The proposed invention discloses a new system and method for neurofeedback (NFB). Accordingly, this invention can be classified as a diagnostic device that detects, measures or records bioelectric signals of the body or it's part; namely bioelectrical signals produced by brain's activity. In principle that is the field of electroencephalography (EEG) in the sense that EEG signals are used to create neurological biofeedback, also known as neurofeedback.
Neurofeedback, further in the text denoted as NFB, represents a noninvasive method that is used to gradually improve brain's functions. With NFB or EEG feedback, brain activity is measured and fed back in real time, and due to that, over the course of time, brain's self-regulation is achieved and neurological disbalance is decreased and/or annulled. Neurological disbalance may be the result of different brain function deteriorating processes. NFB, thanks to brain's plasticity, increases quality of the brain's neural network, which, as the result, makes the NFB trained brain to work better.
NFB principle of operation is relatively simple; a set of EEG electrodes is placed on a subject's scalp, following a protocol that is determined by symptoms of the subject. Brainwaves are detected by means of EEG electrodes and processed on a computer in real time. EEG electrodes do not inject current and no harm can be done by using them. It is worth to note that NFB setup, due to smaller number of EEG measuring electrodes, cannot be the substitute for a “clinical EEG” that is used for medical diagnostics. In order to present to the subject a feedback about their brain functioning during NFB training, brainwaves and other information obtained in the process are processed by the computer. The feedback can be presented to the subject in different ways; usually as variations in the playback of audio-visual recording or actions in videogames.
After a sufficient number of training cycles, the subject's brain starts to produce “desired” brainwaves and suppress “undesired” ones, that is the very goal of NFB. In many cases NFB has positive and permanent effect, yet in some cases training cycles have to be repeated indefinitely. Small percentage of cases display no changes due to NFB, and it is impossible to predict with absolute certainty to what extent NFB would be useful in an isolated case.
Due to the use of EEG electrodes plugged into electronic device that is further connected to a computer in order to process said received EEG signals into video, audio or tactile feedback signal for a subject, it is very difficult to conduct NFB in a natural environment. Furthermore, NFB systems are difficult to move or use outdoors, due to poor visibility of screen content in daylight.
But, by far the greatest obstacle to performing NFB in natural environment is the fact that, when in nature, brain processes a lot of visual information making it difficult for a subject to maintain focus on the computer screen. This essential technical problem is solved by the said invention by modification of the standard NFB chain:
in a way that instead of the screen trained animal is used:
In other words, NFB is implemented in a way that, after the signal processing and algorithmic decisioning is finished, the data processing system sends a command to the animal to which the subject is looking at. Since the animal is a natural part of the natural environment it is easy for the subject to keep the focus on her. The main advantage of this approach is that such modified NFB can easily be conducted in a natural environment; e.g. park, meadow, large swimming pools.
Bearing in mind that the system has to communicate with the animal, without distraction and subject's knowledge, the second technical problem is revealed, i.e. how to perform such communication in a simple and practical manner. According to the said invention, the best way is to use trainable animals that communicate naturally with sounds of frequency that is above human hearing range; i.e. in frequencies above 20 kHz. The first selections are certainly sea mammals: dolphins and whales. The dogs are also suitable selection because, even if they communicate with humans in “normal” frequency range, they are susceptible to sounds with frequency higher than 20 kHz.
The third technical problem refers to multiple NFB trainings performed simultaneously in the same place; i.e. when more than one person and more than one animal are in the same space, where by the word “space” we define an area in which the interferences between ultrasonic communications are possible. This technical problem is solved by training animals to react only to ultrasonic signals of specific shape, i.e. wave train. In other words, each animal included in a NFB has own set of the sound codes and is trained to ignore commands with other wave trains, i.e. codes. A good example to said is when a horse ignores a gunfire, because that signal has no meaning to the horse.
Prior art is rich in both patent and non-patent literature.
International patent application published as WO2016/139576A2 for the invention: “BRAIN ACTIVITY MEASUREMENT AND FEEDBACK SYSTEM”, filed in the name of Mindmaze S. A., Switzerland; teaches of many NBF variations wherein the main feature is a user module (headset) with micro-screens for projecting of the NFB content. This system can overcome physical barriers of a conventional NFB system, yet it remains opened question how the “closing” of the visual field affects the NFB performance. Furthermore, the document does not include the use of animals in any way. This patent application represents a document defining the general state of art, which is not considered to be of particular relevance.
International patent application published as WO2015/035058A1, for the invention: “SYSTEM AND METHOD FOR ANIMAL-HUMAN NEURAL INTERFACE”, filed in the name of Northwestern University, USA; teaches of a direct human to animal electrical neural link. The described system is invasive to the animal and/or human as seen from claims 1 and 3 of the document; there is a need to implant electrodes in body parts of the animal and human. It must be noted that most human-animal interfaces are implemented in an invasive way; which, inter alia, is not ethically allowed and leaves physical and psychological trauma to all chain participants. This patent application represents a document defining the general state of art, which is not considered to be of particular relevance.
International patent application published as WO2009/102345A1, for the invention: “MOBILE DEVICE DOG WHISTLE”, filed in the name of Sony-Ericsson Mobile Communication AB, Sweden; teaches of a technical solution where a mobile device is transformed into ultrasonic emitter which communicates with animal in the performance area by means of ultrasound. Communication to the animal is performed for the purpose of defense or the animal training. This invention is relevant due to the fact that it discloses a connection of an animal and a mobile device. The significant difference in comparison with the present invention is the absence of a feedback between the animal's action and subject's EEG pattern; although in the part of the chain a trained animal that is susceptible to ultrasonic signals is used. Thus, the cited patent application represents a document defining the general state of art, which is not considered to be of particular relevance. Chinese patent application CN104049979A for the invention “UNIVERSAL ULTRASONIC DOG TRAINING DEVICE AND DOG TRAINING METHOD”, filed in the name of Shanghai Feixun Comm. Co. LTD, Kina; teaches about the device for training, and subsequent control, of an animal that is independent of the speech of the person communicating with the animal and the corresponding use of the said device. According to the abstract, the device consists of a command-to-ultrasonic signal translation module, an ultrasonic animal training module, an information storing and a control and ultrasound emission module. This document is relevant due to the fact that the present invention also uses the animal training module in order to provide an adequate, previously entrained, animal reaction to a given EEG pattern. It is worth to note that the cited document remains silent about the use of neither EEG signals nor the connection human-animal-human as a part of NFB chain. Thus, this patent application represents a document defining the general state of art, which is not considered to be of particular relevance.
The article L. M. Glenk: “CURRENT PERSPECTIVES ON THERAPY DOG WELFARE IN ANIMAL-ASSISTED INTERVENTIONS”; Animals 2017, 7(2), 7; doi:10.3390/ani7020007 available at: http://www.mdpi.com/2076-2615/7/2/7/htm teaches about the aspects of using a dog in a so called AAI (Animal Assisted Interventions). Within the AAI animals are used as a support for human health improvement therapies. The article discusses, using exact parameters, the practice of use of dogs in the therapeutic environment, considering the aspect of the AAI effect on animals, which has not been analyzed before. The relevance of this document is the fact that it discusses the use of trained animals for AAI, which is the significant element of the invention presented in disclosed invention; although, the document does not teach about the use of animals as a part of NFB chain. Therefore, this document represents a document defining the general state of art, which is not considered to be of particular relevance.
The document “TELEPRESENCE ARTWORK” of the author E. Kac, Slovenia; represents an attempt to understand behavior of bats by visualizing ultrasonic communication of other bets in an artificial cave, by the use of an artificial bat as a sensor and a virtual reality user module; as seen at the link: http://www.ekac.org/darker.html. The document reveals the aspect of the following chain: bat-hardware-human, but the document remains silent regarding the feedback loop disclosed by the present invention. Therefore, this document represents a document defining the general state of art, which is not considered to be of particular relevance.
The article of group authors; Cheol-Hu Kim, Bongjae Choi, Dae-Gun Kim, Serin Lee, Sungho Jo, Phill-Seung Lee: “REMOTE NAVIGATION OF TURTLE BY CONTROLLING INSTINCT BEHAVIOR VIA HUMAN BRAIN-COMPUTER INTERFACE”; Journal of Bionic Engineering, 2016; 13 (3): 491 DOI: 10.1016/S1672-6529(16)60322-0; that can be found at: https://www.researchgate.net/publication/305393072 teaches of turtle's motion controlled by a human via human turtle connection performed with the EEG based Brain-Computer Interface. The turtle is stimulated for certain motion by the use of her instinct to find the light, namely, a special device placed on the turtle's head covers parts of vision field according to human's EEG signals. This document is relevant because it shows noninvasive implementation of some elements of feedback loop human-animal-human. It is essential to note that the NFB, per se, induces measurable changes in the subject's EEG pattern and in the cited “turtle control system” the subject's EEG pattern has not been changed in a therapeutic manner. Namely, a human observes a position of a remote animal via camera placed on the animal, and by his will (e.g. visualization of movement) produces certain EEG pattern that, after being recognized and processed by EEG analytics, changes turtle's vision field which causes the turtle to move in desired direction. Differences between cited document and the present invention are in the use of a trained animal—which a turtle, surely, cannot be—and in the change of the subject's EEG pattern, which is the result of the therapeutic effect of NFB. Namely, the present invention comprises a module by which the animal's behavior affects humans' EEG pattern and in the cited document the effect is exclusively from human to animal without the feedback's benefit. However, there is no doubt that the above cited document represents the closest prior art to present invention; see
The invention discovers a method of operating a system for neurofeedback (NFB) training on a subject that includes trained animal species in a feedback chain. The described system consists of at least one user module, mobile module and option modules. Option modules can be selected from, so called, separated modules that are placed in the NFB performance area and an animal module that is placed on the animal.
The user module is equipped with EEG electrodes for brainwave recording, an EEG amplifier, an EEG signal processing unit that converts EEG signals to digital recordings suitable for wireless transfer, a pairing unit for enabling connectivity with other modules and an ultrasonic speaker for communication with the trained animal. Mobile module is equipped with data processing unit that processes EEG signals of one or more users and a pairing unit for enabling connectivity with other modules. Also, mobile module comprises additional animal training modules, control module and internet module for data cloud connectivity. All these modules are connected with the data processing unit. Both option units are equipped with: a data processing unit, a pairing unit for enabling connectivity with other modules and ultrasonic speaker for communication with animals.
The therapeutic NFB on the subject is performed by means of the system which performs a closed chain of steps below:
A->B->C->D->A
wherein:
Suitable animal species for the use in NFB training are dogs and dolphins. In one embodiment, the mobile module is wearable and placed on the subject, separated or as a part of the user module, while changes, control and interventions are made via internet connection with data cloud. Pairing units of the above cited modules use short-range communication means.
In one embodiment, for communication in the step C. ultrasonic speaker is placed only in the user module. In another embodiment the ultrasonic speaker that is placed in the animal module which is noninvasively mounted on the animal in the form of a patch or a collar. In yet another embodiment, in the step C., the ultrasonic speaker is integrated in the separated module which is placed in the performance area.
In yet another aspect of the invention, the connection mobile module-option modules, i.e. respective ultrasonic speakers, is used for the training of the selected animals.
In yet another aspect of the invention, one or more mobile modules process information from the step A. for multiple users in order to control multiple animals in a way that each animal has been trained for a different set of ultrasonic commands. Thus, multiple independent NFB therapies can be performed without interference.
Presented invention also discloses a communication system for performing neurofeedback at subjects that include other trained animal species in the NFB chain in a way that it comprises means for conduction of previously stated procedures. The described system, being the simplest one, is the one where:
As already mentioned in previous sections, a NFB is a noninvasive method that improves brain functioning when used over a period of time. Historically, it dates back in 1924 when psychiatrist Hans Berger connected, by means of noninvasive electrodes, patients scalp to a galvanometer and made the first recording of brainwaves. Development of measurement methods and improved hardware enabled discoveries and subsequent classification of brainwaves according to their frequency ranges; see
In the last decade NFB is being used for treatments ranging from ADHD to alcoholism. More information can be found in the review: D. Corydon Hammond, PhD, ABEN, QEEG-D “An Introduction to Neurofeedback”; available at: http://www.appliedneuroscience.org.au/neurotherapy
Traditionally, NFB is conducted as shown in
The main difference between the disclosed invention and the traditional NFB is the fact that one element of the feedback loop is a trained animal (101, 102); susceptible to ultrasonic stimuli. The difference can clearly be seen in
There are numerous advantages of this kind of NFB's implementation; the NFB in not limited to the closed performance arena, the produced live animal feedback has significant impact on the subject's EEG that is more intensive when compared with the feedback produced by watching images on the screen (60) as is the case in traditional NFB implementation. The only significant drawback is that NFB implementation according to presented invention requires trained animal (101, 102). Especially suitable species susceptible to ultrasonic commands are canines, i.e. dogs; as well as dolphins and whales that communicate in the ultrasonic range also. For other suitable animal species details can be found here: https://en.wikipedia.org/wiki/Hearing_range
In case that performance area is a large open space it is useful to use additional modules for generation of ultrasonic signals; e.g. underwater modules for dolphins/whales or external modules in large parks for dogs. Each additional module can be separated standalone module (30), or an animal module (40) that is noninvasively placed on the trained animal (101, 102). It can be formed as a dog collar; or a sticky patch for dolphins or whales. It is worth to note that mentioned modules should not prevent animals in their natural behavior within given environment. The number of these option modules is arbitrary.
As already mentioned, NFB implementation according to the presented invention uses trained animal in the feedback loop. The prior art document CN104049979 teaches about one way to train for NFB. As mentioned before, the response to ultrasonic commands must be fully individualized; i.e. each animal should have its own set of coded commands which in turn enables simultaneous conduction of NFB of many subjects (10) in the same performance area.
Once digitalized, or analogously modulated, EEG signal can be, by means of the pairing unit (14), transferred to the mobile unit (20), i.e. it's pairing unit (25). Examples of good pairing means are: asynchronous UWB (ultra—wide—band) communication, any communication protocol used for IoT (Internet of Things) or well-known Bluetooth® modules. The main problem of the present communication is energy efficiency that reflects to the power supply (16) autonomy, without which the user module (10) becomes useless. It should be noted that it is favorable that all the pairing units (14) use duplex communication; which is not a necessary condition but certainly an advanced design.
Some of possible embodiments are shown in
A->B->C->D->A
where:
Step D->A closes the loop of the said NFB.
In yet another embodiment according to the invention shown in
In yet another embodiment according to the invention shown in
In yet another embodiment according to the invention, the mobile module (20) and the user module (10) are integrated into one module; see
The industrial applicability of this invention is obvious, presented invention discovers method of implementation of NFB on the subject (100) that includes other trained animal species (101, 102) in the feedback chain, as well as the system for neurofeedback (NFB) training itself.
Number | Date | Country | Kind |
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P20171555A | Oct 2017 | HR | national |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2018/076729 | 10/2/2018 | WO | 00 |