Barry Komisaruk, a distinguished professor in the department of psychology and associate dean of the graduate school at Rutgers University, submitted the trio's concerns in a journal commentary.
Komisaruk, a behavioral neuroscientist, said the study author made vastly unwarranted conclusions from a single tissue sample without performing appropriate scientific tests. For all anyone knows, he said, rather than locating the G-spot, Ostrzenski may have found a sign of disease, such as a tumor.
The study also lacked "microscopic analysis to determine if it is glandular or erectile tissue, whether the 'vessel' is a blood vessel or a secretory duct, whether the tissue has a nerve supply, and whether it is normal or pathological tissue," Komisaruk said.
"We submit that the author's claim to have discovered 'the' G-spot does not fulfill the most fundamental scientific criteria," wrote Komisaruk and his co-authors.
For claims to be taken seriously, he said, they must be backed by "dissections using microscopic and chemical analysis, in women of all ages. Not only dissections, but observations of this body region in life, using modern imaging and other methodologies, correlating with those who do or do not claim to have a 'G-spot,'" along with other research.
Study author Ostrzenski said he could only speculate as to why nobody had made the discovery before him. "The location of the G-spot is quite deeply situated and maybe that is the reason," he said. "The second aspect is that the vagina exists in separate layers and surgery is usually performed on the upper part."
Besides his own work, Ostrzenski said that genetic findings, studies of vaginal electrical activity and centuries of descriptions from women support the G-spot's existence.
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