The evaluation of spinal cord neuronal activity in humans with functional magnetic resonance imaging (fMRI) is technically challenging. Major difficulties arise from cardiac and respiratory movement artifacts that constitute significant sources of noise. In this paper we assessed the Correction of Structured noise using spatial Independent Component Analysis (CORSICA). FMRI data of the cervical...

Introduction MRI is a phase sensitive detection system and both magnitude and phase time-series are obtained in an fMRI study. The possibility to use both image sets for the statistical evaluation of fMRI has been proposed (1-2). The raw phase values are proportional to the local voxel-averaged magnetic field and are generally dominated by Bo field inhomogeneities, that are time-dependent in th...

Volumetric Space–Time Structure of Physiological Noise in BOLD fMRI Arno Solin, Simo Särkkä, Aapo Nummenmaa, Aki Vehtari, Toni Auranen, Simo Vanni, and Fa-Hsuan Lin Department of Biomedical Engineering and Computational Science, Aalto University, Espoo, Finland, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, United States, Advanced Magnetic Imag...

Introduction: Correcting physiological noise is important for the analysis of functional images, especially at higher fields. The RETROICOR method [1] is a common and effective way of removing physiological noise based on regressing out signals using a set of Fourier series constructed from independent physiological recordings (e.g. pulse-oximeter, respiratory bellows). However, the best set of...

Anthropogenic (man-made) noise, a global pollutant of international concern, is known to affect the physiology and behaviour of a range of organisms. However, experimental studies have tended to focus on trait means; intra-population variation in responses are likely, but have rarely been explored. Here we use established experimental methods to demonstrate a condition-dependent effect of addit...

In accordance with the EU energy policy, wind turbines are becoming increasingly widespread throughout Europe, and this trend is expected to continue globally. More people will consequently live close to wind turbines in the future, and hence may be exposed to wind farm noise. Of particular concern is the potential for nocturnal noise to contribute towards sleep disturbance of nearby residents....

This review examines ultradian oscillatory growth in the multicellular organs of higher plants. My objective is to derive insight about the underlying physiological processes powering expansion. If the process of diffuse growth is inherently oscillatory, then it is reasonable to expect entrainment of these cellular oscillators across a tissue and the emergence of coherent macroscopic growth osc...

INTRODUCTION The incorporation of technologies in the care of infants has contributed to increased survival; however, this has turned neonatal unit into a noisy environment. OBJECTIVE To evaluate the physiological and functional effects resulting from the exposure to noise on low-weight newborns in incubators in a neonatal unit. METHODS Prospective, observational, quantitative, exploratory,...