"The human brain has 100 billion neurons, each neuron
connected to ten thousand other neurons. Sitting on your shoulders
is the most complicated object in the known universe."
--Michio Kaku
"Everything we do, every thought we've ever had
is produced by the human brain. But exactly how it operates
remains one of the biggest unsolved mysteries."
--Neil deGrasse Tyson
Copyright © 2023
By Ralph F. Couey
We plow through each day, tackling problems, creating solutions, remembering, and predicting. We calculate numbers, the intentions of others, all happening in that incredibly complex thing inside our head.
The human body, with all the things it has to do, is a wonder of engineering, and it's easy to take it for granted. We don't have to think about making our heart beat, or breathing, it does it by itself. But of all the parts of us, I would say that our brain is the one thing we most often take for granted.
Last week, at the behest of my doctor, I submitted myself for an MRI of my brain. Magnetic Resonance Imaging is one of those miraculous devices that allow doctors to peer inside the human body without doing what used to be called "exploratory surgery." The device uses strong magnetic fields and radio waves to generate images of human organs. According to Wikipedia, the response of hydrogen nuclei in human tissues are separated from other nuclei by the magnetic field resonating at the hydrogen frequency. To make a long story short, that resonance allows images to be captured, one slice at a time. This gives the doctor the ability to closely examine the organ from the inside out. This has enabled the early diagnoses of a wide range of dangerous conditions, thus saving countless lives.
I've had a few of these before, so I knew what to expect. After changing into a gown and carefully ridding myself of anything metal, I was taken into the room and laid on the bed. Over the years, these beds have become much more comfortable, avoiding the annoyance of back muscle cramps. After a period of instruction and insertion of earplugs, I was slid into the device.
I've been claustrophobic in the past, but I was given a kind of mirror that allowed me to look out into open space, and not at the curved shell inches above my nose. Plus, having lost a lot of weight means I don't fill the tube like I used to. There was a nice cool breeze flowing through the tube which helped a lot. In fact, I was so comfortable, I fell asleep, even with the TONK TONK TONK going on around my head.