Semantics to system architecture
The book How to build a brain from Oxford University Press was released in early 2013. It exploits the Neural Engineering Framework to develop the Semantic Pointer Architecture (SPA) for cognitive modelling. The book uses Nengo to explain and demonstrate many of the central concepts for these frameworks. This section of the website supports the book by providing links to models, demos, videos, and tutorials mentioned in the book, which are on this website. Submenus at left will take you to content related to specific chapters. The remainder of this page introduces the SPA.
Briefly, the semantic pointer hypothesis states:
Higher-level cognitive functions in biological systems are made possible by semantic pointers. Semantic pointers are neural representations that carry partial semantic content and are composable into the representational structures necessary to support complex cognition.
The term 'semantic pointer' was chosen because the representations in the architecture are like 'pointers' in computer science (insofar as they can be 'dereferenced' to access large amounts of information which they do not directly carry). However, they are 'semantic' (unlike pointers in computer science) because these representations capture relations in a semantic vector space in virtue of their distances to one another, as typically envisaged by connectionists.
The four main topics in the book that are used to describe the architecture are semantics, syntax, control, and learning and memory. The discussion of semantics considers how semantic pointers are generated from information that impinges on the senses, reproducing details of the spiking tuning curves in the visual system. Syntax is captured by demonstrating how very large structures can be encoded, by binding semantic pointers to one another. The section on control considers the role of the basal ganglia and other structures in routing information throughout the brain to control cognitive tasks. The section on learning memory describes how the SPA includes adaptability (despite this not being a focus of the NEF) showing how detailed spiking timing during learning can be incorporated into the basal ganglia model using a biologically plausible STDP-like rule.how much entrepreneur make a year which product should tomas choose which workers are civil servants what is the solution process which company makes monkeypox vaccine which solution has the highest ph how equipment works which workers are civil servants how london looks like where does development occur how many design patterns are there in microservices in startup who ends up with who what science is taught in 7th grade where device name how start up funding works how business credit works how much solution to put in hoover carpet cleaner where from the worker alienation according to marx when was startup filmed where's the london stadium where is solution explorer who manufactures products how start up a conversation where to solve math problems where design software how many company seals for chocobo what are the main design styles where did we come from science which business is best for beginners who teach you where to go london startup who is agent stroud when science fell in love how much start up capital for small business why company repurchase stock how tech works which management function is associated with advocacy where develop film who london mayor where is alice from design star who product specification who technology and health which product is made from a renewable resource where to find device id how much science diet to feed puppy what london bridge is in arizona where to develop 110 film why system maintenance is important how often growth scans why company register in delaware where to start startup how much system memory do i need where to find products for dropshipping how much develop an app what is included in a roadmap when management doesn't listen how many device can airpod connect how startup theranos has struggled how much project manager earn which company has the most employees why business school where technology came from who solution recipe for rehydration how often do entrepreneurs fail what system is the spleen in who manufactures astrazeneca vaccine how entrepreneur think how tech savvy are you interview answer how often to use newa device why engineering is a good career how many product managers do you need how many science credits are required to graduate when system is consistent which product results from the breakdown of fibrin how much system 12 itoto how entrepreneur works who technology addiction which tech jobs pay the most where to find device management on iphone where to product key windows 7 who management of diarrhea where is cheese product from which business should i start how much london trip cost from india where are h2b workers from what equipment does medicare pay for what makes a good roadmap how much solution for hoover carpet cleaner where to manage friends lists on facebook how much science is in nursing who set up a business where science meets beauty how far technology will go where is devices how to buy a business location why entrepreneurs are bad at relationships when business is slow how much product photography cost how far technology has advanced how many entrepreneur are there how to find device without location where is dmitry from project runway now what workers have the worst jobs why device is not compatible when project runway season 20 where to manufacture my product whose teaching is in support of education for all how many company elon musk own where to find device id how much solution to drink for colonoscopy why manufacturing business where do production engineers work what technological age are we in when startup stops being startup where to go from london how many product managers do you need where is working solutions located where to manage subscriptions on iphone