Movement illusion

When this gratuitously titled machinery is set into rotary motion, the striped and displaced circles appear to undulate. This movement produces a hypnotic illusion of pulsating depth, or what Robert Lebel poetically called a screen for suggestive metamorphosis. Fascinated by this quirky optical experiment, Duchamp (especially in 1926) created a number of substitute disks decorated with either spiral-linear and colored patterns, many of which included similarly inscribed onomatopoetically, pseudo-emblematic patterns (see MD-125, MD-126, MD-135, MD-139). These motorized illusionistic doodles continued in production, culminating eventually in 1935, with the editions of some 1500, flat cardboard disks, collectively called the Rotoreliefs (MD-144). Another approach in this direction of rotary symbolism was represented in the 1926 film Anemic Cinema (MD-140), where spirals alternate with puns inscribed within slowly turning disks. ... 

One significant limitation of such reductionistic models lies in their inability to reveal the dynamic nature of the systems they portray. These models describe artificial conservative states with no revelation of dynamic transactions and alterations of states. Of course the illusion of movement can be graphically fabricated by collectively changing the coordinate frame, but the transactions within the system are still unaltered. While useful information may be derived from such models, it is imperative that their genesis be well known to the drug designer. 

A possible link between the movement of the eyes (which is real) and the hallucinated dream movements (which are fictive) is provided by the PGO system. This is because the neuronal firing patterns associated with each PGO wave encode (at least) the direction of the eye movements and provide that encoded information to (at least) the visual thalamus and visual cortex. This means that in the absence of real sensory input from the eyes, feed forward information about the direction of the (also fictive) gaze is provided to the upper brain, which could (and we think almost certainly must) use it in the elaboration of the convincing visuomotor illusion that is dreaming. 

Frotein crystal structures may entice the illusion that the individual atoms in a protein are at fixed positions. However, substantial movements do occur. For instance, the C-terminal domain of protein R2 is too mobile to be resolved in the crystal structure. In solution even larger flexibility is... 

ACUTE HEALTH RISKS headache, vertigo (an illusion of movement) irritation of... 

HEALTH SYMPTOMS inhalation (nausea, illusion of movement, yellow jaundice) skin absorption (fatigue, liver damage) contact (chloracne, acute eczema, irritates eyes). 

Rhythm is the term used to describe the illusion of flow or movement created by having a regularly repeated pattern of Lines, planes, or surface treatments. 

Just as Perrin concluded that a fluid s apparent repose is merely an illusion because the fluid molecules are in a state of eternal and spontaneous motion, so must we believe that all molecules adhere strongly, even though macroscopic objects appear nonsticky. The apparent lack of adhesion we see in engineering situations is really an illusion because adhesion is universal at the molecular level, according to the first law of adhesion above. However, there is a serious conundrum here because it seems impossible that particles can be in constant Brownian movement, where it is necessary for particles to collide and bounce off each other, yet also sticking together, which would cause agglomeration and... 

Important extensions of kinetic theories to solutions followed the study of the movement of small suspended particles in a liquid, first carefully investigated by R. Brown (1828), and now called the Brownian movement. What seem to have been Brownian movements were noticed by Dutrochet but regarded as optical illusions. Brown found that particles suspended in a liquid in pollen cells are in tremulous motion . He also observed the movement with fine suspended particles of gamboge and a large number of inorganic bodies and noticed the rotation of some of the particles. He seems to have thought that the motion is due to convection currents. 

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