In the article, "Woman of 24 Fount to Have No Cerebellum in Her Brain" by Helen Thomson, a woman in China was discovered to miss a vital part of her brain that controls voluntary function like speech and walking. Although having warning signs such as not walking until the age of 7 and speaking was unintelligable until the age of 6, it was never noticed.
The central sulcus is a fold separating the frontal and parietal lobes of the brain. This groove filled with fluid divides the motor skills from the sensory skills making it important to be aware of, especially during epilepsy surgeries. The shape also determines the severity of small subcortical ischemic strokes that occur in mostly younger children. In conclusion, it is unlikely to be functional without a central sulcus because of its importance to separate the motor and sensory output places of the brain.
http://healthylifemed.com/central-sulcus/
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