Effect of time-varying magnetic fields on the action potential in lobster giant axon

Ueno, S.; Lövsund, Per; På, Öberg

doi:10.1007/bf02443969

Cited by 23 publications

(4 citation statements)

References 13 publications

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“…www.nature.com/scientificreports www.nature.com/scientificreports/ As a seasonal migratory species 34,53 , H. americanus may possess a polarity compass similar to P. argus 35,36 that could be used in homing and/or migration. To date there is no reported evidence of a magnetoreceptive sensory ability in H. americanus and there is limited anatomical research in crustaceans [54][55][56] . However support for a crustacean ability to detect magnetic stimuli arises from behavioural responses to the geomagnetic field e.g.…”

Section: Height From Seabed Yesmentioning

confidence: 99%

Anthropogenic electromagnetic fields (EMF) influence the behaviour of bottom-dwelling marine species

Hutchison

Gill

Sigray

et al. 2020

Sci Rep

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Many marine animals have evolved sensory abilities to use electric and magnetic cues in essential aspects of life history, such as to detect prey, predators and mates as well as to orientate and migrate. Potential disruption of vital cues by human activities must be understood in order to mitigate potential negative influences. Cable deployments in coastal waters are increasing worldwide, in capacity and number, owing to growing demands for electrical power and telecommunications. Increasingly, the local electromagnetic environment used by electro-and magneto-sensitive species will be altered. We quantified biologically relevant behavioural responses of the presumed, magneto-receptive American lobster and the electro-sensitive Little skate to electromagnetic field (EMF) emissions of a subsea high voltage direct current (HVDC) transmission cable for domestic electricity supply. We demonstrate a striking increase in exploratory/foraging behaviour in skates in response to EMF and a more subtle exploratory response in lobsters. In addition, by directly measuring both the magnetic and electric field components of the EMF emitted by HVDC cables we found that there were DC and unexpectedly AC components. Modelling, restricted to the DC component, showed good agreement with measured results. Our cross-disciplinary study highlights the need to integrate an understanding of the natural and anthropogenic EMF environment together with the responses of sensitive animals when planning future cable deployments and predicting their environmental effects. Electromagnetic fields (EMFs) pervade the whole of the earth's environment and have been present throughout evolution of life on earth. The most dominant natural EMFs in the marine environment are the Earth's geomagnetic field (25-65 µT) and motionally induced electric fields, resulting from conductive seawater moving through the geomagnetic field 1. Organisms themselves also emit important but weak bioelectric fields resulting from cellular processes and muscular movements 2. Electromagnetic (EM) senses in marine animals have evolved multiple times across many taxa with a variety of, and sometimes multiple, sensory systems including magnetite-based, photo-chemical mechanisms, lateral lines and ampullae of Lorenzini 3,4. Magneto-sensitive animals respond to small changes in the inclination, intensity and/or direction of a magnetic field 4. They employ either a magnetic compass and/or magnetic map enabling homing and/or migration over short and long distances 5. Electro-sensitive species are able to detect weak electric fields used to detect prey and predators, to communicate, find mates and/or locally orientate 6. Electro-sensitive species are also able to respond to magnetic fields using electro-sensory apparatus and some species may have both electro and magneto-sensory apparatus 7. While we are still trying to understand the mechanisms involved in EM-sensing 4,7 , the functional roles are clearly of fundamental ecological importance. Interference with animal's sensory abiliti...

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Section: Height From Seabed Yesmentioning

confidence: 99%

Anthropogenic electromagnetic fields (EMF) influence the behaviour of bottom-dwelling marine species

Hutchison

Gill

Sigray

et al. 2020

Sci Rep

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“…A core is a very effective way of increasing the magnetic flux. There are several examples in the literature of ferrite and iron cores used for clinical magnetic stimulation [51,[67][68][69][70][71] and in vitro experimentation [51,70,[72][73][74][75]. An alternate method of including a core is in [69] where FEA simulation showed a 50% increase by incorporating a cylindrical plate twice the thickness and 30% larger than the coil diameter.…”

Section: Corementioning

confidence: 99%

Magnetic Stimulation of Neural Tissue: Techniques and System Design

Basham

Yang²,

Tchemodanov³

et al. 2009

Biological and Medical Physics, Biomedical Engineering

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Magnetic stimulation of neural tissue is an attractive technology because neural excitation may be affected without the implantation of electrodes. This chapter provides a brief overview of the technology and relevant literature. While extensive magnetic stimulation modeling and clinical experimentation work has been presented, considerably less quantitative in vitro work has been performed. In vitro experiments are critical for characterizing the site of action, the structures stimulated, and the long-term tissue histological effects. In vitro systems may also facilitate the development of novel magnetic stimulation approaches. To demystify magnetic stimulation systems, this chapter presents an in vitro experimental system using a systematic design methodology. The modeling methods are designed to aid experimentation. Circuit schematics, test rigs, and supplier information are given to support practical implementation of this design methodology. Example neural preparations and their modeling and use are also covered. Finally, as an alternative to pulsed discharge circuits for magnetic stimulation, this chapter shows how to use a circuit to deliver asymmetric current pulses to generate the magnetic field.

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“…We carried out an experiment to measure action potentials of lobster giant axons under time-varying magnetic fields [Ueno et al, 1986a]. The nerve axon was excited by galvanic stimulation, and the action potential was recorded intracellularly with microelectrodes.…”

Section: Magnetic Nerve Stimulation and Transcranial Magnetic Stimulamentioning

confidence: 99%

Studies on magnetism and bioelectromagnetics for 45 years: From magnetic analog memory to human brain stimulation and imaging

Ueno

2011

Bioelectromagnetics

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Forty-five years of studies on magnetism and bioelectromagnetics, in our laboratory, are presented. This article is prepared for the d'Arsonval Award Lecture. After a short introduction of our early work on magnetic analog memory, we review and discuss the following topics: (1) Magnetic nerve stimulation and localized transcranial magnetic stimulation (TMS) of the human brain by figure-eight coils; (2) Measurements of weak magnetic fields generated from the brain by superconducting quantum interference device (SQUID) systems, called magnetoencephalography (MEG), and its application in functional brain studies; (3) New methods of magnetic resonance imaging (MRI) for the imaging of impedance of the brain, called impedance MRI, and the imaging of neuronal current activities in the brain, called current MRI; (4) Cancer therapy and other medical treatments by pulsed magnetic fields; (5) Effects of static magnetic fields and magnetic control of cell orientation and cell growth; and (6) Effects of radio frequency magnetic fields and control of iron ion release and uptake from and into ferritins, iron cage proteins. These bioelectromagnetic studies have opened new horizons in magnetism and medicine, in particular for brain research and treatment of ailments such as depression, Parkinson's, and Alzheimer's diseases.

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Effect of time-varying magnetic fields on the action potential in lobster giant axon

Cited by 23 publications

References 13 publications

Anthropogenic electromagnetic fields (EMF) influence the behaviour of bottom-dwelling marine species

Anthropogenic electromagnetic fields (EMF) influence the behaviour of bottom-dwelling marine species

Magnetic Stimulation of Neural Tissue: Techniques and System Design

Studies on magnetism and bioelectromagnetics for 45 years: From magnetic analog memory to human brain stimulation and imaging

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