ioanna kapantai

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ioanna kapantai
Posted over 2 years ago
"What is so special about human brain, as compared to other primates"?
haha I shall thank you for posting a relative article, if anything!! I actually have researched quite a lot about it and have found the following points as for what it is that makes the human brain unique: 1) Human have a 3 times bigger relative brain size (relative brain size: the analogy between body mass/weight and brain size..) than a hypothetical human primate of the same body size. It has not been proven that size is related to cognitive ability and therefore the aforementioned fact does not necessarily suggest that humans have an enhanced cognitive capability because of their brain size.. However, solely the fact that the human brain is 3 times larger than its expected size, does somewhat make the human brain unique. 2) The connectivity of the neurons in the brain and in particular the cerebral cortex are more developed than in other non human primates. Still, the actual different regions of the brain are the same ones in the human brain and the brain of other non human primates; for example a rat's brain consists of the same components as this of a human, however, the neural connections in a human brain are more developed. The above said (developed neural connectivity has been linked with enhanced intelligence) 3)Genes: FOXP2: a gene involved with language, speech production and reading, appears to have had a mutation. the mutant gene is apparent only in human brains, the original form of the gene is apparent in other mammals as well. the mutant gene has been linked to the ability for humans to speak, read etc. another gene that only exists in the human brain: ASPM :)
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ioanna kapantai
Posted over 2 years ago
"What is so special about human brain, as compared to other primates"?
I absolutely agree with both the point made hereby. however, I am looking for the physiological significant differences between humans and other primates and how the development or organization of these make us special. it is rather surprising that all the aforementioned traits (sense of self, ability to perceive someone's state and emotions etc etc) are the result of complex procedures within the brain. each of these traits, correspond to specific procedures in specific parts of the brain. for example, the so called "Broca's area" is a region in the cerebral cortex, responsible for the production of language. The same region can be found in the brain of a rat or a monkey! however, monkeys and/or rats do not speak! Why?? This is the question I am trying to resolve. Is it because humans, as compared to other primates, have more stimuli available to them? If so, then, wasn't it humans that created these stimuli at the first place? Broca's area is just one example of the similarities between human and animal brains. In fact, if you compare the composition of a human brain and the composition of the brain of a rat they are made of the absolutely same components. the only difference between the human brain and that of the rat is that the latter lacks fissures and gyri as it is much smoother. And I come back to the same question, why can we speak (for example) and a rat can not? What is it about out brain that makes us superior?
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ioanna kapantai
Posted over 2 years ago
"What is so special about human brain, as compared to other primates"?
As far as the genetic influences are concerned, the gene FOXP2 which is associated with speech and language has been apparent in out ancestors as well. how come chimpanzees-that did have the foxp2 (and so do we, humans) could not speak and we can? environment i dont think plays a specific role in brain evolution itself. it does play a significant role in education and our acquired knowledge, morals etc etc but the physical properties of these procedures and how such information gets processed remains the same-similar to other primates!.. ?