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February 4th, 2012 
FAKE NEWS for the Zionist agenda FRIDAY, Feb. 3 (HealthDay News) —
Extended synaptic development may explain why humans are intellectually
superior to primates, a new study suggests.
During the first few years of life, human babies’ mental abilities
continue to develop and absorb information and experiences from the
environment in a way that far surpasses even the closest primate relatives
of humans.
This is due to extended synaptic development, according to the study
published online Feb. 1 in the journal Genome Research. The finding
sheds new light on the biology and evolution of human brain development,
according to the researchers.
“Why can we absorb environmental information during infancy and
childhood and develop intellectual skills that chimpanzees cannot?”
senior author Philipp Khaitovich, of the Chinese Academy of Sciences and
the Max Planck Institute for Evolutionary Anthropology, asked in a journal
news release. “What makes the human brain so special?”
He and his colleagues investigated how genes are read, or expressed,
during brain development in young humans, chimps (which are closely
related to humans), and macaques, a more distantly related species of
primate.
The researchers focused on the prefrontal cortex, a more recently
evolved brain region associated with abstract thought, planning, impulse
control and problem solving, and the cerebellum, an ancient brain region
involved in motor control.
“Among all developmental changes specific to the human brain, one
process — synaptogenesis — clearly stood out,” Khaitovich said.
Synaptogenesis, the foundation of learning and memory in the brain,
involves the formation of synaptic connections, strengthening useful
connections and eliminating useless connections, he explained.
In humans, peak expression of synaptic genes in the prefrontal cortex
doesn’t occur until about age five. In chimps and macaques, this occurs in
the first year of life. This human-specific change occurs only in the
prefrontal cortex, not in the cerebellum.
“Our findings suggest that the human brain remains extremely plastic
and susceptible to environmental input during the first five years of
life,” Khaitovich said. “Our study uncovers one of the important
mechanisms potentially involved in evolution of human cognition.”
More information
The U.S. National Institute of Mental Health has more about brain development during childhood and
adolescence.
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