Discrete and analogue quantity processing in the parietal lobe: a functional MRI study.

@article{Castelli2006DiscreteAA,
  title={Discrete and analogue quantity processing in the parietal lobe: a functional MRI study.},
  author={Fulvia Castelli and Daniel Glaser and Brian Butterworth},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2006},
  volume={103 12},
  pages={
          4693-8
        }
}
The human intraparietal sulcus (IPS) is implicated in processing symbolic number information and possibly in nonsymbolic number information. Specific IPS activity for discrete quantities (numerosities) as compared with continuous, analogue quantity has not been demonstrated. Here we use a stimulus-driven paradigm to distinguish automatic estimation of "how many things" from "how much" and "how long." The discrete analogue response task (DART) uses the perception of hues which can change either… 

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