title: Exploring diazepam's effect on hemodynamic responses of mouse brain tissue by optical spectroscopic imaging.
abstract: In this study, a simple duel-optical spectroscopic imaging apparatus capable of simultaneously determining relative changes in brain oxy-and deoxy-hemoglobin concentrations was used following administration of the anxiolytic compound diazepam in mice with strong dominant (Dom) and submissive (Sub) behavioral traits. Three month old mice (n = 30) were anesthetized and after 10 min of baseline imaging, diazepam (1.5 mg/kg) was administered and measurements were taken for 80 min. The mouse head was illuminated by white light based LED's and diffused reflected light passing through different channels, consisting of a bandpass filter and a CCD camera, respectively, was collected and analyzed to measure the hemodynamic response. This work's major findings are threefold: first, Dom and Sub animals showed statistically significant differences in hemodynamic response to diazepam administration. Secondly, diazepam was found to more strongly affect the Sub group. Thirdly, different time-series profiles were observed post-injection, which can serve as a possible marker for the groups' differentiation. To the best of our knowledge, this is the first report on the effects of an anxiolytic drug on brain hemodynamic responses in mice using diffused light optical imaging.
authors: Department of Electrical and Electronics Engineering, Ariel University, Ariel 40700, Israel.
authors: David
authors: D
authors: Abookasis
authors: Department of Electrical and Electronics Engineering, Ariel University, Ariel 40700, Israel.
authors: Ariel
authors: A
authors: Shochat
authors: Department of Molecular Biology, Ariel University, Ariel 40700, Israel.
authors: Elimelech
authors: E
authors: Nesher
authors: Department of Molecular Biology, Ariel University, Ariel 40700, Israel.
authors: Albert
authors: A
authors: Pinhasov
keywords: (170.0110) Imaging systems; (170.3880) Medical and biological imaging; (170.4580) Optical diagnostics for medicine; (170.6510) Spectroscopy, tissue diagnostics