메뉴 건너뛰기




Volumn 307, Issue 5711, 2005, Pages 896-901

Optical imaging of neuronal populations during decision-making

Author keywords

[No Author keywords available]

Indexed keywords

BIODIVERSITY; DECISION MAKING; DYES; LINEAR EQUATIONS; POPULATION STATISTICS; PRINCIPAL COMPONENT ANALYSIS; SENSITIVITY ANALYSIS; SENSORY PERCEPTION;

EID: 13644261674     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1103736     Document Type: Article
Times cited : (271)

References (40)
  • 28
    • 2142803437 scopus 로고    scopus 로고
    • Materials and methods are available as supporting material on Science Online.
    • Science Online
  • 33
    • 13644270831 scopus 로고    scopus 로고
    • note
    • LDA seeks a line in the multidimensional phase space of a system such that grouped data points projected onto the line are maximally separated (i.e., the distributions of swimming versus crawling data points along the line are maximally separated). The slope of this line indicates the relative contribution of each of the variables to this separation. The goal is to find the time at which the swimming and crawling data projected onto a linear discriminant are significantly separated. This technique is susceptible to overfilling when applied in a high-dimensional space with a limited amount of data. To overcome this problem, one may either increase the number of samples or decrease the dimensionality of the system. Phototoxicity limits the amount of data we can collect, so we instead used PCA to reduce the dimensionality of our data sets.
  • 34
    • 13644253303 scopus 로고    scopus 로고
    • note
    • PCA rotates the axes of our N-dimensional data (where N is the number of neurons) so that the first few axes point in the directions of maximal covariance. These new directions are the PCs. A neuron with very different activity between swimming and crawling trials will have a large variance across trials. This neuron would then contribute strongly to one of the first few PCs.
  • 37
    • 13644259390 scopus 로고    scopus 로고
    • note
    • LDA may have been found had we been able to use all of the PCs. This illustrates the inherent tradeoff between the dimensionality of a system and the amount of data required to adequately sample a high-dimensional space.
  • 40
    • 13644255531 scopus 로고    scopus 로고
    • note
    • We thank J. E. Gonzalez and R. Y. Tsien for assistance with the FRET voltage-sensitive dyes; Panvera LLC for supplying the dyes gratis; C. Schaffer for assistance with designing the wavelength-switching device; J. Shlens, A. L. Taylor, S. B. Mehta, and E. Thomson for valuable discussions; and H. J. Chiel, M. B. Feller, D. Kleinfeld, and T. J. Sejnowksi for helpful comments and suggestions on an earlier version of this manuscript. Supported by a La Jolla Interfaces in Science Predoctoral Fellowship, funded by the Burroughs Wellcome Fund (K.L.B.); a NSF Integrative Graduate Education and Research Traineeship (IGERT) training grant (K.L.B.); NIH research grants nos. MH43396 (W.B.K.) and NS40110 (H.D.I.A); U.S. Department of Energy grant no. DE-FG03-90ER14138 (H.D.I.A); NSF research grant no. PHY0097134 (H.D.I.A); and the Office of Naval Research, contract no. N00014-00-1-0181 (H.D.I.A).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.