Efficacy Of Treatment For Resistant Command Hallucinations.
Funder
National Health and Medical Research Council
Funding Amount
$343,875.00
Summary
Auditory hallucinations (AHs), often described as voices, are a common symptom of schizophrenia and psychoses. Command hallucinations (CHs) are a type of AH in which the voice heard by the patient commands him or her to perform a particular action. The nature of the directive may vary from inconsequential actions to commands to harm the patient or others. There is widespread public concern about the danger individuals with schizophrenia or related disorders pose to themselves and to the communit ....Auditory hallucinations (AHs), often described as voices, are a common symptom of schizophrenia and psychoses. Command hallucinations (CHs) are a type of AH in which the voice heard by the patient commands him or her to perform a particular action. The nature of the directive may vary from inconsequential actions to commands to harm the patient or others. There is widespread public concern about the danger individuals with schizophrenia or related disorders pose to themselves and to the community. There is firm evidence pointing to the important role that CHs play in propelling psychotic individuals into serious and damaging actions. We have found, however, that most individuals who comply with dangerous CHs do so, not because they are angry, violent, antisocial or wish to cause harm, but because they feel powerless to resist. Though CHs are one of the most disturbing symptoms of psychosis, standard treatment has proved to be of limited benefit. This study will evaluate the effectiveness of Treatment of Resistant Command Hallucinations (TORCH), an innovative treatment for CHs. TORCH is an extension of an existing treatment for psychosis that we previously developed. TORCH aims to reduce the distress, worry and harmful or self-defeating behaviour associated with CHs by arming the patient with effective strategies that will enhance resistance and reduce compliance. The project has clear implications for improved clinical and therapeutic management of CHs with major public health, clinical and forensic repercussions. The consequences of being formally assessed as being at risk of acting violently result in the potential for substantial restrictions on the freedom of the individual. The availability of TORCH may prompt a less restrictive management of individuals at risk of dangerous behaviour and promote a more optimistic attitude amongst clinicians. Relatives and carers also stand to benefit through reduction in perplexing and fear-inducing behaviours.Read moreRead less
Risk Factors For Compliance With Command Hallucinations In Psychotic Disorders
Funder
National Health and Medical Research Council
Funding Amount
$180,290.00
Summary
There is widespread public concern about the danger individuals with schizophrenia or related disorders pose to themselves and to the community. Whilst a number of violence risk factors such as being male, exhibiting hostility, and having a prior history of violence are well established, they are of limited use to clinicians in making management decisions. Our study will investigate a different approach to identify individuals and occasions when a sufferer might require more intensive care or ob ....There is widespread public concern about the danger individuals with schizophrenia or related disorders pose to themselves and to the community. Whilst a number of violence risk factors such as being male, exhibiting hostility, and having a prior history of violence are well established, they are of limited use to clinicians in making management decisions. Our study will investigate a different approach to identify individuals and occasions when a sufferer might require more intensive care or observation. Most individuals with schizophrenia experience auditory hallucinations. Amongst these hallucinations, voices that command the individual to undertake a particular action are common; many of these involve significant potential harm to the hallucinator or to other persons. We will attempt to identify those factors that are associated with an individual obeying command hallucinations. Variables to be examined include the characteristics of the hallucinated voices, and the beliefs of the subject about the power of the voices. Subjects will be interviewed to find out whether they have delusions that are consistent with their hallucinations, whether they suffer from Antisocial Personality Disorder, or are dependent on alcohol or drugs. We will also determine whether subjects who report being raised by authoritarian parents, who are dependent on the approval of others, or who see external factors as determining the occurrence of major events in their lives, are more likely to act on their hallucinations. Two groups of 100 patients will be studied. One group will be representative of people living in the community with schizophrenia. The other group will be people with schizophrenia who have been treated by the State Forensic Psychiatric Services. Statistical models will be developed in order to determine the accuracy with which compliance with command hallucinations can be predicted. These models with also reveal which risk factors are the most important.Read moreRead less
The Neurobiology Of Auditory Hallucinations: Characterisation Of Dysfunction Within A Neural Circuitry Model.
Funder
National Health and Medical Research Council
Funding Amount
$299,625.00
Summary
This is a highly innovative research proposal which is based on years of extensive research by our group. Auditory hallucinations are a prominent and potentially disabling symptom of psychosis, however it is extremely difficult to study them scientifically. Past research by our group (and other groups internationally) has indicated that an extensive network in the brain is activated whenever auditory hallucinations occur, but the source of this brain activity is unclear. It was thought that the ....This is a highly innovative research proposal which is based on years of extensive research by our group. Auditory hallucinations are a prominent and potentially disabling symptom of psychosis, however it is extremely difficult to study them scientifically. Past research by our group (and other groups internationally) has indicated that an extensive network in the brain is activated whenever auditory hallucinations occur, but the source of this brain activity is unclear. It was thought that the source may be the same brain circuits that are involved in generating inner speech or monitoring it, but our past research has ruled out these possibilities. Instead, our recent work suggests that auditory hallucinations may be associated with poorly functioning connections within central auditory processing circuits, specifically between left and right auditory association cortical regions. We conceptualise hallucinations as an abnormal and involuntary form of memory retrieval consequent to this dysfunction. Our study will pioneer methods of measuring connectivity in the brain circuits identified in our model, using a combination of functional magnetic resonance imaging (fMRI) and electroencephalographic (EEG) techniques in tandem with tests of central auditory processing. We believe that sufferers may benefit from understanding the physical processes which cause hallucinations. We also believe that a better understanding of hallucinations may lead to a better understanding of schizophrenia and the psychoses, which may in turn help in the development of better ways of treating these illnesses.Read moreRead less
Episodic Memory Dysfunction As A Basis For Auditory Hallucinations In Schizophrenia
Funder
National Health and Medical Research Council
Funding Amount
$278,517.00
Summary
Auditory hallucinations (AHs) occur frequently in people who suffer from schizophrenia. This symptom usually involves hearing voices that the hallucinator firmly believes originate from other people. The voices are often intrusive, abusive and persecutory. They are a source of significant stress and may result in self harm or harm to others. Our investigations will attempt to provide experimental support for the theory that AHs represent a misremembering of voices which were heard in the past. W ....Auditory hallucinations (AHs) occur frequently in people who suffer from schizophrenia. This symptom usually involves hearing voices that the hallucinator firmly believes originate from other people. The voices are often intrusive, abusive and persecutory. They are a source of significant stress and may result in self harm or harm to others. Our investigations will attempt to provide experimental support for the theory that AHs represent a misremembering of voices which were heard in the past. We will do this by attempting to characterise specific problems that hallucinators have in identifying when they heard verbal fragments and who said them. We plan to conduct our investigations at five levels. First, we will determine how accurate hallucinators' memories are for context by the use of special neuropsychological tests. Second, we will find out if hallucinators form more false memories than comparison subjects using a test in which such incorrect recollections occur commonly. Third, we will determine if hallucinators have a tendency to reconstruct the characteristics of false verbal memories in the same way that they reconstruct the characteristics of their hallucinations. Fourth, we will attempt to suppress these false verbal memories and finally, we will characterise those brain regions which are activated during true and false memory formation by using blood flow analysis technology in order to identify networks of brain activity which preferentially malfunction in hallucinating patients. This study provides the prospect of adding substantially to our understanding of the mechanisms underlying auditory hallucinations and to lead to the development of new cognitively-based treatments for the symptom.Read moreRead less
Sensing and Communications for Tactical Radio: Mapping the RF Weather. This project investigates sensing, localisation and communication strategies to improve the performance of modern tactical radio networks. Such networks face all of the well-known design challenges of mobile ad-hoc networks (MANETs) but with added complication of a contested and adversarial operating environment. By exploiting the power of radio nodes to sense the radio spectrum, as well as to communicate over it, a distribut ....Sensing and Communications for Tactical Radio: Mapping the RF Weather. This project investigates sensing, localisation and communication strategies to improve the performance of modern tactical radio networks. Such networks face all of the well-known design challenges of mobile ad-hoc networks (MANETs) but with added complication of a contested and adversarial operating environment. By exploiting the power of radio nodes to sense the radio spectrum, as well as to communicate over it, a distributed network of nodes can create a detailed picture of the surrounding radio-frequency (RF) environment: the nodes can work together to map the “RF weather”. In this project we will design advanced sensing and localisation methods to accurately map the RF spectrum, and then exploit this map in communication system design.Read moreRead less
Supervised autonomy for autonomous underwater vehicles (AUVs) using limited bandwidth communication channels. The project aims to improve the feedback link between an autonomous underwater vehicle (AUV) and an operator by developing novel acoustic communication schemes that exploit developments in machine learning, network, and communication theory and represents a step towards truly autonomous and intelligent surveying using AUV systems.
Opening a New Era of High-Performance Microwave Devices. We propose a conceptually new method of manufacturing high-performance microwave components at the low-cost and short lead time using liquid form conductors and 3D printing technology. Innovation consists in developing surface roughness free waveguide- and coaxial-based RF and microwave devices, in one-single-piece. This technique can be further extended to create high-performance reconfigurable RF and microwave devices such as filters, an ....Opening a New Era of High-Performance Microwave Devices. We propose a conceptually new method of manufacturing high-performance microwave components at the low-cost and short lead time using liquid form conductors and 3D printing technology. Innovation consists in developing surface roughness free waveguide- and coaxial-based RF and microwave devices, in one-single-piece. This technique can be further extended to create high-performance reconfigurable RF and microwave devices such as filters, antennas, directional couplers, phase shifters and switches by manipulating the locations of the liquid conductors. Furthermore, the method will enable the management of heat generated in high-power applications. Australian telecommunication industry and defence will benefit from the outcome of this project.Read moreRead less
Reconfigurable Conformal Antenna Arrays for Broadband in the Sky Networks. The project aims to develop the theory and technology for a novel type of antennas, namely, reconfigurable conformal antenna arrays, for future broadband in the sky networks (BISNets). BISNets are essential to providing digital services to users on the move and in remote areas. The antenna would be conformal to the surface of the mounting platform, and its elements would be reconfigured in situ to generate the optimum rad ....Reconfigurable Conformal Antenna Arrays for Broadband in the Sky Networks. The project aims to develop the theory and technology for a novel type of antennas, namely, reconfigurable conformal antenna arrays, for future broadband in the sky networks (BISNets). BISNets are essential to providing digital services to users on the move and in remote areas. The antenna would be conformal to the surface of the mounting platform, and its elements would be reconfigured in situ to generate the optimum radiation characteristics to suit the radio environment. It is expected that the project would advance the scientific knowledge of space-borne wireless communications and sensing in general, and antennas in particular, and significantly enhance the performance and reduce the cost of BISNets.Read moreRead less
Safeguarding Future Wireless Communications with Physical Layer Security. Wireless communication is vulnerable to eavesdropping attacks since the transmitted signal enters an open wireless medium allowing anyone to overhear it. This project tackles the challenging problem of secure wireless transmissions through the advancement of a new security technology termed physical layer security. Theoretical frameworks are expected to be developed to understand how this new technology extracts the intri ....Safeguarding Future Wireless Communications with Physical Layer Security. Wireless communication is vulnerable to eavesdropping attacks since the transmitted signal enters an open wireless medium allowing anyone to overhear it. This project tackles the challenging problem of secure wireless transmissions through the advancement of a new security technology termed physical layer security. Theoretical frameworks are expected to be developed to understand how this new technology extracts the intrinsic security from the wireless medium to protect the confidentiality of information transmission. The research outcome is expected to provide for innovative solutions to safeguard Australia's future commercial, government and military wireless networks, and to give pivotal insights into the impact of this new technology on national security.Read moreRead less
RAINBOW - RAdIo Networks Based On machine learning for situation aWareness. This project aims to develop software-defined and cognitive radio networks (SDR) to detect adversarial communications and achieve situation awareness on radio frequency (RF) spectrum. The project will generate novel SDR architectures and new attack-resistant detection algorithms through innovative approaches combining machine learning and game theory. Expected outcomes include a strategic alliance between the University ....RAINBOW - RAdIo Networks Based On machine learning for situation aWareness. This project aims to develop software-defined and cognitive radio networks (SDR) to detect adversarial communications and achieve situation awareness on radio frequency (RF) spectrum. The project will generate novel SDR architectures and new attack-resistant detection algorithms through innovative approaches combining machine learning and game theory. Expected outcomes include a strategic alliance between the University of Melbourne and the Northrop Grumman Corporation. Among significant benefits, the project will improve cybersecurity of RF spectrum as a national asset, help protect critical infrastructure relying on wireless networks such as telecommunications and defence, and build skills in cybersecurity and Artificial Intelligence.Read moreRead less