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An inexpensive miniature preamplifier for monitoring electroencephalographic and extracellular action potentials in unrestrained animals. 1975

C J Sherry, and T J Marczynski, and G Karmos, and J Y Wei

A miniature preamplifier is described that is suitable for use with microelectrodes with moderately high impedance (i.e. 10 to 25 micron diameter). The device has a gain of 500 and an imput impedance of 2.2 X 10(7) ohms. The imput noise is less than 20 microvolts r.m.s.

UI MeSH Term Description Entries
D008839 Microelectrodes Electrodes with an extremely small tip, used in a voltage clamp or other apparatus to stimulate or record bioelectric potentials of single cells intracellularly or extracellularly. (Dorland, 28th ed) Electrodes, Miniaturized,Electrode, Miniaturized,Microelectrode,Miniaturized Electrode,Miniaturized Electrodes
D012149 Restraint, Physical Use of a device for the purpose of controlling movement of all or part of the body. Splinting and casting are FRACTURE FIXATION. Immobilization, Physical,Physical Restraint,Physical Immobilization,Physical Restraints,Restraints, Physical
D004569 Electroencephalography Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. EEG,Electroencephalogram,Electroencephalograms
D000200 Action Potentials Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli. Spike Potentials,Nerve Impulses,Action Potential,Impulse, Nerve,Impulses, Nerve,Nerve Impulse,Potential, Action,Potential, Spike,Potentials, Action,Potentials, Spike,Spike Potential
D000669 Amplifiers, Electronic Electronic devices that increase the magnitude of a signal's power level or current. Amplifier, Electronic,Electronic Amplifier,Electronic Amplifiers

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