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Evolution of the Central Sulcus
The evolution of the Central Sulcus is theorized to have occurred in mammals when the complete dissociation of the somatosensory cortex from its mirror duplicate developed in placental mammals such as primates. Though the development did not stop there, as time progressed the distinction between the two cortexes grew.

Especially during the split between old world monkeys and apes as apes fine-tuned their motor system. The ability to forage while simultaneously trying to detect predators was already one big evolutionary advantage as shown in marmoset monkeys. However, apes were able to increase their usage of their hands due to the advent of bipedalism, which allowed for their hands to be freed up from their use in locomotion to focus on more complex manipulative actions. Actions such as prehensile grasping, tool use, tool making and many others developed by the time devoted to the use of their hands.

Previous studies have also shown that where the split in the Central Sulcus occurs there is where the division of the wrist from the individual digits is topographically, further implicating the relation between the development of this region through the use of their digits. 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.