Lunate sulcus

rdf:langString Lunate sulcus

rdf:langString Lunate sulcus

rdf:langString sulcus lunatus

rdf:langString Lunate sulcus

rdf:langString Lateral surface of left cerebral hemisphere, viewed from the side.

rdf:langString In brain anatomy, the lunate sulcus or simian sulcus, also known as the sulcus lunatus, is a fissure in the occipital lobe variably found in humans and more often larger when present in apes and monkeys. The lunate sulcus marks the transition between V1 and V2. The lunate sulcus lies further back in the human brain than in the chimpanzee's. The evolutionary expansion in humans of the areas in front of the lunate sulcus would have caused a shift in the location of the fissure. Evolutionary pressures may have resulted in the human brain undergoing internal reorganization to develop the capability of language. It has been speculated that this reorganization is implemented during early maturity and is 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 Australopithecus africanus is pongid-like.

rdf:langString sulcus lunatus