Posts Tagged PVS

The Primo Vascular System: The N-rays of Acupuncture?

Is this a PVS structure or something else?

Is this a PVS structure or something else?

Acupuncture meridians and acupoints are imaginary until proven otherwise. Anatomists have never been able to detect them by microscopy or autopsy, and they are not mentioned in anatomy textbooks. For decades, acupuncturists have been trying to prove that their pre-scientific belief system is grounded in scientific reality. Now they are telling us that acupuncture meridians and acupoints have been discovered in the form of the Primo vascular system (PVS). A typical website trumpets “Science Finally Proves Meridians Exist.”

The available information is confusing.

Primo vessels were supposedly missed by anatomists because they are so small. They are reported to only be visible by electron microscopy, yet researchers have used dye to show them under a regular microscope. There has been speculation about their involvement in cancer metastasis: one paper provides images of a putative PVS cancer metastasis thread afloat in a lymph duct.  PVS vessels are said to be too tiny to study by the usual methods of science, but some researchers say they have somehow learned that they are characterized by high resistance and low capacitance. They are allegedly studded with electrically charged nodes that attract nutrients, oxygen, and regulatory hormones. They allegedly transmit energy to organs and integrate the features of the cardiovascular, nervous, immune, and hormonal systems and serve as the physical substrate for acupuncture points and meridians. (more…)

Posted in: Acupuncture, Basic Science

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Man in Coma 23 Years – Is He Really Conscious?

I don’t know. The mainstream media is doing a wonderful job sensationalizing this case, presenting it without skepticism. Some outlets are doing a good job of discussing the relevant issues – but they don’t have the information to have a meaningful discussion of this particular case. Details are tantalizing but thin.

The case is that of Rom Houben. The story was broke, as far as I can tell, by the Mail Online – yes, that is a huge red flag. It does not make the story wrong, it just doesn’t instill in me confidence in the reporting.

Mr. Houben was in a terrible motor vehicle accident 23 years ago and has been paralyzed ever since. His diagnosis has been PVS – persistent vegetative state. However, recently, we are told, his mother insisted on a neurological re-evaluation. This is actually quite reasonable, generally speaking (again, without knowing specific details of this case).


Posted in: Neuroscience/Mental Health, Science and the Media

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