@article{HautzelTaylorKrauseetal.2001,
  author    = {Hautzel, H. and Taylor, J. G. and Krause, B. J. and Schmitz, N. and Tellmann, L. and Ziemons, Karl and Shah, N. J. and Herzog, H. and M{\"u}ller-G{\"a}rtner, H.-W.},
  title     = {The motion aftereffect: more than area V5/MT? Evidence from 15O-butanol PET studies},
  series = {Brain Research},
  volume    = {892},
  journal   = {Brain Research},
  number    = {2},
  isbn      = {0006-8993},
  pages     = {281 -- 292},
  year      = {2001},
  abstract  = {The motion aftereffect is a perceptual phenomenon which has been extensively investigated both psychologically and physiologically. Neuroimaging techniques have recently demonstrated that area V5/MT is activated during the perception of this illusion. The aim of this study was to test the hypothesis if a more broadly distributed network of brain regions subserves the motion aftereffect. To identify the neuronal structures involved in the perception of the motion aftereffect, regional cerebral blood flow (rCBF) measurements with positron emission tomography were performed in six normal volunteers. Data were analysed using SPM96. The motion-sensitive visual areas including area V5/MT were activated in both hemispheres. Additionally, the lateral parietal cortex bilaterally, the right dorsolateral prefrontal cortex, the anterior cingulate cortex and the left cerebellum showed significant increases in rCBF values during the experience of the waterfall illusion. In a further reference condition with identical attentional demand but no perception of a motion aftereffect elevated rCBF were found in these regions as well. In conclusion, our findings support the notion that the perceptual illusion of motion arises exclusively in the motion-sensitive visual area V5/MT. In addition, a more widespread network of brain regions including the prefrontal and parietal cortex is activated during the waterfall illusion which represents a non-motion aftereffect-specific subset of brain areas but is involved in more basic attentional processing and cognition.},
  language  = {de}
}
@article{StreunBrandenburgLarueetal.2001,
  author    = {Streun, M. and Brandenburg, G. and Larue, H. and Zimmermann, E. and Ziemons, Karl and Halling, H.},
  title     = {Pulse recording by free-running sampling},
  series = {IEEE Transactions on Nuclear Science},
  volume    = {48},
  journal   = {IEEE Transactions on Nuclear Science},
  number    = {3},
  isbn      = {0018-9499},
  pages     = {524 -- 526},
  year      = {2001},
  abstract  = {Pulses from a position-sensitive photomultiplier (PS-PMT) are recorded by free-running ADCs at a sampling rate of 40 MHz. A four-channel acquisition board has been developed which is equipped with four 12-bit ADCs connected to one field programmable gate array (FPGA). The FPGA manages data acquisition and the transfer to the host computer. It can also work as a digital trigger, so a separate hardware trigger can be omitted. The method of free-running sampling provides a maximum of information, besides the pulse charge and amplitude also pulse shape and starting time are contained in the sampled data. This information is crucial for many tasks such as distinguishing between different scintillator materials, determination of radiation type, pile-up recovery, coincidence detection or time-of-flight applications. The absence of an analog integrator allows very high count rates to be dealt with. Since this method is to be employed in positron emission tomography (PET), the position of an event is also important. The simultaneous readout of four channels allows localization by means of center-of-gravity weighting. First results from a test setup with LSO scintillators coupled to the PS-PMT are presented here},
  language  = {en}
}
@inproceedings{PetersZiemonsDammersetal.2001,
  author    = {Peters, H. and Ziemons, Karl and Dammers, J. and M{\"u}ller-Veggian, Mattea},
  title     = {Continuous head motion detection during MEG measurement using head location coils},
  series = {Proceedings of the 12th International Conference on Biomagnetism : August 13 - 17, 2000, Helsinki University of Technology, Espoo, Finland},
  booktitle = {Proceedings of the 12th International Conference on Biomagnetism : August 13 - 17, 2000, Helsinki University of Technology, Espoo, Finland},
  editor    = {Nenonen, Jukka},
  publisher = {Helsinki Univ. of Technology, Laboratory of Biomedical Engineering},
  address   = {Espoo},
  isbn      = {951-22-5401-8},
  pages     = {XX, 1060 S. : Ill., graph. Darst.},
  year      = {2001},
  language  = {en}
}