Advanced search    

Search: authors:"Patrick Haggard"

39 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Experimental investigations of control principles of involuntary movement: a comprehensive review of the Kohnstamm phenomenon

The Kohnstamm phenomenon refers to the observation that if one pushes the arm hard outwards against a fixed surface for about 30 s, and then moves away from the surface and relaxes, an involuntary movement of the arm occurs, accompanied by a feeling of lightness. Central, peripheral and hybrid theories of the Kohnstamm phenomenon have been advanced. Afferent signals may be ...

Sanshool on The Fingertip Interferes with Vibration Detection in a Rapidly-Adapting (RA) Tactile Channel

An Asian spice, Szechuan pepper (sanshool), is well known for the tingling sensation it induces on the mouth and on the lips. Electrophysiological studies have revealed that its active ingredient can induce firing of mechanoreceptor fibres that typically respond to mechanical vibration. Moreover, a human behavioral study has reported that the perceived frequency of sanshool-induced ...

Up, Down, Near, Far: An Online Vestibular Contribution to Distance Judgement

(HU) Young Researcher Fellowship Mr. Agoston Torok; European Union Seventh Framework Programme (EU FP7) vere wp1 Dr. Elisa Raffaella Ferre and Prof. Patrick Haggard; BIAL 269/14 Dr. Elisa Raffaella ... Ferre and Prof. Patrick Haggard 2 Brain Imaging Centre, Research Centre for Natural Sciences, Hungarian Academy of Sciences , Budapest , Hungary , 2 Institute of Cognitive Neuroscience, University College

The Sense of Agency as Tracking Control

Does sense of agency (SoA) arise merely from action-outcome associations, or does an additional real-time process track each step along the chain? Tracking control predicts that deviant intermediate steps between action and outcome should reduce SoA. In two experiments, participants learned mappings between two finger actions and two tones. In later test blocks, actions triggered a ...

Viewing the body modulates both pain sensations and pain responses

Viewing the body can influence pain perception, even when vision is non-informative about the noxious stimulus. Prior studies used either continuous pain rating scales or pain detection thresholds, which cannot distinguish whether viewing the body changes the discriminability of noxious heat intensities or merely shifts reported pain levels. In Experiment 1, participants ...

Decoding Intention at Sensorimotor Timescales

The ability to decode an individual's intentions in real time has long been a ‘holy grail’ of research on human volition. For example, a reliable method could be used to improve scientific study of voluntary action by allowing external probe stimuli to be delivered at different moments during development of intention and action. Several Brain Computer Interface applications have ...

Self-touch modulates the somatosensory evoked P100

It has recently been shown that contact between one’s own limbs (self-touch) reduces the perceived intensity of pain, over and above the well-known modulation of pain by simultaneous colocalized tactile input Kammers et al. (Curr Biol 20:1819–1822, 2010). Here, we investigate how self-touch modulates somatosensory evoked potentials (SEPs) evoked by afferent somatosensory input. We ...

Constructing Visual Perception of Body Movement with the Motor Cortex

The human brain readily perceives fluent movement from static input. Using functional magnetic resonance imaging, we investigated brain mechanisms that mediate fluent apparent biological motion (ABM) perception from sequences of body postures. We presented body and nonbody stimuli varying in objective sequence duration and fluency of apparent movement. Three body postures were ...

Multisensory Interactions between Vestibular, Visual and Somatosensory Signals

Vestibular inputs are constantly processed and integrated with signals from other sensory modalities, such as vision and touch. The multiply-connected nature of vestibular cortical anatomy led us to investigate whether vestibular signals could participate in a multi-way interaction with visual and somatosensory perception. We used signal detection methods to identify whether ...

Multisensory Parietal Cortex contributes to Visual Enhancement of Touch in Humans: A Single-Pulse TMS Study

We used transcranial magnetic stimulation (TMS) to investigate how the visual context provided by viewing one's own body influences somatosensory processing. In the visual enhancement of touch (VET) effect, viewing the body enhances tactile acuity relative to viewing a nonbody object. Single-pulse TMS was delivered over anterior intraparietal sulcus (aIPS), which is crucial for ...

What is volition?

Volition refers to the capacity of humans, and other animals, to initiate actions based on internal decision and motivation, rather than external stimulation. It seems unimaginable that a special issue on volition could have occurred in this journal, or another journal of its field, 20 years ago. The long behaviourist period that dominated thinking about brain and behaviour in the ...

Grin and bear it! Neural consequences of a voluntary decision to act or inhibit action

Elisa Filevich 0 Patrick Haggard 0 0 E. Filevich (&) P. Haggard Institute of Cognitive Neuroscience, University College London , London, UK Action inhibition is an important part of everyday human

Food vibrations: Asian spice sets lips trembling

Nobuhiro Hagura 0 Harry Barber 0 Patrick Haggard 0 0 Institute of Cognitive Neuroscience, University College London , London WC1N 3AR , UK Szechuan pepper, a widely used ingredient in the cuisine

There Is No Free Won’t: Antecedent Brain Activity Predicts Decisions to Inhibit

Inhibition of prepotent action is an important aspect of self-control, particularly in social contexts. Action inhibition and its neural bases have been extensively studied. However, the neural precursors of free decisions to inhibit have hardly been studied. We asked participants to freely choose to either make a rapid key press in response to a visual cue, or to transiently ...

Cue integration and the perception of action in intentional binding

‘Intentional binding’ describes the perceived temporal attraction between a voluntary action and its sensory consequence. Binding has been used in health and disease as an indirect measure of awareness of action or agency, that is, the sense that one controls one’s own actions. It has been proposed that binding results from cue integration, in which a voluntary action provides ...

Vestibular-Somatosensory Interactions: Effects of Passive Whole-Body Rotation on Somatosensory Detection

Vestibular signals are strongly integrated with information from several other sensory modalities. For example, vestibular stimulation was reported to improve tactile detection. However, this improvement could reflect either a multimodal interaction or an indirect interaction driven by vestibular effects on spatial attention and orienting. Here we investigate whether natural ...

Ready steady slow: action preparation slows the subjective passage of time

Professional ball game players report the feeling of the ball ‘slowing-down’ before hitting it. Because effective motor preparation is critical in achieving such expert motor performance, these anecdotal comments imply that the subjective passage of time may be influenced by preparation for action. Previous reports of temporal illusions associated with action generally emphasize ...

Vision of the Body Modulates Somatosensory Intracortical Inhibition

The magnitude of somatosensory evoked potentials (SEPs) elicited by simultaneous electrical stimulation of adjacent digits is generally less than the sum of potentials evoked by stimulation of each digit individually. This under-additivity suggests suppression between representations of adjacent skin regions and may reflect a process of lateral inhibition by interneurons in ...

Does My Face FIT?: A Face Image Task Reveals Structure and Distortions of Facial Feature Representation

Haggard 0 0 1 Institute of Cognitive Neuroscience, University College London , London , United Kingdom , 2 Instituto de Telecomunicacoes, Porto Interactive Center, Universidade do Porto , Porto , Portugal

How voluntary actions modulate time perception

neural timing reported here may contribute to computation of agency. Acknowledgments This work was supported by ESRC grant RES000-23-1571, and by a Royal Society University Research Fellowship to Patrick ... Haggard. We would like to thank Matt Longo for helpful comments on this manuscript. Open Access This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which