In any other set of twins the natural conclusion about the two events would be that Kristas drinking and Tatianas reaction would be coincidental. But because Krista and Tatiana are connected at their heads, whatever the girls do they do it together. In this case, brain images revealed that there was an attenuated line stretching between the two brains and forming a "thalamic bridge", a bridge connecting the two thalami. Knowing that the thalamus acts as a major control panel within the body, it is believed that the girls share part of this control panel and so when one girl drinks the other one feels it. This along with many other cases, has advanced social media and neurological related research concerning this kind of link between craniopagus twins. Unfortunately, no controlled studies have been done because the twins are so young and their brains are still very malleable and plastic. Although there is not an overwhelming amount of research surrounding how the union between craniopagus twins leads to different personality, cognitive and motor traits, there have been some studies exploring what it actually means to share a brain. In the case of Tatiana and Krista, it is possible that the twins shared some conscious thought. Studies of the thalamus’ role in the brain provide neurological data that help explain these behavioral observations that these two twins experience. Thalamo-cortico-thalamic circuits are the looped neural pathways that connect the thalamus to the cerebral cortex, and then the cerebral cortex back to the thalamus.
losing consciousness instantaneously, using chloroform. Safety
Exposure
Chloroform is known to form as a by-product of water chlorination along with a range of other disinfection by-products and as such is commonly present in municipal tap water and swimming pools. Reported ranges vary considerably but are generally below the current health standard for total trihalomethanes of 100μg/L. Nonetheless, the presence of chloroform in drinking water at any concentration is considered controversial by some.Historically, chloroform exposure may well have been higher due to its common use as an anesthetic, as an ingredient in cough syrups, and as a constituent of tobacco smoke where DDT had previously been used as a fumigant. Pharmacology
It is well absorbed, metabolized, and eliminated rapidly by mammals after oral, inhalation, or dermal exposure. Accidental splashing into the eyes has caused irritation. Prolonged dermal exposure can result in the development of sores as a result of defatting. Elimination is primarily through the lungs in the form of chloroform and carbon dioxide; less than 1% is excreted in the urine.Chloroform is metabolized in the liver by the cytochrome P-450 enzymes, by oxidation to chloromethanol and by reduction to the dichloromethyl free radical. Other metabolites of chloroform include hydrochloric acid and digluathionyl dithiocarbonate, with carbon dioxide as the predominant end product of metabolism.Like most other general anesthetics and sedative-hypnotic drugs, chloroform is a positive allosteric modulator for the GABAA receptor. Chloroform causes depression of the central nervous system (CNS), ultimately producing deep coma and respiratory center depression. When ingested, chloroform caused symptoms similar to those seen following inhalation.