Spontaneous electrical activity and behavior in the leech Hirudo medicinalis
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چکیده
منابع مشابه
Spontaneous Electrical Activity and Behavior in the Leech Hirudo Medicinalis
In the absence of external stimuli, animals explore the environment by performing irregular movements, but the neuronal mechanisms underlying this arrhythmic motion are largely unknown. In this paper, we studied the relationship between the spontaneous neuronal activity in the leech (Hirudo medicinalis) and its behavior. We analyzed the electrical activity of isolated ganglia, chains of two con...
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Giant viruses and amoebae are common in freshwater, where they can coexist with other living multicellular organisms. We screened leeches from the species Hirudo medicinalis for giant viruses. We analyzed five H. medicinalis obtained from Tunisia (3) and France (2). The leeches were decontaminated and then dissected to remove internal parts for co-culture with Acanthamoeba polyphaga. The genome...
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Experiments were performed to determine the role of acetylcholine (ACh) in neuromuscular transmission in the heart of the leech Hirudo medicinalis. Superfused or iontophoretically applied ACh rapidly depolarized both isolated heart muscle cells and muscle cells in isolated hearts in a dose-dependent manner. the depolarization was associated with a conductance increase of the muscle membrane tha...
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In leech visual cells the presumed light-absorbing structures are microvilli arising from the membrane of what would seem to be a large intracellular vacuole. This vacuole, however, is an extracellular compartment, since it communicates with the intercellular spaces through narrow channels. Therefore, the membrane of the microvilli is-as in other invertebrate visual cells-a part of the cell mem...
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The fibrocytes and the fibres of Hirudo medicinalis have been studied with the electron microscope. The fibrocyte can be shown by other methods to contain triglyceride droplets, phospholipid droplets, and mitochondria, all of which can be recognized in the electron micrographs. In addition, a 'vesicular' component has been observed just below the cell surface. The collagenous 'cortex' of the fi...
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ژورنال
عنوان ژورنال: Frontiers in Integrative Neuroscience
سال: 2007
ISSN: 1662-5145
DOI: 10.3389/neuro.07.008.2007