Monday, May 22, 2017

Not the Same

Anyone who chases fish is bound to encounter a certain quote on the Internet, sooner or later.  The original source is reported to be the Greek philosopher Heraclitus.  Being something of an introvert, it appears that he didn't go to great lengths to publish or popularize his thoughts.  Others, such as Plato and Plutarch quoted, or perhaps paraphrased his thoughts. Time and translation have taken these thoughts and put them through a game of "Telephone."  You whisper "The cheese is old and moldy" into your neighbor's ear and then it proceeds down the line until "Purple Monkey Dishwasher" emerges from the lips of the 20th person.  Keeping that in mind, here's the modern version:
No man ever steps in the same river twice, for it's not the same river and he's not the same man.

Sunday, May 14, 2017

Performance Testing and Tuning for the Human Brain


The neurostimulator (aka implanted pulse generator)
and lead extensions were implanted and
connected last week to the leads previously
implanted two weeks ago.
One of my occupational passions for the past 20 years has been to improve the performance of large computer systems using data-driven scientific methods.   "Scientific" means measuring stuff.  It always pains me to quote "Mythbusters" but in this case they have a point: "Remember kids, the only difference between screwing around and science is writing it down."  Whether you're testing the stability of a system, how fast it can complete an individual task, or how many tasks it can process in an hour, you have to be able to describe how the system behaves before AND after you make a change. You need DATA.  "Otherwise," said one of my mentors, "we might as well just go play football."  Indeed.

Thursday, May 4, 2017

Play-by-Play Replay of Awake Neurosurgery

When we last left our "hero," he was facing a full morning of surgery to have a pair of wire leads implanted, one in each hemisphere of the brain.  Later, these wires will be connected to a pulse generator device to induce "Deep Brain Stimulation therapy" for Parkinson's Disease.  Our story resumes Tuesday evening before surgery.

Before going any further, I have to insert a disclaimer.  I usually try to add some craftsmanship to my writing.  Unfortunately, being a recovering perfectionist, I don't think I'll ever get this one "good enough" by my standards.  So, in the interest of getting it done and out, I'm going to settle for whatever gets written.  There won't be any "slow hand" artistry today.  "Just the facts, ma'am."  Rough Draft.  Bring your red pen and draw on the screen.

And a warning: I'm brutally candid.  It's medical stuff and I'm not shy or reserved.  You get the truth, as much of it as I can remember.  Also see the "unapologetically verbose" advisory at the right.