An Inductive Tongue Computer Interface for Control of Computers and Assistive Devices

Struijk, Lotte N. S. Andreasen

doi:10.1109/tbme.2006.880871

Cited by 153 publications

(97 citation statements)

References 10 publications

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“…The possible voluntary actions that have been employed as computer interfaces for subjects with SCI include mechanical controls, such as chin-operated devices [6]; tongue-controlled systems and mouthsticks [7][8]; headposition controls [9][10]; and voice commands [11]. Some studies have looked into electromyography (EMG), both to determine head angles using neck EMG signals [12][13] and as an interface for controlling computer cursor position [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Case study: Head orientation and neck electromyography for cursor control in persons with high cervical tetraplegia

Williams

Kirsch

2016

J Rehabil Res Dev

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Abstract-We evaluated the ability of an individual with a high cervical spinal cord injury (SCI) to control a cursor on a computer screen using two different user interfaces: (1) head movements measured via a head-mounted orientation sensor and (2) electromyography (EMG) signals from four head and neck muscles acquired using a 4-channel implanted upper-limb neuroprosthesis that had been deployed in an earlier study. The subject moved the cursor to a set of targets on the screen in a two-dimensional, center-out, target-acquisition task, and his performance was evaluated with a variety of performance measures to assess both position and velocity control accuracy. The subject's performance with both command sources was also compared with the performance of a group of nondisabled subjects. Head orientation provided more accurate performance but was less responsive than EMG. Both command sources showed some directionally dependent performance, with movement to diagonally located targets being performed by a series of sequential motions rather than via straight paths. Overall, the SCI subject's performance with each command source was similar to that reported for a nondisabled population using the same interfaces and performing the same task.

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Section: Introductionmentioning

confidence: 99%

Case study: Head orientation and neck electromyography for cursor control in persons with high cervical tetraplegia

Williams

Kirsch

2016

J Rehabil Res Dev

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“…The 1.0 s response time and >90 percent accuracy of the present TDS prototype represent an acceptable performance for a device with six direct commands that are all simultaneously accessible to the user. Even though the TDS hardware and SSP algorithm still have significant room for improvement, the preliminary results with TDS prototypes are already better than the ATs evaluated by Lau and O'Leary [17] as well as the recent tongue-computer interface (TCI) reported by Struijk [25]. The ITR achieved by our TDS prototype is compared with other TCIs and BCIs in Table 2.…”

Section: Benchmarkingmentioning

confidence: 89%

Introduction and preliminary evaluation of the Tongue Drive System: Wireless tongue-operated assistive technology for people with little or no upper-limb function

Huo

Wang²,

Ghovanloo³

2008

JRRD

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Abstract-We have developed a wireless, noncontact, unobtrusive, tongue-operated assistive technology called the Tongue Drive System (TDS). The TDS provides people with minimal or no movement ability in their upper limbs with an efficacious tool for computer access and environmental control. A small permanent magnet secured on the tongue by implantation, piercing, or tissue adhesives is used as a tracer, the movement of which is detected by an array of magnetic field sensors mounted on a headset outside the mouth or on an orthodontic brace inside. The sensor output signals are wirelessly transmitted to an ultraportable computer carried on the user's clothing or wheelchair and are processed to extract the user's commands. The user can then use these commands to access a desktop computer, control a power wheelchair, or interact with his or her environment. To conduct human experiments, we developed on a face shield a prototype TDS with six direct commands and tested it on six nondisabled male subjects. Laboratory-based experimental results show that the TDS response time for >90% correctly completed commands is about 1 s, yielding an information transfer rate of ~120 bits/min.

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“…For severely disabled individuals who are not locked-in, there are several types of assistive technology. These include the aforementioned tongue control, sip-puff, head-motion sensors, and eye tracking (20,21,25). Each of these methods has its advantages, yet we submit that the combination of simplicity, robustness, high degrees of…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, slower measures dependent on autonomic functions such as salivary pH (17) or brain activity as measured with functional MRI (fMRI) (18,19) both provide valuable windows of communication, but neither allows rapid self-expression. Thus, currently available means of communication and environmental control for high-level spinal cord injury rely on capturing residual control of organs such as the head (20) or tongue (21), and solutions for locked-in syndrome rely on capturing residual control of the sphincter muscles or eye movements (22)(23)(24). Although these and other approaches provide solutions (25), there remains a profound need for effective humanto-machine interfaces that will function in severe disability (26).…”

mentioning

confidence: 99%

Sniffing enables communication and environmental control for the severely disabled

Plotkin

Sela

Weissbrod

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

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Paradoxically, improvements in emergency medicine have increased survival albeit with severe disability ranging from quadriplegia to "locked-in syndrome." Locked-in syndrome is characterized by intact cognition yet complete paralysis, and hence these individuals are "locked-in" their own body, at best able to communicate using eye blinks alone. Sniffing is a precise sensory-motor acquisition entailing changes in nasal pressure. The fine control of sniffing depends on positioning the soft palate, which is innervated by multiple cranial nerves. This innervation pattern led us to hypothesize that sniffing may remain conserved following severe injury. To test this, we developed a device that measures nasal pressure and converts it into electrical signals. The device enabled sniffs to control an actuator with speed similar to that of a hand using a mouse or joystick. Functional magnetic resonance imaging of device usage revealed a widely distributed neural network, allowing for increased conservation following injury. Also, device usage shared neural substrates with language production, rendering sniffs a promising bypass mode of communication. Indeed, sniffing allowed completely paralyzed locked-in participants to write text and quadriplegic participants to write text and drive an electric wheelchair. We conclude that redirection of sniff motor programs toward alternative functions allows sniffing to provide a control interface that is fast, accurate, robust, and highly conserved following severe injury.locked-in | quadriplegic | soft palate

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An Inductive Tongue Computer Interface for Control of Computers and Assistive Devices

Abstract: This letter introduces a new inductive tongue computer interface to be used by disabled people for environmental control. The interface demands little effort from the user, provides a basis for an invisible interface, and has potential to allow a large number of commands to be facilitated.

Cited by 153 publications

References 10 publications

Case study: Head orientation and neck electromyography for cursor control in persons with high cervical tetraplegia

Case study: Head orientation and neck electromyography for cursor control in persons with high cervical tetraplegia

Introduction and preliminary evaluation of the Tongue Drive System: Wireless tongue-operated assistive technology for people with little or no upper-limb function

Sniffing enables communication and environmental control for the severely disabled

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