Objective To develop a three-dimensional study tool of the membranous labyrinth in order to study the pathophysiology, diagnostic workup and treatment of benign paroxysmal positional vertigo (BPPV). BPPV is the most common cause of peripheral vertigo. Its diagnosis and treatment depend on an understanding of the anatomy of the vestibular labyrinth and its position relative to the head. To date,...

In this, our second temporal bone installment, we will emphasize the vestibular portion of the labyrinth, that relating to balance and equilibrium. Before proceeding, we must again remind the reader of the basic structure of the labyrinth: an inner membranous labyrinth (endolymphatic) surrounded by an outer osseous labyrinth with an interposed supportive perilymphatic labyrinth. We recommend pe...

Abstract In this research, the models of Inflatable weirs with internal pressures 0.5 and 1.4 at three heights 0.15, 0.2 0.25 m were constructed. The deflectors used in two geometric sections, including rectangular triangular shapes, they installed angles 30, 45, 60 degrees downstream weir body. results showed that value Cd changes between 0.28 0.35 while range ratio upstream flow head on crest...

The ant in the labyrinth: random walks and percolation – p.

ABSTRACT Fish traps and fish weirs built by Indigenous people in the Barwon‐Darling River system of Murray Darling Basin (MDB), south‐eastern Australia, are an important component their traditional social, spiritual economic systems. The celebrated Brewarrina stone ( Ngunnhu ) on Barwon largest best documented Basin. However, there has been minimal research many other this system. This paper fo...

The labyrinth is the highly vascularized part of the rodent placenta that allows efficient transfer of gases, nutrients, wastes, and other molecules between the maternal and embryonic circulations. These two blood compartments are separated by blastocyst-derived trophoblasts and endothelial cells with an intervening basement membrane that contains laminin and other typical basement membrane com...

Predicting whether a molecule can traverse chemical labyrinths of channels, tunnels, and buried cavities usually requires performing computationally intensive molecular dynamics simulations. Often one wants to screen molecules to identify ones that can pass through a given chemical labyrinth or screen chemical labyrinths to identify those that allow a given molecule to pass. Because it is impra...

We describe a quantitative method to assess repeated stair stepping stability. In both the mediolateral (ML) and anterioposterior (AP) directions, the trajectory of the subject's center of mass (COM) was compared to an ideal sinusoid. The two identified sinusoids were unique in each direction but coupled. Two dimensionless numbers-the mediolateral instability index (IML) and AP instability inde...