Journal ArticleDOI
Electrodynamic headphones and woofers for application in magnetic resonance imaging scanners
Frank Baumgart,Thomas Kaulisch,Claus Tempelmann,Birgit Gaschler-Markefski,Carola Tegeler,Frank Schindler,Detlef Stiller,Henning Scheich +7 more
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TLDR
Electrodynamic speakers compatible with (functional) magnetic resonance imaging (MRI) are described, where the speakers magnets are removed, their function is replaced by the scanner's magnetic field, resulting in an uncommon but efficient operation.Abstract:
Electrodynamic speakers compatible with (functional) magnetic resonance imaging (MRI) are described. The speakers magnets are removed, their function is replaced by the scanner's magnetic field, resulting in an uncommon but efficient operation. The method can be used with headphones as well as woofers. Functional MRI is not associated with any known biological risks, but as a method for visualization of task-specific activation of brain regions it is undesirably noisy. Thus, it requires both noise protection and efficient sound transmission systems for delivering acoustic stimuli to subjects. Woofers could possibly be used in active noise-control systems. The speakers described in this paper can be used for either task.read more
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Study design in fMRI: basic principles.
Edson Amaro,Gareth J. Barker +1 more
TL;DR: Some aspects of fMRI study design, including cognitive comparison strategies (factorial, parametric designs), and stimulus presentation possibilities along with technical aspects, such as limitations of signal to noise ratio, spatial, and temporal resolution are reviewed.
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Regulation of emotional responses elicited by threat-related stimuli
Falk Eippert,Ralf Veit,Nikolaus Weiskopf,Nikolaus Weiskopf,Michael Erb,Niels Birbaumer,Niels Birbaumer,Sillce Anders +7 more
TL;DR: It is demonstrated that amygdala responses to threat‐related stimuli can be controlled through the use of cognitive strategies depending on recruitment of prefrontal areas, thereby changing the subject's affective state.
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Identification of emotional intonation evaluated by fMRI.
Dirk Wildgruber,Axel Riecker,Ingo Hertrich,Michael Erb,Wolfgang Grodd,Thomas Ethofer,Hermann Ackermann +6 more
TL;DR: Findings indicate that partially distinct cerebral networks subserve processing of phonetic and intonational information during speech perception, as well as distinguishing the cerebral network engaged in the perception of emotional tone.
Journal ArticleDOI
Brain activity underlying emotional valence and arousal: A response-related fMRI study
TL;DR: FMRI data provide direct evidence for a functional segregation of brain structures underlying peripheral physiologic responses and verbal ratings along the emotional dimensions of valence and arousal.
Journal ArticleDOI
Functional Imaging Reveals Numerous Fields in the Monkey Auditory Cortex
TL;DR: This study functionally mapped the auditory cortex of behaving and of anesthetized macaque monkeys with high resolution fMRI and provides functional support for a model where three fields in primary auditory cortex are surrounded by eight neighboring “belt” fields in non-primary auditory cortex.
References
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Journal ArticleDOI
Processing strategies for time-course data sets in functional mri of the human brain
TL;DR: The most effective method for image processing involves thresholding by shape as characterized by the correlation coefficient of the data with respect to a reference waveform followed by formation of a cross‐correlation image.