#### Filter Results:

- Full text PDF available (1)

#### Publication Year

1982

1998

- This year (0)
- Last 5 years (0)
- Last 10 years (0)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

- Berend Hillen, H W Hoogstraten, L. J. Post
- Journal of biomechanics
- 1986

A mathematical model of the flow in the circle of Willis has been designed and the effects of (a) the large anatomical variation of the communicating arteries and (b) physiological changes of the resistances of the vertebral arteries have been studied. The influence of the posterior perforating arteries on the flow in the posterior communicating arteries… (More)

- Berend Hillen, B A Drinkenburg, H W Hoogstraten, L. J. Post
- Journal of biomechanics
- 1988

A very simple model of the flow in the circle of Willis is described in this paper. Disregarding pulsatility and vessel wall elasticity, fluxes in all segments of the circle of Willis and its afferent and efferent vessels are calculated by applying the Poiseuille-Hagen formula. Comparison with the fluxes calculated numerically from a more sophisticated… (More)

- R J Diependaal, Hendrikus Duifhuis, H W Hoogstraten, Max A. Viergever
- The Journal of the Acoustical Society of America
- 1987

In this article, a robust numerical solution method for one-dimensional (1-D) cochlear models in the time domain is presented. The method has been designed particularly for models with a cochlear partition having nonlinear and active mechanical properties. The model equations are discretized with respect to the spatial variable by means of the principle of… (More)

- Janneke Ravensbergen, J K Krijger, Aard L Verdaasdonk, Berend Hillen, H W Hoogstraten
- Journal of biomechanical engineering
- 1997

The apex of human vertebro-basilar junctions can be sharp-edged or blunted. In the present study, the effect of blunted apex on the flow in vertebro-basilar junction models is investigated. We compared the flow phenomena in a series of junction models with blunted apices and confluence angles 45, 85, and 125 deg with the flow phenomena in a series of… (More)

- J K Krijger, Rob M. Heethaar, Berend Hillen, H W Hoogstraten, Janneke Ravensbergen
- Journal of biomechanics
- 1992

The flow in the basilar artery arises from the merging of the flows from the two vertebral arteries. To study the flow phenomena in the basilar artery, computations have been performed using a finite element (FE) method. We consider steady flow in a geometrically symmetric confluence. For simplicity, channels with a rectangular cross-section have been used.… (More)

- Janneke Ravensbergen, Janneke Ravensbergen, J K Krijger, Berend Hillen, H W Hoogstraten
- Arteriosclerosis, thrombosis, and vascular…
- 1998

Atherosclerosis is a common finding in the vertebrobasilar junction and in the basilar artery. Several theories try to link the process of atherogenesis with the forces exerted by the flowing blood. An attractive relation has been found between the locations in vessels at which atherosclerotic plaques are often present and the locations in models where… (More)

- Berend Hillen, T Gaasbeek, H W Hoogstraten
- Journal of biomechanics
- 1982

This paper reports on a mathematical model designed to study the hemodynamics of one posterior communicating artery and its afferent and efferent vessels. The variables in the model are the diameter of the posterior communicating artery, the resistance in the vertebral artery and the ratio of the two peripheral resistances. In the model, the "posterior… (More)

- P J Reuderink, H W Hoogstraten, Pieter Sipkema, Berend Hillen, Nico Westerhof
- Journal of biomechanics
- 1989

The accuracy of nonlinear and linear one-dimensional models in describing pulse wave propagation in a uniform cylindrical viscoelastic tube, with Womersley's parameter alpha equal to 7.6 at 1 Hz, was evaluated. To this end calculations of wave propagation using these models were compared with the experimentally determined propagation of the pressure wave in… (More)

- H W Hoogstraten, J G Kootstra, Berend Hillen, J K Krijger, P J Wensing
- Journal of biomechanics
- 1996

Blood flow in an artery with two successive bends is simulated by a finite-element computation of steady flow of a Newtonian viscous fluid through a rigid tube having the same shape as a specific part of the femoral artery. Notwithstanding the fact that the bends in the model geometry are rather gentle, the axial and secondary flow patterns, computed for a… (More)

- Janneke Ravensbergen, J K Krijger, Berend Hillen, H W Hoogstraten
- Journal of biomechanics
- 1996

In earlier work, it was demonstrated that the flow in models of the vertebro-basilar junction is highly three-dimensional and the geometry exerts a strong influence on the hemodynamics. The morphology of the vertebro-basilar junction is very variable amongst individuals. In a study of 85 human vertebro-basilar junctions, the angle between the vertebral… (More)