Neurons without demonstrable receptive fields outnumber neurons having receptive fields in samples from the somatosensory cortex of anesthetized or paralyzed cats and rats.

@article{Dykes1988NeuronsWD,
  title={Neurons without demonstrable receptive fields outnumber neurons having receptive fields in samples from the somatosensory cortex of anesthetized or paralyzed cats and rats.},
  author={Robert W. Dykes and Yvon A. Lamour},
  journal={Brain research},
  year={1988},
  volume={440 1},
  pages={133-43}
}
In many common experimental conditions the majority of the neurons isolated in cat and rat somatosensory cortex using extracellular recording techniques are unresponsive to somatic stimuli. This population of cells becomes amenable to experimental manipulation with iontophoretic administration of glutamate, other putative neurotransmitters, and their agonists and antagonists. During administration of glutamate or bicuculline methiodide as many as half of the unresponsive cells could be shown to… CONTINUE READING