Editing Central sulcus (section)

== Evolution of the central sulcus ==
The evolution of the central sulcus is theorized to have occurred in mammals when the complete dissociation of the original somatosensory cortex from its mirror duplicate developed in placental mammals such as primates,<ref name=":03">{{Cite journal|last1=Mendoza|first1=Germán|last2=Merchant|first2=Hugo|date=2014-11-01|title=Motor system evolution and the emergence of high cognitive functions|journal=Progress in Neurobiology|language=en|volume=122|pages=73–93|doi=10.1016/j.pneurobio.2014.09.001|pmid=25224031|s2cid=34279360|issn=0301-0082}}</ref> though the development did not stop there as time progressed the distinction between the two cortices grew.

=== Evolution in primates ===
The central sulcus is more prominent in apes as a result of fine-tuning of the motor system in apes.<ref name=":03" /> [[Hominini|Hominins]] (bipedal apes) continued this trend through increased use of their hands due to the advent of [[bipedalism]]. This allowed for their hands to be freed up from their use in [[Animal locomotion|locomotion]] to focus on more complex manipulative actions such as grasping, tool use, tool making, and many others.<ref name=":13">{{Cite journal|last1=Hopkins|first1=William D.|last2=Meguerditchian|first2=Adrien|last3=Coulon|first3=Olivier|last4=Bogart|first4=Stephanie|last5=Mangin|first5=Jean- François|last6=Sherwood|first6=Chet C.|last7=Grabowski|first7=Mark W.|last8=Bennett|first8=Allyson J.|last9=Pierre|first9=Peter J.|last10=Fears|first10=Scott|last11=Woods|first11=Roger|date=2014|title=Evolution of the Central Sulcus Morphology in Primates|journal=Brain, Behavior and Evolution|volume=84|issue=1|pages=19–30|doi=10.1159/000362431|issn=0006-8977|pmc=4166656|pmid=25139259}}</ref> 

Previous studies have also shown that the location where the split in the central sulcus occurs is at the division point between the wrist and the individual digits in primary motor cortex, further implicating the relation between the development of this region through the use of their digits.<ref name=":13" /> The KNOB is also a suggested cortical substrate of the hand, as there have been anatomical asymmetries which have been linked to hand preference and skill, further suggesting the development of hands in the formation of the central sulcus seeing as the KNOB is the central portion of the central sulcus folded over the buried gyrus.<ref name=":13" />