In 350 BC, Aristotle goes against Hippocrates, correlating sleep to consumption. He claims the transference and conversion of foodstuff into the body produces fumes that filter up and remove heat from the brain, at which point we nod out. Sleep then ends when digestion has been completed: a cycle based on the nature and the volume of what is taken in.
Six hundred years later, Galen of Pergamon synthesizes the self as fleshy system and dreaming as a reflective transcendental presence. He writes: “For it is likely that in sleep the soul, having gone into the depths of the body and retreated from the external perceptions, perceives the dispositions throughout the body and forms an impression of all that it reaches out to. .. For those who have this impression that they are passing time in dung and mire either have their internal humors in bad condition, foul-smelling, and putrid, or they have an excess of dung encompassed in their bowels.”110 Sleep for some therein becomes a developer of guilt, a window into their nothing that might bring them embarrassment, or fear. The function flutters in a silence.
For the most part, among these early ideas of what its shape might be, sleep as a function passes unexplored. Night goes on in silence, riding blankly. The flesh contains itself.
It’s not until the seventeenth century that Descartes outlines a theory updating Aristotle’s, a “hydraulic model” in which sleep arrives when the pineal gland ceases holding the brain up from the inside. During waking hours, the brain is filled with animal spirits that give it volume; when these spirits dissipate inside the flesh, the pineal makes the brain’s ventricles collapse and we fall asleep via the absence of our primordial forces, somewhat like an inverse model of the male erection.
Soon after Descartes, Thomas Willis and Thomas Sydenham begin to outline troubled sleepers’ inherent neurological symptoms, including nightmares, restless legs, and the accelerative effect of drinking coffee. Sydenham in particular ties the recurring condition to an act determined by the actions of the self, which he considers unique from the acute.
People of this era are urged to smoke opium and kill witches. Epidemics spread. Interest grows again in bloodletting, and in careful control of one’s diet. Some speak of spirits or poltergeists that might occupy the body and thereby snake into the mind: formless presences attached to earth locations, patrolling air. More houses have more doors.
In 1623, “insomnia” is first termed, from Latin: in (not) somnus (sleep). Rather than its negation, the state is simply anything the other thing is not — the ongoing world surrounding. In his English-language dictionary, Henry Cockeram defines: “Insomnie. Watching, want of power to sleepe.” This want comes among a growing league of other surrounding wants. There is more now to watch and clamor for than ever. Soon, too, there will be more more. There will be.
In 1757, Frenchman Robert-François Damiens is tortured and eventually drawn and quartered for his unsuccessful attempt to assassinate Louis XV. In the midst of his handling, which includes red-hot pincers, sulfur burning, and molten lead poured into open wounds, Damiens claims his greatest anguish is not the burning or beating, but his being deprived of sleep.111 His life ends with him looking on the removed parts of his body, screaming, “Kiss me, gentlemen!” at his dispatchers, and calling on the name of god.112
In 1772, oxygen is discovered, a shared blanket wrapped around the earth. Plants are found to have biological rhythm, opening and closing with the light, which then affects our view of our own bodies. Atrophy is recognized in muscles. Dreams are thought of as disease. Some find respite in mesmerism, mirroring the sleep state inside the waking self, turning open to implanted suggestion, or to visions. Someone invents quinine, the telescope, the pressure cooker. Smoke rises off of things. Electricity is found to exist not only in the air outside the body, but moving through us.
We get artificial teeth. We get circular saws, steamboats, and carbonated water. Lenses in split frames help us to better see each other, anywhere.
In 1781, Kant conceives the disintegration of the self owned by the self, claiming: “Consciousness of self according to the determinations of our state in inner perception is merely empirical, and always changing. No fixed and abiding self can present itself in this flux of inner appearances… [Thus] there must be a condition which precedes all experience, and which makes experience itself possible.”113 There is something, then, it could be said, lurking inside us, many kinds of something, perhaps, modes that make us who we are, though we have no clear title for it or way to place it.
Regardless, in 1790, we get the U.S. Patent Act, allowing each object in creation a number and a name, its purpose tendered, tallied, and on file for commoditization.
In the nineteenth century, we get local anesthesia. We get the revolver, kaleidoscopes, gas stoves and bikes, the tuning fork. Photography teaches us to pose in ways we want to remember, captured just that way, replicating among a light. Landscapes and houses appear doubled in our images behind us. Some see the pin-sized hole of the camera’s eye as a magic conduit of Satan, though this most of us will learn to disregard. Machines are replicating also, customizing to our more and more particular kinds of needs.
Water beds are invented to help prevent bedsores in invalids. The stethoscope allows us to listen in on what’s been going on inside us all this time: sounds we mostly haven’t located in our bodies before, except sometimes at night, when with our heads pressed into the beds we hear the reflection of our heartbeat, the breath around our heads.
In the new light, of sick people, we become aware of the spreading of unseen cells. These cells are given names. They’ve been here all this time surrounding, begetting our disease. People die now for reasons we can more aptly put a face to. We use their death to inform the growing duration of our lives. We learn surgical operation, opening flesh. We get the telephone, the typewriter, ice cream, and badminton, and these too are not enough, and we make more.
In 1795,114 Johann Blumenbach becomes the first person to actually observe the brain of someone who is asleep. He finds that in this state the brain is paler than at other times, thus suggesting, to him, that sleep is caused indeed by blood flushing to the skull. Various vascular theories, including those by Alcmaeon, von Haller, and Boerhaave, all revolve again around Hippocrates’s idea of sleep as related to the flow of blood. Luigi Rolando cuts the cerebral hemispheres from birds and finds the creatures then become perpetually sleepy. Further research is performed on subjects with fractured skulls: “When she was in deep sleep the organ remained motionless beneath the crest of the cranial bones. When she was dreaming it became somewhat elevated and when she was awake it protruded from the fissure in the skull.”115
Thirty years later, Robert MacNish says it’s more about the blood’s brain pressure than about the flow. Another dozen years and Johannes Purkinje says that in sleep the brain’s corona radiata become pressed upon by blood-cell congestion in the basal ganglia to the point neural expressions are cut off, thus suggesting sleep is more like a mode of cerebral blockage than an emptiness, mere drain. In 1865, John Jackson finds that the flesh of the eyes also go gray in sleeping, and therefore suggests sleep is not a result of the brain’s loss or gain of mass of skullheld blood at all. A guy named Hammond comes back and says sleep is more like an anemia, the decrease of hemoglobin. Theories by Fleming, Donders, Durham, Howell, and Hill continue to support the concept of sleep as the product of the blood’s evacuation, though they disagree on where this blood goes when it leaves the brain. More and more people publish papers containing their own tailored projection, flailing new thought into the light. In the meantime, we get celluloid, allowing cheaper, quicker, better replications: the replications are replicating.