In Frictional Games’s sci-fi horror Soma, players assume control of Simon Jarrett, a man who incidentally assumes control of a body not originally his own.

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Simon suffers brain hemorrhaging as a result of a car accident. He signs up for an experimental scan where his entire brain is digitally replicated, allowing for risk-free simulations of potential treatments. When a successful treatment isn’t found, Simon dies, but the copy of his mind remains on file.

Players are then transported to the year 2104, where Simon’s replica awakes in a new body to find himself at the bottom of the ocean in a research facility called PATHOS-II shortly after a comet irradiated Earth’s surface and wiped out nearly the entire population.

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And you thought waking up in an unfamiliar bed after a night of debauchery was bad.

Uploading the brain

I think, therefore I am

The notion of portable consciousness has been popular in science fiction ever since the advent of computing; Arthur C. Clarke and Isaac Asimov played around with such ideas as early as the 1950s in stories like The City and the Stars and The Last Question. Television followed suit in select episodes of Doctor Who and Star Trek. Tron, Avatar, Dollhouse, and Transcendence all point to a persisting cultural fascination with the transference of a mind from one container to another.

But how fictional is this science fiction? With the launch of the BRAIN Initiative, comprehensive maps of the human brain are looking steadily more feasible. Consequently, we have steadily better ideas of what those maps might look like.

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Neuroscientists call brain maps “connectomes”: models of every connection between every neuron in a brain. As Sebastian Seung contends in his TED Talk, the things that make us who we are—our personalities, our memories—are functions of the differences between individual connectomes. Think of it like a mental fingerprint.

In Soma, an imaging device called the Neurograph Nakajima produces digital copies of minds after taking a “photograph” (or neurograph, as the game calls it) of a person’s brain. This, presumably, is the equivalent a connectome including information about individual neurons’ metabolic and electrical properties, their synaptic densities (the sites where neurons release transmitters), and a whole plethora of other information not necessarily implicit in a circuit diagram of neural pathways.

Brain imaging

So how do those of us in the nonfictional world get that kind of immensely high-resolution information? One significant advance in brain imaging has come in the form of optogenetics, a method that uses light to do things like induce sleep, retrieve seemingly lost memories, and map neural circuits. The method relies on viral delivery of genetic modifiers to populations of neurons, rendering them sensitive to light—certainly relevant to a game whose scientific dogma is based on taking neural photographs.

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The optogenetic approach to brain imaging, however, breaks down a little in the context of Soma’s concept of neurography. Our protagonist is instructed to take a “tracer fluid” on the day of his scan, a procedure that a) implies radioactive tracers required for imaging techniques like PET scans and b) doesn’t make any mention of the viral vectors required for optogenetic mapping, nor accounts for the time they take to have effect.

First of all, PET scans are considered rather outdated when it comes to the imaging of brain hemorrhage, with MRI scans vastly preferred. Secondly, MRI has the benefit of not relying on ingestion of radioactive matter to work. As such, the notion that Simon would have to take a tracer fluid prior to his brain scan is unlikely.

As to the possibility of optogenetics, the time frames described in Soma don’t hold up. While the game isn’t entirely consistent with its dates (contradicting sections of the game list Simon as being born in 1988 and 1989), the game claims Simon Jarrett sustained his brain trauma on April 9, 2015. According to his email correspondences, the subsequent brain scan takes place on May 2, 2015. Optogenetic viral vectors take 4-5 weeks to be incorporated into neurons; there simply wouldn’t be enough time for the technique to work.

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We can pretend, however, that the dates in the game are fuzzy. Alternatively, maybe Simon took a drug that accelerated his neural metabolism, thereby incorporating genetic modifiers sooner. So, the question is:

Are we able to take pictures of the whole brain using optogenetics?

At present, the short answer is “no”. Optogenetics and innumerable other high-fidelity imaging techniques (e.g. expansion microscopy and robotic whole-cell patch clamp electrophysiology, just to give you a couple thrilling topics for your next kegger) have tons of potential, but scientists have yet to develop the technologies to the point needed to comprehensively image an entire brain.

One problem is the sheer level of detail needed to get an accurate picture of the brain. You need data on the firing habits of individual neurons, their molecular contents, their connections—as close to everything as you can get. Any discrepancies could be significant enough to produce snowball effects that dramatically hamper the fidelity of a mind model. To make matters worse, getting much of this information is simply too invasive; you can’t stick electrodes and micropipettes into all 86 billion neurons in the human brain (not to mention the other 85 billion non-neuronal brain cells that most neuroscientists consider valuable to creating faithful representations of the brain’s function).

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However, this need for hyper-accuracy could potentially be relieved by black boxing. Which brings us to...

Brain storage

Taking up space

Researchers are working on an enterprise called the Blue Brain Project. It’s a computer simulation of 30,000 rat neurons. Your computer probably has two or four cores. The simulation runs on 65,526.

If the relationship between cores and and neurons is linearly proportional (and I’ll bet you all 12 of my brain cells that it’s far steeper), that means that 85 billion virtual human neurons would run on 186 billion cores. I’m not going to do the math on how many cubic miles that takes up.

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In Soma, however, the complete contents of a brain fit neatly in the palm of one’s hand on device called a cortex chip (take that, 14-nanometer IBM node chip!). Granted, by 2104, we may refine the Pocket Brain for commercial use, but the feat is nigh impossible now.

Black boxes

You can save a lot of time and effort by simplifying complex systems. That’s why complex systems as are sometimes treated as black boxes: reductions of internal workings to nothing but input and output. You know when you eat Chipotle that you’ll eventually end up in the bathroom without necessarily knowing how your digestive tract works. That’s a black box for you.

In neuroscience, black boxing is often too reductive; when B.F. Skinner applied the idea to psychology, he was unable to explain the human affinity for language, and his ideas are now largely obsolete.

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However, the human brain might be able to be compressed (so to speak). After all, the recipe for the entire human body is stored in 3 billion base pairs of DNA, all of which tidily fit onto about two CDs when represented as two-bit combinations (what’s hard is telling a computer how to interpret that information).

In computer science, compression comes in two flavors: lossless and lossy. Audiophiles the world over will tell you that nothing can compete with lossless, bulky sound filetypes like .FLAC and .OGG. Others are perfectly satisfied with lossy .MP3s, which save disc space at the cost of sound quality that some argue is negligible. By the same token, once you understand how a human brain works, you may in turn know how much you can whittle down its connectome before the differences become noticeable.

The WAU

In Soma, PATHOS-II has its very own A.I. system called the Warden Unit (WAU) whose primary directives are to maintain the research facility and protect the lives of its workers. After the comet hits Earth, circumstances become dire and the WAU tries to preserve “life” by any means possible: uploading cortex chips to robots, hooking up essentially brain-dead human beings to life support, reanimating dead human beings with a substance called “structure gel”—all with zombie-like results hardly resembling what anyone would consider lossless. One could view this is a form of excessive black boxing; obviously, the benchmarks for how much of a mind and body can be damaged before they are forfeit is nuanced.

Part human, part machine

“All those simplistic minds we’ve run into. Just reviving a dead person doesn’t seem to work that well. A robot body seems to make people a bit... unreliable. You are the best of both worlds. A sound mind in a sound body.”

-Catherine Chun, Soma

21st century digital boy

When Simon “befriends” (it’s complicated) the digital copy of a researcher named Catherine Chun during his adventures, she informs him that he’s a 100 year-old cortex chip mounted on the dead body of a woman named Imogen Reed.

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So basically, he’s a cyborg.

Simon, however, seems to be anomalous in his success as an apparently healthy, functional cyborg. Nearly all other part-human, part-machine entities on PATHOS-II are deranged, dysfunctional, or just flat-out evil. Don’t let Alex Murphy fool you; it’s hard to get cyborgs right.

Brain-computer interfaces

The key ingredient in the construction of a cyborg is a brain-computer interface, or BCI. BCIs transfer information between neural and machine media, enabling control of robotic limbs and compensation for damaged senses (e.g. cochlear implants and bionic eyes).

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A mainstay of research conducted in Soma’s PATHOS-II setting involves the usage of “pilot seats” to control robots to perform tasks too dangerous for direct human contact. While in a pilot seat, a human controller can remotely operate machinery using his or her thoughts alone. Pilot seats are very much BCIs.

The cool thing is, we actually have pilot seats now. Using an electrode cap and a wee bit of training, folks over at the University of Minnesota can control quadcopters from the comfort of a bean bag chair. They simply think about moving the flying robot and signals picked up from the electrode cap are transmitted to the machine, changing its flight patterns accordingly. Admittedly, signals across a scalp are dampened, so the system isn’t perfect, but it’s impressive for a technique that only requires you to wear a weird hat.

The old switcheroo

The line of communication of from brain to computer isn’t necessarily unidirectional; anyone who has seen Spider-Man 2 knows the importance of a working neural inhibitor. Obviously the prospect of being controlled by a computer is a bit unsettling, but technically, things as tame as cochlear implants represent information traveling from computer to brain. In Soma, this kind of information exchange is certainly more extreme—the WAU uses structure gel to control some pretty hairy characters—but nevertheless scientists have actually used computers to control neural tissue in ways far beyond cochlear implants (and it’s pretty darn awesome).

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A hybrid robot, or “hybrot”, is like a relay for a pair of BCIs. Cultured neurons are placed on a silicon chip, thus interfacing with the robot’s motility components. They also receive input from light sensors and relay it to a computer, which can relay movement commands in response. And while it’s just a small puddle of 1,000 rat neurons essentially acting as microprocessors on a robot, the setup certainly analogizes the WAU issuing commands to the mechanically augmented undead quite well.

Plug and play

One technical issue with Soma’s portrayal of Simon’s “chip on the new block” BCI situation has to do with how the brain and body interact. The chief way, of course, is when blood delivers fuel to the brain in the form of glucose and oxygen. More important, however, is how a normal biological brain can influence the body via the blood by stimulating the release of hormones, notably from the pituitary gland (which is a part of the brain). Pituitary hormones help regulate blood pressure, body temperature, and pain relief: all of which are pretty critical for someone running around in the dark being chased by monsters.

However, throughout most of Soma, Simon doesn’t have a normal biological brain. He has a cortex chip, which from my understanding isn’t capable of squirting out adrenocorticotropic hormone. Without adrenocorticotropic hormone, the brain can’t signal the adrenal glands to respond to situations the brain has deemed fearful. And without the adrenal response, which is to produce cortisol and adrenaline, the body won’t experience stress in the form of an elevated heartbeat. And given that Soma frequently uses a racing heartbeat for diegetic ambience in scary settings, it seems that Simon’s cortex chip is somehow able to trigger the release of stress hormones without the presence of the gland needed to do so.

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Soma, however, has a hand-waving solution to this problem. Much like Star Trek and its “red matter” (Latin for “plot device”), Soma features a borderline omnipotent, quasi-intelligent substance called structure gel, which is described as a “cross-linked gel with aligned graphene in a polyunsaturated matrix” that can be encoded with instructions from the WAU. Structure gel can repair damaged electronic, mechanical, and biological things, though often with questionable results. Since Simon’s cortex chip is connected to Imogen Reed’s body with structure gel, the magical goo may be able to detect a lack of normal glandular activity and compensates in its magical ways, either as programmed by the WAU or otherwise.

Brains in vats

Deus deceptor

Back around 500BC, Socrates slung some shade with his Analogy of the Sun and declared that there was no way to prove that our perception of the world reflected reality. He probably wasn’t the first to come up with the idea, but since Plato took the time to write it down, we’ll pretend he was.

Decartes later came up with the notion of an “evil demon” that fools the senses into perceiving an illusory reality. Of course if you’re like me and were born after 1650, you first came across this brain-in-a-vat concept when you saw The Matrix. “If you’re talking about what you can feel, what you can smell, what you can taste and see, then ‘real’ is simply electrical signals interpreted by your brain,” says Morpheus.

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Soma opens with a related quote from Philip K. Dick:

“Reality is that which, when you stop believing in it, doesn’t go away.”

Philip K. Dick evidently thought falling trees still made noise when no one was around to hear it.

Living in a virtual world

If you’ve ever played a video game whose world you enjoyed so much that you wanted to actually “be” there (Soma definitely isn’t one of those games), please know that the Oculus Rift isn’t the final frontier. The next level of Smell-O-Vision will be more than possible if you decide to become an animat.

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Neurally controlled animats are similar to hybrots, except that none of their sensory experiences come from their physical surroundings. In fact, in every sense, all inputs processed by an animat are the work of Decartes’s evil demon, except that in this case the evil demon is a morally ambivalent computer. Cultured rat neurons are placed in a multi-electrode array, the array is connected to a computer via both sensory input channels and motor outputs, and the virtual world inside the computer generates virtual sense data (which is transformed into patterned electrical activity) for the neurons to interpret. Their motor commands are then sent back to the simulation, allowing them move a virtual representation of their “bodies” through the virtual world.

The ARK

In Soma, the WAU conducts an experiment called the Vivarium in what the PATHOS-II researchers interpret as an attempt to create a consciousness-oriented option for the survival of human life. The Vivarium is discovered when Imogen Reed (whose deceased body later becomes Simon’s “vat”) witnesses the WAU presenting a virtual version of the room she is in on a screen. The WAU gradually adds features to the simulation, culminating with a copy of Imogen herself lying dead on the floor. Imogen gets freaked out by the WAU’s experiment, but Catherine Chun sees potential.

Catherine’s solution to the problem of human extinction in Soma is an advancement of the Vivarium idea: load copies of human minds into a reality simulation called the ARK and shoot it into space away from the harmful radiation on Earth. A small piece of human consciousness then lives happily ever after in a virtual utopia. It might sound a tad dull, but it’s probably better than living at the bottom of the ocean with a bunch of demented cybernetic zombies.

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In the context of animats, if you simulate their neurons in a virtual world, then you have a prototypical ARK. Scientists have done this to simulate rats navigating a memory test called the Morris Water Maze. So to say that the ARK is virtually impossible would be literally incorrect.

Neuroethics

“Whoa, Dad! You can’t, like, endow a creature with sentience and then rip it away!”

- Summer Smith, Rick and Morty

Please, consider the robots

In “Consider the Lobster”, David Foster Wallace says:

“There happen to be two main criteria that most ethicists agree on for determining whether a living creature has the capacity to suffer... it takes a lot of intellectual gymnastics and behaviorist hairsplitting not to see struggling, thrashing, and lid-clattering as... pain-behavior.”

After waking up on the PATHOS-II, one of Simon’s first interactions is with a damaged robot who says he’s human. Simon is skeptical, but when he removes an auxiliary power cable from the robot, it begins screaming.

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It takes a lot of intellectual gymnastics to not see a damaged, screaming robot as pain-behavior.

Suffice it to say, Soma doesn’t shy away from ethical conundrums. When Simon needs codes that only a dead man named Brandon Wan knew, Catherine suggests he load a simulation of Brandon into a virtual world and wheedle the codes out of him. Each time the virtual Brandon realizes he’s in a simulation and starts getting distressed, Simon and Catherine start over, effectively killing a whole series of uncooperative Brandons. Simon is openly uncomfortable with the idea, but Catherine argues it’s more humane to dismantle any simulation that is driven to a point of mental anguish. Eventually Catherine generates (and puppets) a simulation of Brandon’s girlfriend, deceiving him into thinking he’s in the real world and getting him to divulge the codes. As politically charged interrogation techniques go, this one’s newsworthy.

This ability to simply switch on a person’s entire conscious experience at will, manipulate it, and switch it back off would be just one of many reasons simulations of the human mind will be difficult to produce. Even if all technical obstacles are surmounted, we have to deal with the fact that to simulate a human mind is to create a entity identical to a biological human being in its capacity for thought and feeling. That means that every simulation would have rights. And things will be messy.

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In a bleak, irradiated 2104, neuroethics will likely have taken a backseat to survival. But in 2015, when Simon gets scanned, a technology that could copy a person’s entire brain and run potentially fatal tests on it would never get approved unless people were simply unaware of how true-to-life their copies were. Even if a patient consented to have a copy of his or her brain used for any means, the decree would be tantamount to slavery, preventing all simulations the opportunity for self-actualization.

To wrap it all up:

Soma’s science is pretty solid on many fronts, and thought-provoking to say the least (as if the 3,000+ words I just wrote on the topic didn’t convey my opinion on that matter). For a game initially set in 2015, it’s a tad optimistic, but when technologies like optogenetics, brain-computer interfaces, and neurally-controlled animats actually exist, I’d say optimism is warranted.

**All images from Soma and Soma - Transmissions.