amputation
dr. dolittle | April 30, 2016 Image of brittle star by Jerry Kirkhart from Los Osos, Calif. [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
A new study published in Frontiers in Zoology examined the developmental process involved in regulating limb regeneration in brittle stars (Amphiura filiformis) following amputation of an arm. Limb regeneration is a multi-stage process involving initial healing and repair of the wounded site, initial growth of the limb followed by development of more complex layers of cells until ultimately the limb has been fully regenerated. Understanding this…
dr. dolittle | November 13, 2014A reader sent me the following question:
"How does a lizard grow a new tail?"
This was a very timely question as new research has shed light on this very phenomenon. A team of experts at Arizona State University led by Dr. Kenro Kusumi and colleagues have been studying limb regeneration in lizards.
Green anole lizard (Anolis carolinensis) with tail a new tail (image credit: Hutchins et al./PLoS ONE)
The green anole lizard (pictured above) can lose its tail when captured by a predator. They are then able to regrow their tails, although they do not look quite like the original. Dr. Kusumi'…
oracknows | October 16, 2013This being Breast Cancer Awareness Month and all, stories about breast cancer are frequently sent my way. This one is depressing and sad, mainly because it's the story of death from breast cancer. From what I can gather, it is the story of a death from quackery, a death that didn't have to occur. Even worse than that, it appears to be a death facilitated by the daughter of the deceased, a woman named Jessica Ainscough, who bills herself as the "Wellness Warrior." It's a horrifying story, the story of a woman who followed her daughter's lead and put her faith in the quackery known as the…
cmonforton | September 16, 2011[Update (10/11/2011) below]
Phyllis Zorn of the Enid (OK) News and Eagle reports that the employer of the two teenage workers who lost legs last month in a grain auger failed to maintain workers' compensation insurance. She writes:
"Oklahoma Department of Labor has fined the company $750 for failing to comply with workers' compensation law, the maximum fine allowed in the scenario under current law. 'Zaloudek Grain Co. had not carried workers' compensation insurance for the five months prior to the accident,' Labor Commissioner Mark Costello said. 'Zaloudek had obtained workers'…
cmonforton | August 18, 2011The two 17 year old workers who were entangled two weeks ago in a grain auger remain hospitalized in the OU Medical Center in Oklahoma City. Family and friends of Bryce Gannon, 17 and Tyler Zander, 17 created a Facebook page, "Prayers for Bryce and Tyler," that provides a glimpse of the long road of recovery ahead for them. Both suffered amputation injuries to their legs. The Facebook posts suggest that the two young men have undergone multiple surgeries to treat their wounds and identify potential sources of infections. A post on Monday, Aug 15 reported:
"Tyler's surgery to clean his…
neurophilosophy | March 27, 2009If someone told you that they wanted to have a perfectly good leg amputated, or that they have three arms, when they clearly do not, you would probably be inclined to think that they are mentally disturbed. Psychiatrists, too, considered such conditions to be psychological in origin. Voluntary amputation, for example, was regarded as a fetish, perhaps arising because an amputee's stump resembles a phallus, whereas imaginary extra limbs were likely to be dismissed as the products of delusions or hallucinations.
However, these bizarre conditions - named body integrity identity disorder (BIID)…