- Generic model of folding, based on indivisible units, called sulcal roots, which correspond to the first folding locations during antenatal life.
- These units are organised according to a basic scheme allowing us to describe the cortical surface using a system of meridians and parallels.
- This scheme is thought to be stable across individuals at the foetal stage, and may be related to the protomap model.
- Variability at the adult stage is thought to result from the chaotic behaviour of the folding process
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