By Joao Carlos Martins, Leonel Augusto Sousa
This e-book offers a legitimate mathematical and technical viewpoint in useful and structural retina types, provides overview metrics to evaluate these types, and offers insights concerning the versions implementation. It starts off via introducing the retina anatomy and its workings in an in depth manner appropriate for an engineering viewers, whereas offering the mathematical research of the retina neural reaction. furthermore, it explores and establishes a framework for the comparability of retina types by means of organizing a suite of metrics for trying out and comparing the various versions. The booklet follows a sign processing viewpoint, the place all versions and metrics are discretized on the way to be applied and established in a electronic procedure, similar to a working laptop or computer or a really expert devoted machine. Contents: advent to Bioelectronic imaginative and prescient; The Human visible approach; Characterization of the Neural reaction; Retina versions; Neural task Metrics and types review; layout and Implementation of Bioelectronic imaginative and prescient structures.
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Additional info for BIOELECTRONIC VISION: Retina Models, Evaluation Metrics and System Design (Series on Bioengineering & Biomedical Engineering)
Glial cells are substantially smaller and provide support and protection for neurons. They are active in surrounding neurons and holding them in place; in supplying nutrients and oxygen to neurons; in insulating one neuron from another; and in destroying pathogens and removing dead neurons. Glia also have important developmental roles, such as guiding migration of neurons in early development and producing molecules that modify the growth of axons and dendrites [Purves et al. (2007)]. 2 Neuron Dynamics When the integration of the signals gathered by the dendrites and delivered to the cell body surpasses a given threshold, an action potential is generated.
2004)], and an example of an epiretinal implant can be found in [Rizzo III and Wyatt (1997); Humayun et al. (1999)]. Nevertheless, retinal neuroprostheses require the presence of viable cells in the inner retina. Therefore, diseases limited primarily to the outer retina are potentially treatable with a retinal neuroprosthesis. Margalit et al. references [Margalit et al. (2002)] and Weilandet al. [Weiland et al. (2005)] present an extended overview of retinal neuroprostheses. One of these prostheses, entitled the ”Bionic Eye”, uses a new ceramic material to replace the retina’s photoreceptors, which acts as an optic detector that transduces light into electrical impulses by means of the photoferroelectric effect [Wu (2006)].
3. Enumerate the main classes of visual neuroprostheses referred to in the text. 4. 3 identify the class of visual neuroprosthesis targeted in the CORTIVIS project. 5. List the main components of a bioelectronic vision system and the main electronic components associated with visual neuroprostheses. Comment on the main challenges for the implementation of these prostheses. 6. 1. 7. Identify the main advantages of the penetrating microelectrodes, such as the Utah Microelectrode Array, compared to the surface electrodes used, for example, by Dobelle.
BIOELECTRONIC VISION: Retina Models, Evaluation Metrics and System Design (Series on Bioengineering & Biomedical Engineering) by Joao Carlos Martins, Leonel Augusto Sousa