title: [The complex impedance frequency response and the equivalent circuit model of human brain].
abstract: The complex impedance measurements of human brain tissue in vitro are made by using four-electrode measurement methods in the frequency range from 0.1 Hz to 1 MHz. The Solartron 1255 B frequency response analyzer is used. The frequency response curves of the imaginary part of human brain's complex impedance do not appear as a single peak curve which other bio-tissues show, and the Cole-Cole diagram of human brain is different from the others as well. The construction of the equivalent circuit model obtained is more complex. However, these characteristics of human brain are all the same as rabbit brain's. The equivalent circuit model obtained will be helpful to constructing the equivalent circuit model of human head in the EIT researches.
authors.affiliation: Department of Medical Electronic Engineering, Faculty of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wu
authors.forename: Xiuzhen
authors.initials: X
authors.lastname: Dong
authors.forename: Mingxin
authors.initials: M
authors.lastname: Qin
authors.forename: Feng
authors.initials: F
authors.lastname: Fu
authors.forename: Fusheng
authors.initials: F
authors.lastname: You
authors.forename: Ruigang
authors.initials: R
authors.lastname: Liu
authors.forename: Xuetao
authors.initials: X
authors.lastname: Shi
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D017097:Electric Impedance; D004566:Electrodes; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008954:Models, Biological