Levels of Abstraction for Neurotechnology 紫 Brain is an extremely 1 m CNS complex system Syst 紫1012 neurons x 10 synapses 1 clAps x Specific 1 mmNetworks interconnectivity Neurons Synapse = H2N-C-C-OH Molecules R
Levels of Abstraction for Neurotechnology Brain is an extremely complex system 1012 neurons 1015 synapses Specific interconnectivity
Tapping into the Nervous System xx The choice and availability of brain signals and recording methods can greatly influence the ultimate performance of the BMI The level of BMI performance may be attributed to selection of electrode technology, choice of model, and methods for extracting rate, frequency, or timing codes
Tapping into the Nervous System The choice and availability of brain signals and recording methods can greatly influence the ultimate performance of the BMI. The level of BMI performance may be attributed to selection of electrode technology, choice of model, and methods for extracting rate, frequency, or timing codes
Spatial and Temporal Scales of Neural signals on-lnvasIvc Invasive MRI -103 neurons Optical imaging EEG 102 101 10 03 LFP 10 Spikes MEG Ce出hi SPACE Fine(microns) ( indep signals) http:/ida.firstfhg.de/projects/bci/bbciofficiall
http://ida.first.fhg.de/projects/bci/bbci_official/ Coarse(mm)
Choice of Scale for Neuroprosthetics Bandwidth ocalization (approximate) Scalp 0~80Hz Volume Electrodes Conduction Cortical surface Electro 0-500Hz Cortical Surface corticogram (ECoG) Implanted 0-7KHz Single Neuron Electrodes 1 mm
Choice of Scale for Neuroprosthetics Bandwidth (approximate) Localization Scalp Electrodes 0 ~ 80 Hz Volume Conduction Cortical Surface Electrocorticogram (ECoG) 0 ~ 500Hz Cortical Surface Implanted Electrodes 0 ~ 7kHz Single Neuron
Spatial Resolution of Recordings Regional Domain Signals Invasiveness EEG 3-5cm Non-invasive ECOG 5-1cm 1mm Field Potential vasive Single Unit 200 microns Moran
Spatial Resolution of Recordings Moran