 are seen to be followed by an excitatory synaptic potential in homologues of cell 3 of the next anterior ganglion and of a ganglion 5 segments t[r] ...
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Beyond the central pattern generator: amine modulation of decision making neural pathways descending from the brain of the medicinal leech
... Fig.·1. Distribution of 5-HT-immunoreactive (5-HT-ir) neurons and associated processes in the subesophageal (SEG) and supraesophageal (SPEG) ganglia comprising the leech head brain. The brain of an embryonic ...
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Initiation, Maintenance and Modulation of Swimming in the Medicinal Leech by the Activity of a Single Neurone
... To assess the degree of similarity between swimming episodes induced by cell 204 stimulation and those previously described in the isolated nerve cord Kristan & Calabrese, 1976, segmenta[r] ...
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Ingestive behaviour and physiology of the medicinal leech
... The duration of ingestive behaviour was influenced by the initial mass of the leech; small leeches ingested blood for slightly longer than large ones Fig.. In contrast, duration of inges[r] ...
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On the termination of ingestive behaviour by the medicinal leech
... Ingestion is terminated as a result of distension of the body: experimentally distending leeches as they feed causes an immediate cessation of ingestion and inhibits any subsequent bitin[r] ...
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Habituation of swimming activity in the medicinal leech
... We have found that six of these characteristics are found in the swimming response elicited by repetitive tactile body wall stimulation: reduction in response amplitude, spontaneous reco[r] ...
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Physiology of Water Motion Detection in the Medicinal Leech
... These experiments revealed that neuronal spiking activity resulting from this type of stimulation occurs in both the anterior and posterior roots of segmental ganglia in all segments of [r] ...
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A Sensory System Initiating Swimming Activity in the Medicinal Leech
... We report, first, that a semi-intact leech preparation in which some ventral nerve cord ganglia are exposed for intracellular recording and the posterior end of the animal remains nearly[r] ...
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