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Roles of brca2 (fancd1) in Oocyte Nuclear Architecture, Gametogenesis, Gonad Tumors, and Genome Stability in Zebrafish

Please always quote using this URN: urn:nbn:de:bvb:20-opus-142285
  • Functional near-infrared spectroscopy (fNIRS) is an established optical neuroimaging method for measuring functional hemodynamic responses to infer neural activation. However, the impact of individual anatomy on the sensitivity of fNIRS measuring hemodynamics within cortical gray matter is still unknown. By means of Monte Carlo simulations and structural MRI of 23 healthy subjects (mean age: (25.0 +/- 2.8) years), we characterized the individual distribution of tissue-specific NIR-light absorption underneath 24 prefrontal fNIRS channels. We,Functional near-infrared spectroscopy (fNIRS) is an established optical neuroimaging method for measuring functional hemodynamic responses to infer neural activation. However, the impact of individual anatomy on the sensitivity of fNIRS measuring hemodynamics within cortical gray matter is still unknown. By means of Monte Carlo simulations and structural MRI of 23 healthy subjects (mean age: (25.0 +/- 2.8) years), we characterized the individual distribution of tissue-specific NIR-light absorption underneath 24 prefrontal fNIRS channels. We, thereby, investigated the impact of scalp-cortex distance (SCD), frontal sinus volume as well as sulcal morphology on gray matter volumes (V(gray)) traversed by NIR-light, i.e. anatomy-dependent fNIRS sensitivity. The NIR-light absorption between optodes was distributed describing a rotational ellipsoid with a mean penetration depth of (23.6 +/- 0.7) mm considering the deepest 5% of light. Of the detected photon packages scalp and bone absorbed (96.4 +/- 9: 7)% and V(gray) absorbed (3.1 +/- 1.8)% of the energy. The mean V(gray) volume (1.1 +/- 0.4)cm(3) was negatively correlated (r = - .76) with the SCD and frontal sinus volume (r = - .57) and was reduced by 41.5% in subjects with relatively large compared to small frontal sinus. Head circumference was significantly positively correlated with the mean SCD (r = .46) and the traversed frontal sinus volume (r = .43). Sulcal morphology had no significant impact on V(gray). Our findings suggest to consider individual SCD and frontal sinus volume as anatomical factors impacting fNIRS sensitivity. Head circumference may represent a practical measure to partly control for these sources of error variance.show moreshow less

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Metadaten
Author: Adriana Rodríguez-Mari, Catherine Wilson, Tom A. Titus, Cristian Canestro, Ruth A. BreMiller, Yi-Lin Yan, Indrajit Nanda, Adam Johnston, John P. Kanki, Erin M. Gray, Xinjun He, Jan Spitsbergen, Detlev Schindler, John H. Postlethwait
URN:urn:nbn:de:bvb:20-opus-142285
Document Type:Journal article
Faculties:Medizinische Fakultät / Institut für Humangenetik
Language:English
Parent Title (English):PLoS Genetics
Year of Completion:2011
Volume:7
Issue:3
Pagenumber:e1001357
Source:PLoS Genetics 7(3): e1001357. doi:10.1371/journal.pgen.1001357
DOI:https://doi.org/10.1371/journal.pone.0026377
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Tag:apoptosis; embryos; genetic causes of cancer; gonads; oocytes; sperm; testes; zebrafish
Release Date:2019/08/02
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung