Spherical splines for scalp potential and current density mapping.
نویسندگان
چکیده
Description of mapping methods using spherical splines, both to interpolate scalp potentials (SPs), and to approximate scalp current densities (SCDs). Compared to a previously published method using thin plate splines, the advantages are a very simple derivation of the SCD approximation, faster computing times, and greater accuracy in areas with few electrodes.
منابع مشابه
A Comparison of Thin Plate and Spherical Splines with Multiple Regression
Thin plate and spherical splines are nonparametric methods suitable for spatial data analysis. Thin plate splines acquire efficient practical and high precision solutions in spatial interpolations. Two components in the model fitting is considered: spatial deviations of data and the model roughness. On the other hand, in parametric regression, the relationship between explanatory and response v...
متن کاملBrain Mapping with Windows 95
This paper presents the design of a Windows brain mapping application named brainmap Brain mapping is a technique that presents the spatial distribution of the electrical brain activ ity which is generated at the cortex and subsequently recorded on the scalp The brain map is constructed by interpolation of the measured scalp potentials at the electrode locations brainmap combines the e orts of ...
متن کاملPii: S1388-2457(99)00205-9
Shown ®rst is the equivalence between the multiple expansion (ME) of the brain electrical generator and the spherical harmonic spectra (SHS) of the potential generated by the electrical generator in an in®nite volume conductor. Based on the equivalence, the SHS and the spatial ®lters which connect the SHS with the ME are deduced, in a concentric 3 sphere conductor and for the 5 EEG source mappi...
متن کاملThe point spread function of the human head and its implications for transcranial current stimulation.
Rational development of transcranial current stimulation (tCS) requires solving the 'forward problem': the computation of the electric field distribution in the head resulting from the application of scalp currents. Derivation of forward models has represented a major effort in brain stimulation research, with model complexity ranging from spherical shells to individualized head models based on...
متن کاملInvestigation of electron and hydrogenic-donor states confined in a permeable spherical box using B-splines
Effects of quantum size and potential shape on the spectra of an electron and a hydrogenic-donor at the center of a permeable spherical cavity have been calculated, using linear variational method. B-splines have been used as basis functions. By extensive convergence tests and comparing with other results given in the literature, the validity and efficiency of the method were confirmed.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Electroencephalography and clinical neurophysiology
دوره 72 2 شماره
صفحات -
تاریخ انتشار 1989