“Central sulcus is fully formed in all cases by 28 weeks” _whew_. so at least that’s a guarantee. “The central sulcus is a prominent landmark of the brain, separating the parietal lobe from the frontal lobe and the primary motor cortex from the primary somatosensory cortex.” I may have missed out on: Secondary cingulate sulci Insular sulci which develop at 30 weeks. https://en.wikipedia.org/wiki/Central_sulcus

Central sulcus is fully formed in all cases by 28 weeks”
_whew_. so at least that’s a guarantee.
 
“The central sulcus is a prominent landmark of the brain, separating the parietal lobe from the frontal lobe and the primary motor cortex from the primary somatosensory cortex.”
 
I may have missed out on:
 
Secondary cingulate sulci
Insular sulci
 
which develop at 30 weeks.
 
https://en.wikipedia.org/wiki/Central_sulcus

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