Lateral surface of left cerebral hemisphere, viewed from the side.
|NeuroLex ID||Lunate sulcus|
The lunate sulcus lies further back of human brains but has a more frontal location in chimpanzees. The evolutionary expansion of the frontal areas of the lunate sulcus would have caused a shift in the particular location of the fissure. It has been hypothesized that evolutionary pressures resulted in the human brain undergoing internal reorganization to develop the capability of human language. Furthermore, this reorganization must have been implemented during early maturity and is likely responsible for eidetic imagery in some adolescents.
During early development, the neural connections in prefrontal cortex and posterior parietal lobe rapidly expand to allow capability for human language, while visual memory capacity of human brain would become limited. Biological studies have demonstrated that the lunate sulcus is subject to white matter growth, and dental fossil and tomography studies have shown that the brain organization of Africanus is pongid-like.
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- Srijit D, Shipra P (2008). "Unilateral absence of the lunate sulcus: an anatomical perspective". Rom J Morphol Embryol. 49 (2): 257–8. PMID 18516336.
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- Ko, Kwang Hyun (2015). "Brain Reorganization Allowed for the Development of Human Language: Lunate Sulcus". International Journal of Biology. 7: 59. doi:10.5539/ijb.v7n3p59.
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- Dean, C (2001). "Growth processes in teeth distinguish modern humans from Homo erectus and earlier hominins". Nature. 414: 628–631. doi:10.1038/414628a.
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