Category Archives: Split-brain

Alien Hand Syndrome

neuravinci

Imagine cruising down the highway, wind in your hair, sunshine on your face. You have the radio on, your favorite songs are playing, and your hands seem fine. That is, until they start taking over the steering wheel and trying to crash you.

Or you are sitting in your chair and your hand is repeatedly slapping you.

This is what is can be like to have alien hand syndrome.

 

And yes, this is the disorder Dr. Strangelove in Stanley Kubrick’s movie had. In fact, alien hand syndrome is sometimes called the Dr. Strangelove syndrome.

 

One sufferer, 55-year-old Karen Byrne, developed alien hand syndrome after having her corpus callosum severed in an effort to control her epilepsy. The corpus callosum is the bundle of nerve fibers running down the center of the brain, connecting the two hemispheres so that they can communicate. Severing the corpus callosum is a last-effort…

View original post 328 more words

Leave a comment

Filed under Brain, Consciousness, Delusions, Mind, Neuroscience, Split-brain, Woo

Split-Brain Patients

neuravinci

The corpus callosum is the bundle of never fibers that connect the two hemispheres of the brain. It’s the largest single structure in the brain, with some two hundred million fibers. As a last resort for epilepsy, this bundle can be cut in a procedure known as a callostomy. When this happens, a split-brain patient can occur.

What is interesting is that these split-brain patients do not appear outwardly abnormal. There is not any indication that they have a severed corpus callosum if you saw them walking down the aisle at your local supermarket. They do not make weird facial expressions or odd gestures, they do not walk or speak ‘funny.’ They seem just like you or me.

But the evidence for their disorder abounds in the lab.

When the corpus callosum is severed, the two hemispheres of the brain, the left hemisphere (LH) and the right hemisphere (RH), cannot…

View original post 843 more words

Leave a comment

Filed under Blogs I follow, Brain, Delusions, Neuroscience, Split-brain, Woo