Browsing by Author "Santos, C.F."
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- Computational simulation of the vestibular system using a meshless particle methodPublication . Santos, C.F.; Parente, Marco; Belinha, J.; Natal Jorge, R.M.; Gentil, FernandaVestibular rehabilitation is the most used therapy in cases of unbalance diagnosis. The vertigo symptoms are commonly related with inner ear diseases, affecting 20%-30% of the world population (von Brevern & Neuhauser, 2011). Its prevalence is higher in elders. In this work, a three-dimensional model of the semi-circular canal of the vestibular system, containing the fluids that pro-mote body balance, will be used. The Smoothed-Particle Hydrodynamics (SPH) method, a meshless particle method, will be the discrete numerical technique used to simulate the fluid behaviour. In the SPH the discretization is represented by particles with constant mass (G.R. Liu & Liu, 2003). The obtained results allow to understand the behaviour of the vestibular structures during the rehabilitation manoeuvres.
- Facial nerve:a clinical and anatomical reviewPublication . Gentil, Fernanda; Campos, J.C. Reis; Parente, Marco; Santos, C.F.; Areias, Bruno; Jorge, R.M. NatalThe information that pass through the facial nerve allows the expression of our smile, joy or sadness, the “facial expression”. The face is the mark of our individuality. The facial nerve is responsible for innervation of the face muscles, like the previous two-thirds of the tongue and secretion of salivary and tears glands. The aim of this work is to remember the anatomy and physiology of the facial nerve, pathology and possible treatments of facial paralysis.
- Trigeminal nerve – interdisciplinarity between the areas of dentistry and audiologyPublication . Gentil, Fernanda; Campos, J.C. Reis; Parente, Marco; Santos, C.F.; Areias, Bruno; Natal Jorge, R.M.The trigeminal nerve is the most important nerve for the sensory and motor innervation of the oral system. A detailed knowledge of the trigeminal nerve is very important in the diagnosis and possible treatment of any type of orofacial or temporomandibular joint pain.
- Using meshless methods to simulate the free vibrations of the cupula under pathological conditionsPublication . Santos, C.F.; Parente, Marco; Belinha, J.; Natal Jorge, R.M.; Gentil, FernandaEach canal of the vestibular system of the inner ear is composed of a circular path of continuum fluid. Inside each semicircular canal, it is possible to find a cupula, a gelatinous body contain-ing sensory hair cells, and the focus of this work. One of the causes of vestibular disorders is the abnormal concentration of otoconia particles near the cupula. The accurate determination of the natural frequency (first vibration frequency) of the cupula would allow to know which external frequency could be induce to stimulate externally the cupula. Thus, theoretically, the resonance effect would induce physical vibra-tion to the cupula and disperse the otoconia particles, reducing the vertigo symptoms. Hence, in this wok, two-dimensional and three-dimensional geometrical models of the cupula were constructed. Then, a free vibration analysis was performed using three distinct numerical techniques, the Finite Element Method (FEM), and two meshless methods: the Radial Point Interpolation Meshless Method (RPIM) and the Natural Neighbour Radial Point Interpolation Method (NNRPIM).