Dictionary > Microelectrode

Microelectrode

Definition
noun, plural: microelectrodes
An electrode with a tip having dimensions of the order of one micrometer, thereby extremely small enough to puncture the plasma membrane without causing damage, often used for electrophysiological studies, such as the recording of the resting and the action potentials inside the cell, and the measurement of intracellular ion and pH levels
Supplement
Microelectrodes are very small electrodes (about one micrometer in dimensions) that can be inserted into the plasma membrane while not destroying or causing damage to the cell. They are used for studying the electrophysiology of living cells and tissues. They are used to record the neural signals or the electrical stimulation of the nervous tissue. They are used specifically for potential recording, current injection, introduction of ion-selective resins into the cell in order to measure the resting and action potentials or the free concentration of cytosolic constituents.1 Microelectrodes are made from inert metals with high Young modulus such as tungsten, stainless steel, platinum, and iridium oxide.2
Word origin: Greek mīkrós (small) + electrode
See also:

Mentioned in:

  • microinjection
  • voltage clamp
  • micrometer
  • Reference(s):

    1 J. V. Halliwell, M. J. Whitaker and D. Ogden. Using microelectrodes. www.utdallas.edu/~tres/microelectrode/microelectrodes-ch01.pdf Link

    2Cogan, Stuart F. (August 2008). “Neural Stimulation and Recording Electrodes”. Annual Review of Biomedical Engineering 10 (1): 275–309. Link


    You will also like...

    Bryophytes
    Bryophytes

    Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..

    Human perception in action
    Human Perception – Neurology

    This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

    Fossil trilobite imprint in the sediment
    Insects

    There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

    An artistic depiction of a human embryo
    Growth and Development of a Human Baby

    Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

    Chromosomes X and Y and Sex Determination
    Chromosomes X and Y and Sex Determination

    This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    Related Articles...

    No related articles found

    See all Related Topics