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Neurons with multiple tuned pads tended to have similar preferred orientations on their tuned pads, which can be interpreted as evidence for integration of information across fingers or as a form of positional invariance.
Journal ArticleDOI
R.B. Muir, R.N. Lemon 
21 Feb 1983-Brain Research
462 Citations
The firing behaviour of these cortical neurons indicates a particular functional role in the fractionation of muscular actio needed to produce fine independent movements of the fingers.
We also show that both B52 neurons are sensory neurons.
This suggests that these neurons are presumably excitatory.
The results agree with traditionally alleged topography for fingers in the human motor cortex: ulnar fingers—medial and radial fingers—lateral.
The cutaneous innervation of all peripheral nerves supplying the fingers may differ from the innervation patterns described in the various distribution charts.
(6)These results indicate that the representation of fingers in areas 3a and 3b of the conscious monkey is divided into multiple somatotopic subdivisions each representing a functional region of the hand and fingers.
This implies interaction between afferent impulses from the two fingers and/or partly intermingled cortical representations.