Document Detail


Analytical approaches for determining heat distributions and thermal criteria for infrared neural stimulation.
MedLine Citation:
PMID:  24002195     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
ABSTRACT. Infrared neural stimulation (INS) is becoming an important complementary tool to electrical stimulation. Since the mechanism of INS is photothermal, describing the laser-induced heat distribution is fundamental to determining the relationship between stimulation pulses and neural responses. This work developed both a framework describing the time evolution of the heat distribution induced by optical fluence and a new method to extract thermal criteria (e.g., temperature change and rate of change) for neural activation. To solve the general problem of describing the temperature distribution, a Green's function solution to the heat diffusion equation was determined and convolved with the optical fluence. This provided a solution in the form of a single integral over time, from which closed-form solutions can be determined for special cases. This work also yielded an expression for thermal relaxation time, which provides a rigorous description of thermal confinement for INS. The developed framework was then applied to experimental data from the cochlea to extract the minimum temperature increase and rate of that increase to stimulate the cochlear spiral ganglion. This result, and similar analyses applied to other neural systems, can then shed light on the fundamental mechanism for INS and aid the development of optical neuroprostheses.
Authors:
Bryan J Norton; Meghan A Bowler; Jonathon D Wells; Matthew D Keller
Related Documents :
23792365 - Wafer-scale fabrication of nanoapertures using corner lithography.
24181215 - Methods for estimating acoustic intensity in rocket noise fields.
15606935 - Modification of derivatives for resolution enhancement of bands in overlapped spectra.
24730845 - Behavior of nanoparticle clouds around a magnetized microsphere under magnetic and flow...
14683285 - Classical chaos with bose-einstein condensates in tilted optical lattices.
23834365 - Combined stokes vector and mueller matrix polarimetry for materials characterization.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biomedical optics     Volume:  18     ISSN:  1560-2281     ISO Abbreviation:  J Biomed Opt     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-09-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9605853     Medline TA:  J Biomed Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  98001     Citation Subset:  IM    
Affiliation:
Lockheed Martin Aculight, 22121 20th Avenue SE, Bothell, Washington 98021.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Integrated optical microfluidic biosensor using a polycarbazole photodetector for point-of-care dete...
Next Document:  Effects of Dietary Zinc Manipulation on Growth Performance, Zinc Status and Immune Response during G...