Variability in hand surface representations in areas 3b and 1 in adult owl and squirrel monkeys

@article{Merzenich1987VariabilityIH,
  title={Variability in hand surface representations in areas 3b and 1 in adult owl and squirrel monkeys},
  author={Michael Merzenich and Randall Nelson and Jon H. Kaas and Michael P. Stryker and William M. Jenkins and John M. Zook and Max S. Cynader and Axel Schoppmann},
  journal={Journal of Comparative Neurology},
  year={1987},
  volume={258}
}
Detailed microelectrode maps of the hand representation were derived in cortical areas 3b and 1 from a series of normal adult owl and squirrel monkeys. While overlap relationships were maintained, and all maps were internally topographic, many map features varied significantly when examined in detail. Variable features of the hand representations among different monkeys included (a) the overall shapes and sizes of hand surface representations; (b) the actual and proportional areas of… 

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Remarkably, the representations of some body parts were reversed in orientation in both area 3b and area 1 in squirrel monkeys as compared to owl and macaque monkeys, suggesting that both fields are divided into sectors where the basic somatotopic orientation is independently determined, that the orientation of some of these sectors is subject to reversal in evolution, and that matching sectors in areas3b and 1 are not independent in somattopic organization.

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