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Simple and Cost-effective Hardware and Software for Functional Brain Mapping Using Intrinsic Optical Signal Imaging by Thomas C. Harrison; Albrecht Sigler; Timothy H. Murphy is a Neuroscience article available to read on EtoBox.

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We describe a simple and low-cost system for intrinsic optical signal (IOS) imaging using stable LED light sources, basic microscopes, and commonly available CCD cameras. IOS imaging measures activity-dependent changes in the light reflectance of brain tissue, and can be performed with a minimum of specialized equipment. Our system uses LED ring lights that can be mounted on standard microscope objectives or video lenses to provide a homogeneous and stable light source, with less than 0.003% fluctuation across images averaged from 40 trials. We describe the equipment and surgical techniques necessary for both acute and chronic mouse preparations, and provide software that can create maps of sensory representations from images captured by inexpensive 8-bit cameras or by 12-bit cameras. The IOS imaging system can be adapted to commercial upright microscopes or custom macroscopes, eliminating the need for dedicated equipment or complex optical paths. This method can be combined with parallel high resolution imaging techniques such as two-photon microscopy.

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Author

Thomas C. Harrison; Albrecht Sigler; Timothy H. Murphy

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0165-0270)

Published

2009

Language

EN

Field

Neuroscience (Life Sciences)