Abstract
Ultrasound traversing a biologic fluid or tissue generates a local change in electrical conductivity known as the acoustoelectric effect. The authors exploit this interaction to image ionic current injected into the abdominal segment of the lobster nerve cord. A pair of recording electrodes detected the acoustoelectric signal induced by pulses of focused ultrasound (1.4 or 7.5 MHz). The signal was linear with injected current at 2 MPa (0.7 μV/mA cm 2) and pressure at 75 mA/cm2 (23 μV/MPa). Acoustoelectric imaging of biocurrents potentially enhances spatial resolution of traditional electrophysiology and merits further study as an imaging modality for neural applications.
Original language | English (US) |
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Article number | 163902 |
Journal | Applied Physics Letters |
Volume | 90 |
Issue number | 16 |
DOIs | |
State | Published - 2007 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)