Although minutes of a spinning episode may induce vertigo in the healthy human, as a result of a possible perceptional plasticity, Sufi Whirling Dervishes (SWDs) can spin continuously for an hour without a vertigo perception.This unique long term vestibular system stimulation presents a potential human model to clarify the cortical networks underlying the resistance against vertigo. This study,...

Fluid mechanics plays a vital role in early vertebrate embryo development, an example being the establishment of left-right asymmetry. Following the dorsal-ventral and anterior-posterior axes, the left-right axis is the last to be established; in several species it has been shown that an important process involved with this is the production of a left-right asymmetric flow driven by ‘whirling’ ...

The aquatic oligochaete Tubifex tubifex is an obligate host of Myxobolus cerebralis, the causative agent of salmonid whirling disease. Tubifex tubifex can become infected by ingesting myxospores of M. cerebralis that have been released into sediments upon death and decomposition of infected salmonids. Infected worms release triactinomyxons into the water column that then infect salmonids. How t...

Part 2 of this work presents a numerical methodology, validated using the experimental results presented in 1, to calculate added modal coefficients submerged cylinder water both when it oscillates and rotates with whirling motion. The methodology is based on computational fluid dynamic simulations that obtain forces forced vibrate mode shapes calculated acoustic-structural analysis. Then, thes...

Vibration phenomena that might be modelled well using linear vibration theory include small amplitude vibrations of long, slender objects like long bridges, aeroplane wings, and helicopter blades; small rocking motions of ships in calm waters; the simplest whirling motions of flexible shafts, and so on. However, interactions between bridges and foundations, between wings/blades and air, between...

Dizziness, or the feeling of light-headedness or vertigo, is characterised by being in the state of unsteadiness or by having a feeling of whirling sensation. Dizziness can be induced by benign activities including spinning, state of disequilibrium to life-threatening disorders like infections, Dandy’s syndrome, Meniere’s disease, or due to psychiatric origins or due to anxiety. Various signs, ...