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This Defense Intelligence Reference Document was produced by the Defense Intelligence Agency's Defense Warning Office under the Advanced Aerospace Weapon System Applications program and dated 23 March 2010. It surveys noninvasive and invasive brain-machine interface technologies, including EEG, MEG, fMRI, NIRS and implanted electrode arrays, that could control external devices without limb-operated interfaces. It concludes that noninvasive electrical monitoring is the most promising near-term approach. For the long term it favors invasive single-neuron cortical connections.
From the source: Release of 2026-09-18 Incident: 3/23/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD surveys brain-machine interface technologies intended to allow users to control external devices without conventional manual controls, and it evaluates both noninvasive and invasive approaches for turning neural or related physiological signals into usable commands. The report reviews the underlying neural signals, distinguishes between open- and closed-loop control systems, and examines technologies including scalp-based electrical recording, magnetic and imaging-based methods, and implanted cortical interfaces, with particular attention to bandwidth, response time, signal quality, and practical usability. It concludes that, in the near term, the most practical systems are likely to be noninvasive electrical approaches that draw heavily on muscle and neural signals, while longer-term high-bandwidth control would likely require more advanced invasive interfaces capable of robust two-way communication with individual neurons. The document presents thought-based control of external devices as a research field with plausible assistive and specialized applications, while emphasizing that naturalistic, high-performance control remained constrained by major technical and physiological limits.
UNCLASSIFIED/ /FOlil OFFI&I.t.k WIiii 8Plklf Contents Introduction ............................................................................................................v Direct Neural Signals.............................................................................................. 1 Indirect Neuronal Signals - The BOLD Effect.......................................................... 3 Control of External Devices .................................................................................... 4 Noninvasive Technologies ...................................................................................... 6 EEG ..................................................................................................................... 7 MEG .................................................................................................................... 8 EMG .................................................................................................................... 9 MRI and fMRI ..................................................................................................... 9 NIRS .................................................................................................................... 10 Invasive Technologies .......................................................................................... 10 Open-Loop Direct Cortical Array Algorithm Modeling ....................................... 11 Closed-Loop Peripheral Arrays Utilizing Visual Feedback ................................. 13 MEMS, ECoG, and PSoC Circuitry ...................................................................... 14 Chronic Neural Implants and fMRI ................................................................... 16 New Electrode Designs ..................................................................................... 18 Hybrid Neuro-Robotic Systems for True Closed-Loop BMI ................................ 20 Trials Using Human Subjects ............................................................................ 22 Optical Stimulation of Action Potentials ........................................................... 23 Discussion ............................................................................................................ 23 Noninvasive Electrical Devices ......................................................................... 24 Noninvasive BOLD-Based devices..................................................................... 25 Noninvasive Magnetic Devices ......................................................................... 26 Invasive Technologies - General, Optical, and Ex-Vivo Engineering ................. 26 Implantable Chips, Ladders, and Arrays ........................................................... 27 UNCLASSIFIED/ /rOR: orr1e1J1ct U91!! OHL¥ iii
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 36 pages are in the text index: search them above, or from the library's search.