title: Detection of neural activity using phase-sensitive optical low-coherence reflectometry.
abstract: We demonstrate non-contact sub-nanometer optical measurement of neural surface displacement associated with action potential propagation. Experimental results are recorded from nerve bundles dissected from crayfish walking leg using a phase-sensitive optical low coherence reflectometer. No exogenous chemicals or reflection coatings are applied. Transient neural surface displacement is less than 1 nm in amplitude, 1 ms in duration and is coincident with action potential arrival to the optical measurement site. Because the technique uses back-reflected light, noninvasive detection of various neuropathies may be possible.
authors.forename: Taner
authors.initials: T
authors.lastname: Akkin
authors.forename: Digant
authors.initials: D
authors.lastname: Davé
authors.forename: Thomas
authors.initials: T
authors.lastname: Milner
authors.forename: H
authors.initials: H
authors.lastname: Rylander Iii