Neurogenic niche construction: our brain’s beginning?

A Nervous System From Half A Billion Years Ago by Ed Yong

Excerpt: “…in an earlier study, Strausfeld’s team buried marine worms in mud and put them under high pressure to simulate the start of fossilisation—and their nerves lasted while their muscles decayed.”

My comment: Thanks. This seems to link RNA-mediated neurogenic niche construction in nematodes to the prerequisite ecological and social niche construction, which are obviously nutrient-dependent and pheromone-controlled as is the socio-cognitive niche construction of insects and mammals. That eliminates mutation-initiated natural selection during half a billion years via evidence that the transition from grazing to predation in nematodes is nutrient-dependent and pheromone-controlled. For example, morphogenesis of teeth is nutrient-dependent, and the physiology of reproduction is pheromone-controlled.

Excerpts below from: “Nutrient-dependent/pheromone-controlled adaptive evolution: a model

“Clearly, however, the epigenetic effects of food odors and pheromones are involved in neurogenic niche construction as exemplified in nematodes (Bumbarger, Riebesell, Rödelsperger, & Sommer, 2013), and in flies (Swarup et al., 2013).”

“Differences in the behavior of nematodes are determined by nutrient-dependent rewiring of their primitive nervous system (Bumbarger et al., 2013). Species incompatibilities in nematodes are associated with cysteine-to-alanine substitutions (Wilson et al., 2011), which may alter nutrient-dependent pheromone production.”

Summary: These nutrient-dependent changes appear to have enabled 500 species of stickleback fish to adaptively evolve during 15,000 years. What took other species so long? In theory, they had to wait for mutation-initiated changes and natural selection, but there’s no experimental evidence for that. Experimental evidence shows that changes in species are epigenetically controlled by nutrients and their metabolism to species-specific pheromones.

About James V. Kohl 1308 Articles
James Vaughn Kohl was the first to accurately conceptualize human pheromones, and began presenting his findings to the scientific community in 1992. He continues to present to, and publish for, diverse scientific and lay audiences, while constantly monitoring the scientific presses for new information that is relevant to the development of his initial and ongoing conceptualization of human pheromones. Recently, Kohl integrated scientific evidence that pinpoints the evolved neurophysiological mechanism that links olfactory/pheromonal input to genes in hormone-secreting cells of tissue in a specific area of the brain that is primarily involved in the sensory integration of olfactory and visual input, and in the development of human sexual preferences. His award-winning 2007 article/book chapter on multisensory integration: The Mind’s Eyes: Human pheromones, neuroscience, and male sexual preferences followed an award winning 2001 publication: Human pheromones: integrating neuroendocrinology and ethology, which was coauthored by disinguished researchers from Vienna. Rarely do researchers win awards in multiple disciplines, but Kohl’s 2001 award was for neuroscience, and his 2007 “Reiss Theory” award was for social science. Kohl has worked as a medical laboratory scientist since 1974, and he has devoted more than twenty-five years to researching the relationship between the sense of smell and the development of human sexual preferences. Unlike many researchers who work with non-human subjects, medical laboratory scientists use the latest technology from many scientific disciplines to perform a variety of specialized diagnostic medical testing on people. James V. Kohl is certified with: * American Society for Clinical Pathology * American Medical Technologists James V. Kohl is a member of: * Society for Neuroscience * Society for Behavioral Neuroendocrinology * Association for Chemoreception Sciences * Society for the Scientific Study of Sexuality * International Society for Human Ethology * American Society for Clinical Laboratory Science * Mensa, the international high IQ society