Dr Petroc Sumner

Athro

Crynodeb ymchwil

Canfyddiad a gweithredu

Sut mae arwyddion gweledol, hyd yn oed rhai nad ydym yn eu canfod, yn ysgogi gweithredoedd? Sut ydyn ni'n rheoli ein hymddygiad fel nad ydyn ni'n ymateb yn adweithiol pan nad ydyn ni eisiau gwneud hynny? Pam mae pobl yn wahanol i'w gilydd yn y mecanweithiau sylfaenol hyn?

Gellir tarfu ar reoli ymddygiad sylfaenol gan niwed i'r ymennydd neu ddirywiad neu anhwylderau meddyliol, ac mae lapiadau'n digwydd yn aml ym mhob un ohonom. Nod ein hymchwil yw ein helpu i ddeall yr union resymau pam.

Rydym yn defnyddio amrywiaeth o ddulliau gyda gwirfoddolwyr a chleifion iach, gan integreiddio mesurau ymddygiadol manwl gywir (gan gynnwys olrhain llygaid) â delweddu (fMRI ac MEG) a sbectrosgopeg.

Gellir gweld adolygiad anarbenigol yn ymwneud â'n gwaith yn: Sumner, P. and Husain, M (2008). Ar ymyl ymwybyddiaeth: actifadu modur awtomatig a rheolaeth wirfoddol. Y Niwrowyddonydd , 14, 474-486. [pdf]. Rydym hefyd yn ysgrifennu erthyglau yn y wasg o bryd i'w gilydd (e.e. rheoli terfysgoedd ; Adroddiad gwyddonol)

Gwyddoniaeth yn y cyfryngau

Yn ddiweddar rydym hefyd wedi lansio prosiect sy'n ymchwilio i ble mae pethau'n mynd o chwith yn y cyfathrebu rhwng gwyddonwyr a newyddiadurwyr, gyda'r bwriad o geisio gwella'r ffordd y caiff ymchwil sy'n gysylltiedig ag iechyd ei adrodd yn y wasg. Gweler insciout.com am fwy o wybodaeth.

Crynodeb addysgu

Lefelau 1 a 2: Rwy'n addysgu darlithoedd rhagarweiniol ar ganfyddiad, seicoleg fiolegol a phrofi damcaniaethau esblygiadol (PS1016 a PS1014), yn rhedeg sesiynau ymarferol canfyddiad (PS2009), ac yn rhoi tiwtorialau ar ymchwil, canfyddiad, gwybyddiaeth a seicoleg annormal (cefnogi PS1014, PS2003, PS2008, PS2009).

Lefel 3: Yn 2011/12 mae Tom Freeman, Simon Rushton a minnau yn cynnig modiwl 20 credyd mewn gweledigaeth a gweithredu, sy'n integreiddio amrywiol bynciau ynghylch sut mae gweithredoedd yn effeithio ar ganfyddiad a sut y defnyddir gwybodaeth weledol i lywio cynlluniau gweithredu anymwybodol ac ymwybodol. Rwy'n goruchwylio prosiectau ar reoli gweithredu a chanfyddiad.

Rwyf hefyd yn gydlynydd i'r myfyrwyr Biowyddoniaeth sy'n astudio modiwlau seicoleg fel rhan o'u llwybr Niwrowyddoniaeth.

Date
Type

2024

Goodwin, N., Powell, G., Loizides, F., Derry-Summer, H., Rajenderkumar, D. and Sumner, P. 2024. Feasibility of gamified visual desensitisation for visually-induced dizziness. Scientific Reports 14, article number: 17864. (10.1038/s41598-024-67745-9)
Bompas, A., Sumner, P. and Hedge, C. 2024. Non-decision time: the Higgs Boson of decision. Psychological Review (10.1037/rev0000487)
Smith, E., Sumner, P. and Powell, G. 2024. The lived experience of people with intellectual disability in community settings: A comparison of self-reports and staff reports. British Journal of Learning Disabilities (10.1111/bld.12629)
McNabb, C. B. et al. 2024. WAND: A multi-modal dataset integrating advanced MRI, MEG, and TMS for multi-scale brain analysis. Scientific Data

2023

Challenger, A., Sumner, P., Powell, E. and Bott, L. 2023. Identifying reasons for non-acceptance of influenza vaccine in healthcare workers: An observational study using declination form data. BMC Health Services Research 23, article number: 1167. (10.1186/s12913-023-10141-2)
Smith, E., Sumner, P., Hedge, C. and Powell, G. 2023. Smart-speaker technology and intellectual disabilities: agency and wellbeing. Disability and Rehabilitation: Assistive Technology 18(4), pp. 432-442. (10.1080/17483107.2020.1864670)
Goodwin, N., Sumner, P., Loizides, F., Derry-Sumner, H., Rajenderkumar, D. and Powell, G. 2023. Balance-Land: a gamified rehabilitation program for people with Persistent Perceptual Postural Dizziness (PPPD) and visual vertigo. [Online]. PsyArXiv: Center for Open Science. (10.31234/osf.io/9gb73) Available at: https://doi.org/10.31234/osf.io/9gb73
Gamble, R., Sumner, P., Wilson-Smith, K., Derry-Summer, H., Rajenderkumar, D. and Powell, G. 2023. Using interpretative phenomenological analysis to probe the lived experiences of persistent postural-perceptual dizziness. Journal of Vestibular Research 33(2), pp. 89-103. (10.3233/VES-220059)

2022

Hedge, C., Powell, G., Bompas, A. and Sumner, P. 2022. Strategy and processing speed eclipse individual differences in control ability in conflict tasks. Journal of Experimental Psychology: Learning, Memory, and Cognition 48(10), pp. 1448-1469. (10.1037/xlm0001028)
Challenger, A., Sumner, P. and Bott, L. 2022. COVID-19 myth-busting: an experimental study. BMC Public Health 22, article number: 131. (10.1186/s12889-021-12464-3)
Powell, G., Penacchio, O., Derry-Sumner, H., Rushton, S. K., Rajenderkumar, D. and Sumner, P. 2022. Visual stress responses to static images are associated with symptoms of Persistent Postural Perceptual Dizziness (PPPD). Journal of Vestibular Research 32(1), pp. 69-78. (10.3233/VES-190578)

2021

Price, A., Sumner, P. and Powell, G. 2021. Subjective sensory sensitivity and its relationship with anxiety in people with probable migraine. Headache 61(9), pp. 1342-1350. (10.1111/head.14219)
Smith, E., Sumner, P., Hedge, C. and Powell, G. 2021. Smart speaker devices can improve speech intelligibility in adults with intellectual disability. International Journal of Language and Communication Disorders 56(3), pp. 583-593. (10.1111/1460-6984.12615)
Sumner, P., Schwartz, L. M., Woloshin, S., Bratton, L. and Chambers, C. D. 2021. Disclosure of study funding and author conflicts of interest in press releases and the news: A retrospective content analysis with two cohorts. BMJ Open 11, article number: e041385. (10.1136/bmjopen-2020-041385)

2020

Hedge, C., Powell, G., Bompas, A. and Sumner, P. 2020. Self-reported impulsivity does not predict response caution. Personality and Individual Differences 167, article number: 110257. (10.1016/j.paid.2020.110257)
Hedge, C., Bompas, A. and Sumner, P. 2020. Task reliability considerations in computational psychiatry. Biological Psychiatry: Cognitive Neuroscience and Neuroimaging 5(9), pp. 837-839. (10.1016/j.bpsc.2020.05.004)
Powell, G., Derry-Sumner, H., Shelton, K., Rushton, S., Hedge, C., Rajenderkuma, D. and Sumner, P. 2020. Visually-induced dizziness is associated with sensitivity and avoidance across all senses. Journal of Neurology 267, pp. 2260-2271. (10.1007/s00415-020-09817-0)
Bompas, A., Campbell, A. E. and Sumner, P. 2020. Cognitive control and automatic interference in mind and brain: A unified model of saccadic inhibition and countermanding. Psychological Review 127(4), pp. 524-561. (10.1037/rev0000181)
Powell, G., Derry-Sumner, H., Rajenderkumar, D., Rushton, S. K. and Sumner, P. 2020. Persistent postural perceptual dizziness is on a spectrum in the general population. Neurology 94(18), pp. e1929-e1938. (10.1212/WNL.0000000000009373)
Szul, M. J., Bompas, A., Sumner, P. and Zhang, J. 2020. The validity and consistency of continuous joystick response in perceptual decision-making. Behavior Research Methods 52, pp. 681-693. (10.3758/s13428-019-01269-3)
Perquin, M. N., Yang, J., Teufel, C., Sumner, P., Hedge, C. and Bompas, A. 2020. Inability to improve performance with control shows limited access to inner states. Journal of Experimental Psychology: General 149(2), pp. 249–274. (10.1037/xge0000641)
Bratton, L., Adams, R. C., Challenger, A., Boivin, J., Bott, L., Chambers, C. D. and Sumner, P. 2020. Causal claims about correlations reduced in press releases following academic study of health news. Wellcome Open Research 5, article number: 6. (10.12688/wellcomeopenres.15647.1)

2015

Megardon, G., Tandonnet, C., Sumner, P. and Guillaume, A. 2015. Limitations of short range Mexican hat connection for driving target selection in a 2D neural field: activity suppression and deviation from input stimuli. Frontiers in Computational Neuroscience 9, article number: 128. (10.3389/fncom.2015.00128)
Bompas, A. and Sumner, P. 2015. Saccadic inhibition and the remote distractor effect: One mechanism or two?. Journal of Vision 15(6), pp. 516-525., article number: 15. (10.1167/15.6.15)
Harrison, J. J., Sumner, P., Dunn, M. J., Erichsen, J. T. and Freeman, T. C. A. 2015. Quick phases of infantile nystagmus show the saccadic inhibition effect. Investigative Ophthalmology & Visual Science 56(3), pp. 1594-1600. (10.1167/iovs.14-15655)
Powell, G., Sumner, P. and Bompas, A. 2015. The effect of eye movements and blinks on afterimage appearance and duration. Journal of Vision 15(3), pp. 1-15., article number: 20. (10.1167/15.3.20)
Bompas, A., Sumner, P., Muthumumaraswamy, S. D., Singh, K. D. and Gilchrist, I. D. 2015. The contribution of pre-stimulus neural oscillatory activity to spontaneous response time variability. NeuroImage 107, pp. 34-45. (10.1016/j.neuroimage.2014.11.057)
Harrison, J. J., Freeman, T. C. A. and Sumner, P. 2015. Saccadic compensation for reflexive optokinetic nystagmus just as good as compensation for volitional pursuit. Journal of Vision 15(1), article number: 24. (10.1167/15.1.24)

2014

Sumner, P. et al. 2014. The association between exaggeration in health related science news and academic press releases: Retrospective observational study. The BMJ 349, article number: g7015. (10.1136/bmj.g7015)
Harrison, J. J., Freeman, T. C. A. and Sumner, P. 2014. Saccade-like behavior in the fast-phases of optokinetic nystagmus: An illustration of the emergence of volitional actions from automatic reflexes. Journal of Experimental Psychology: General 143(5), pp. 1923-1938. (10.1037/a0037021)
Campbell, A., Sumner, P., Singh, K. D. and Muthukumaraswamy, S. D. 2014. Acute effects of alcohol on stimulus-induced gamma oscillations in human primary visual and motor cortices. Neuropsychopharmacology -New York- 39(9), pp. 2104-2113. (10.1038/npp.2014.58)
Allen, C. P. G., Sumner, P. and Chambers, C. D. 2014. The timing and neuroanatomy of conscious vision as revealed by TMS-induced blindsight. Journal of Cognitive Neuroscience 26(7), pp. 1507-1518. (10.1162/jocn_a_00557)
Boy, F. and Sumner, P. 2014. Visibility predicts priming within but not between people: A cautionary tale for studies of cognitive individual differences. Journal of Experimental Psychology: General 143(3), pp. 1011-1025. (10.1037/a0034881)
Allen, C. et al. 2014. Enhanced awareness followed reversible inhibition of human visual cortex: a combined TMS, MRS and MEG study. PLoS ONE 9(6), pp. e100350. (10.1371/journal.pone.0100350)
Seiss, E., Klippel, M., Hope, C., Boy, F. and Sumner, P. 2014. The relationship between reversed masked priming and the tri-phasic pattern of the lateralised readiness potential. PLoS ONE 9(4), article number: e93876. (10.1371/journal.pone.0093876)
Sumner, P. 2014. Probabilistic antecedents of voluntary action are essential components of decision processes.. Cognitive Neuroscience 5(3/4), pp. 210-212. (10.1080/17588928.2014.949650)

2013

Hodgson, T. L., Sumner, P., Molyva, D., Sheridan, R. and Kennard, C. 2013. Learning and switching between stimulus-saccade associations in Parkinson's disease. Neuropsychologia 51(7), pp. 1350-1360. (10.1016/j.neuropsychologia.2013.03.026)
Evans, C. J. et al. 2013. Subtraction artifacts and frequency (Mis-)alignment in J-difference GABA editing. Journal of Magnetic Resonance Imaging 38(4), pp. 970-975. (10.1002/jmri.23923)
Budnik, U., Bompas, A. and Sumner, P. 2013. Perceptual strength is different from sensorimotor strength: Evidence from the centre-periphery asymmetry in masked priming. The Quarterly Journal of Experimental Psychology 66(1), pp. 15-22. (10.1080/17470218.2012.741605)
Bompas, A., Kendall, G. E. and Sumner, P. 2013. Spotting fruit versus picking fruit as the selective advantage of human colour vision. Perception 4(2), pp. 84-94. (10.1068/i0564)
Bompas, A., Powell, G. and Sumner, P. 2013. Systematic biases in adult color perception persist despite lifelong information sufficient to calibrate them. Journal of Vision 13(1), article number: 19. (10.1167/13.1.19)
McBride, J., Sumner, P., Jackson, S. R., Bajaj, N. and Husain, M. 2013. Exaggerated object affordance and absent automatic inhibition in alien hand syndrome. Cortex 49(8), pp. 2040-2054. (10.1016/j.cortex.2013.01.004)

2012

Powell, G., Bompas, A. and Sumner, P. 2012. Making the incredible credible: Afterimages are modulated by contextual edges more than real stimuli. Journal of Vision 12(10), article number: 17. (10.1167/12.10.17)
McBride, J., Sumner, P. and Husain, M. 2012. Conflict in object affordance revealed by grip force. The Quarterly Journal of Experimental Psychology 65(1), pp. 13-24. (10.1080/17470218.2011.588336)
McBride, J., Boy, F., Husain, M. and Sumner, P. 2012. Automatic motor activation in the executive control of action. Frontiers in Human Neuroscience 6, article number: 82. (10.3389/fnhum.2012.00082)
Powell, G., Bompas, A. and Sumner, P. 2012. In pursuit of afterimage perception: Interactions with eye movements and contours. Perception 41(S), pp. 177-177. (10.1068/v120280)

2011

Bompas, A. and Sumner, P. 2011. Saccadic inhibition reveals the timing of automatic and voluntary signals in the human brain. The Journal of Neuroscience 31(35), pp. 12501-12512. (10.1523/JNEUROSCI.2234-11.2011)
Boy, F., Evans, C. J., Edden, R. A. E., Lawrence, A. D., Husain, M., Singh, K. D. and Sumner, P. 2011. Dorsolateral Prefrontal γ-Aminobutyric Acid in Men Predicts Individual Differences in Rash Impulsivity. Biological Psychiatry 70(9), pp. 866-872. (10.1016/j.biopsych.2011.05.030)
Sumner, P. 2011. Determinants of saccadic latency. In: Liversedge, S., Gilchrist, I. and Everling, S. eds. The Oxford Handbook of Eye Movements. Oxford: Oxford University Press, pp. 413-424.
Powell, G., Bompas, A. and Sumner, P. 2011. Hues being framed and the nulling of the afterimage [Abstract]. Perception 40(S), pp. 199-199. (10.1068/v110629)
Bompas, A., Powell, G. and Sumner, P. 2011. Colour perception across the visual field: No mastery of sensorimotor contingencies [Abstract]. Perception 40(S), pp. 10-10. (10.1068/v110403)

2010

Boy, F., Evans, C. J., Edden, R. A. E., Singh, K. D., Husain, M. and Sumner, P. 2010. Individual differences in subconscious motor control predicted by GABA concentration in SMA. Current Biology 20(19), pp. 1779-1785. (10.1016/j.cub.2010.09.003)
Boy, F. and Sumner, P. 2010. Tight coupling between positive and reversed priming in the masked prime paradigm.. Journal of Experimental Psychology: Human Perception and Performance 36(4), pp. 892-905. (10.1037/a0017173)
Sumner, P., Edden, R. A. E., Bompas, A., Evans, C. J. and Singh, K. D. 2010. More GABA, less distraction: a neurochemical predictor of motor decision speed. Nature Neuroscience 13(7), pp. 825-827. (10.1038/nn.2559)
Boy, F., Husain, M. and Sumner, P. 2010. Unconscious inhibition separates two forms of cognitive control. Proceedings of the National Academy of Sciences 107(24), pp. 11134-11139. (10.1073/pnas.1001925107)
Boy, F., Husain, M., Singh, K. D. and Sumner, P. 2010. Supplementary motor area activations in unconscious inhibition of voluntary action. Experimental Brain Research 206(4), pp. 441-448. (10.1007/s00221-010-2417-x)
Anderson, E. J., Mannan, S. K., Rees, G., Sumner, P. and Kennard, C. 2010. Overlapping functional anatomy for working memory and visual search. Experimental Brain Research 200(1), pp. 91-107. (10.1007/s00221-009-2000-5)
Hermens, F., Sumner, P. and Walker, R. 2010. Inhibition of masked primes as revealed by saccade curvature. Vision Research 50(1), pp. 46-56. (10.1016/j.visres.2009.10.008)

2009

Bompas, A. and Sumner, P. 2009. Oculomotor Distraction by Signals Invisible to the Retinotectal and Magnocellular Pathways. Journal of Neurophysiology 102(4), pp. 2387-2395. (10.1152/jn.00359.2009)
Bompas, A. and Sumner, P. 2009. Temporal dynamics of saccadic distraction. Journal of Vision 9(9), article number: 17. (10.1167/9.9.17)

2008

Anderson, E. J., Husain, M. and Sumner, P. 2008. Human intraparietal sulcus (IPS) and competition between exogenous and endogenous saccade plans. Neuroimage 40(2), pp. 838-851. (10.1016/j.neuroimage.2007.10.046)
Anderson, E. J., Mannan, S. K., Rees, G., Kennard, C. and Sumner, P. 2008. A Role for Spatial and Nonspatial Working Memory Processes in Visual Search. Experimental Psychology 55(5), pp. 301-312. (10.1027/1618-3169.55.5.301)
Bompas, A., Sterling, T., Rafal, R. D. and Sumner, P. 2008. Naso-temporal asymmetry for signals invisible to the retinotectal pathway. Journal of Neurophysiology 100(1), pp. 412-421. (10.1152/jn.90312.2008)
Bompas, A. and Sumner, P. 2008. Sensory sluggishness dissociates saccadic, manual, and perceptual responses: An S-cone study. Journal of Vision 8(8), pp. 1-13. (10.1167/8.8.10)
Boy, F., Clarke, K. and Sumner, P. 2008. Mask stimulus triggers inhibition in subliminal visuomotor priming. Experimental Brain Research 190(1), pp. 111-116. (10.1007/s00221-008-1515-5)
Sumner, P. 2008. Mask-induced priming and the negative compatibility effect. Experimental Psychology 55(2), pp. 133-141. (10.1027/1618-3169.55.2.133)
Sumner, P., Anderson, E. J., Sylvester, R., Haynes, J. D. and Rees, G. 2008. Combined orientation and colour information in human V1 for both L-M and S-cone chromatic axes. NeuroImage 39(2), pp. 814-824. (10.1016/j.neuroimage.2007.09.013)
Sumner, P. and Brandwood, T. 2008. Oscillations in Motor Priming: Positive Rebound Follows the Inhibitory Phase in the Masked Prime Paradigm. Journal of Motor Behavior 40(6), pp. 484-490. (10.3200/JMBR.40.6.484-490)
Sumner, P. and Husain, M. 2008. At the Edge of Consciousness: Automatic Motor Activation and Voluntary Control. The Neuroscientist 14(5), pp. 474-486. (10.1177/1073858408314435)

2007

Sumner, P., Nachev, P., Morris, P., Peters, A. M., Jackson, S. R., Kennard, C. and Husain, M. 2007. Human medial frontal cortex mediates unconscious inhibition of voluntary action. Neuron 54(5), pp. 697-711. (10.1016/j.neuron.2007.05.016)
Sumner, P. 2007. Negative and positive masked-priming - implications for motor inhibition. Advances in Cognitive Psychology 3(1-2), pp. 317-326. (10.2478/v10053-008-0033-0)
Anderson, E. J. et al. 2007. Involvement of prefrontal cortex in visual search. Experimental Brain Research 180(2), pp. 289-302. (10.1007/s00221-007-0860-0)

2006

Sumner, P., Tsai, P., Yu, K. and Nachev, P. 2006. Attentional modulation of sensorimotor processes in the absence of perceptual awareness. Proceedings of the National Academy of Sciences of the United States of America (PNAS) ISSN 1091-6490 103(27), pp. 10520-10525. (10.1073/pnas.0601974103)
Sumner, P., Nachev, P., Castor-Perry, S., Isenman, H. and Kennard, C. 2006. Which visual pathways cause fixation-related inhibition?. Journal of Neurophysiology 95(3), pp. 1527-1536. (10.1152/jn.00781.2005)
Sumner, P. and Ahmed, L. 2006. Task switching: the effect of task recency with dual- and single-affordance stimuli. Quarterly Journal of Experimental Psychology 59(7), pp. 1255-1276. (10.1080/02724980543000187)
Sumner, P. 2006. Inhibition versus attentional momentum in cortical and collicular mechanisms of IOR. Cognitive Neuropsychology 23(7), pp. 1035-1048. (10.1080/02643290600588350)
Sumner, P. 2006. Seeing colour. Advances in Clinical Neuroscience & Rehabilitation 6(3), pp. 12-13.

2005

Sumner, P., Arrese, C. A. and Partridge, J. C. 2005. The ecology of visual pigment tuning in an Australian marsupial: the honey possum Tarsipes rostratus. Journal of Experimental Biology 208(10), pp. 1803-1815. (10.1242/jeb.01610)
Orfanidou, E. and Sumner, P. 2005. Language switching and the effects of orthographic specificity and response repetition. Memory & Cognition 33(2), pp. 355-369. (10.3758/BF03195323)

2004

Sumner, P., Nachev, P., Vora, N., Husain, M. and Kennard, C. 2004. Distinct cortical and collicular mechanisms of inhibition of return revealed using S cone stimuli. Current Biology 14(24), pp. 2259-2263. (10.1016/j.cub.2004.12.021)

2003

Monsell, S., Sumner, P. and Waters, H. 2003. Task-set reconfiguration with predictable and unpredictable task switches. Memory & Cognition 31(3), pp. 327-342. (10.3758/BF03194391)
Sumner, P. and Mollon, J. D. 2003. Colors of primate pelage and skin: Objective assessment of conspicuousness. American Journal of Primatology 59(2), pp. 67-91. (10.1002/ajp.10066)
Sumner, P. and Mollon, J. D. 2003. Did trichromacy evolve for frugivory or folivory?. In: Mollon, J. D., Pokorny, J. and Knoblauch, K. eds. Normal and Defective Colour Vision. Oxford: Oxford University Press, pp. 21-30., (10.1093/acprof:oso/9780198525301.003.0003)
Smithson, H. E., Sumner, P. and Mollon, J. D. 2003. How to find a tritan line. In: Mollon, J. D., Pokorny, J. and Knoblauch, K. eds. Normal and Defective Colour Vision. Oxford: Oxford University Press, pp. 279-287.

2002

Sumner, P., Adamjee, T. and Mollon, J. 2002. Signals invisible to the collicular and magnocellular pathways can capture visual attention. Current Biology 12(15), pp. 1312-1316. (10.1016/S0960-9822(02)01020-5)
Sumner, P. 2002. Colour vision: why are we primates unique?. Eye News 8, pp. 48-60.

2000

Sumner, P. and Mollon, J. D. 2000. Chromaticity as a signal of ripeness in fruits taken by primates. Journal of Experimental Biology 203(13), pp. 1987-2000.
Sumner, P. and Mollon, J. D. 2000. Catarrhine photopigments are optimized for detecting targets against a foliage background. Journal of Experimental Biology 203(13), pp. 1963-1986.

Pynciau ymchwil a phapurau cysylltiedig

Gweler ef, chrafangia ef: Rheoli ymddygiad synhwyryddyddion awtomatig mewn iechyd a chlefydau (a ariennir gan Ymddiriedolaeth Wellcome, ac ar y cyd ag UCL).

Sut mae'r ymennydd yn rheoli'r cysylltiadau rhwng canfyddiad a gweithredu, a beth sy'n digwydd pan fydd niwed i'r ymennydd yn tarfu ar reolaeth o'r fath? Yn draddodiadol, mae'r rheolaeth o weithredu wedi'i wahanu'n brosesau awtomatig a gwirfoddol. Ein rhagdybiaeth yw bod y ddau weithgaredd hyn mewn gwirionedd yn gysylltiedig yn anochel. Mae gwrthrychau gweledol yn actifadu cynlluniau modur (prime) yn awtomatig sy'n hwyluso gweithredoedd tuag at y gwrthrychau hyn. Ond os na fydd ein gweithredoedd bob amser yn cael eu gyrru gan symbyliadau amgylcheddol, rhaid atal primio o'r fath i ganiatáu nodau amgen . Rydym am ddeall sut mae prosesau rheoli awtomatig yn cael eu cynnwys mewn rheolaeth mor hyblyg, 'wirfoddol' o ymddygiad, a pham mae unigolion yn wahanol yn eu gallu i reoli ymddygiad sylfaenol. Rydym yn defnyddio tasgau ymddygiadol mewn pobl iach a difrodi ymennydd, ac yn defnyddio'r cyfleusterau delweddu yn CUBRIC.

Sut mae penderfyniadau symudiad llygaid yn cael eu gwneud? (Ailgyfeiriad oddi wrth ESRC)

Er mwyn egluro penderfyniadau heb droi at asiant deallus ar wahân (y broblem homunculus), rhaid i ni dybio eu bod yn codi o ryw gyfuniad o fewnbwn synhwyraidd (tystiolaeth), y cyflwr deinamig y mae'r ymennydd ynddo pan fydd y mewnbynnau hynny'n cyrraedd (gan gynnwys cof, gôl-wladwriaethau ac ati), a rhywfaint o sŵn ar hap. Mae pob model o wneud penderfyniadau yn rhagweld integreiddio'r cynhwysion hyn i mewn i gronni gweithgaredd o blaid un dewis neu'r llall. Cyn gynted ag y bydd y casgliad ar gyfer un dewis yn cyrraedd trothwy, gwneir y penderfyniad. Rydym yn defnyddio'r term ymbarél "cyntaf i'r trothwy" i gyfeirio at y ffordd hon o wneud penderfyniadau cysyniadol.

Felly, dylai'r tebygolrwydd o weithred syml gael ei dewis ddibynnu ar ba mor gyflym y mae'r broses gronni ar gyfer y weithred honno'n tueddu i gyrraedd trothwy. Mae hyn hefyd yn elfen allweddol yn yr amser y mae'n ei gymryd i gychwyn y weithred. Felly, dylid cysylltu'r dewis ag amseroedd ymateb. Fodd bynnag, mae'r syniad cyntaf i'r trothwy mor eang ac mor reddfol fel bod y rhagfynegiad sylfaenol hwn wedi'i anwybyddu, er bod ganddo'r pŵer i wrthdroi'r holl fodelau cyfredol, yn wir ein cysyniad cyfan o sut y gall ymennydd wneud penderfyniadau. Ac eto mae ein data rhagarweiniol yn awgrymu bod y rhagfynegiad yn anghywir.

Pam nad ydyn ni'n gweld beth mae ein llygaid yn ei ddweud wrthym? (Ailgyfeiriad oddi wrth ESRC)

Mae ein llygaid a'n system weledol yn cyflwyno ystumiadau ac amherffeithrwydd amrywiol i'r ddelwedd weledol, ond mae ein canfyddiad bob dydd yn ymddangos yn imiwn iddynt. Sut mae hyn yn cael ei gyflawni? Rydym yn ymchwilio i ddwy agwedd ar y mater hwn: 1) sut mae pigment macwlaidd yn y retina yn dylanwadu ar ganfyddiad lliw? 2) Pam nad ydyn ni'n gweld ôl-effeithiau lliw trwy'r amser, er eu bod yn gyflym ac yn hawdd eu hennyn mewn arddangosiadau (a pham maen nhw'n mynd i ffwrdd neu'n dod yn ôl pan fyddwn ni'n cysylltu?)

Dylanwadau awtomatig ar gynllunio symudiad llygaid a sifftiau sylwgar

Mae arbrofion cysylltiedig amrywiol yn parhau yn y categori hwn, gan gynnwys: 1) ymchwiliadau i effeithiau tynnu saccade a'u perthynas â GABA (niwrodrosglwyddydd ataliol); 2) sbardunau sylwadol is-liminal a'r llwybr retinotectal 3) sut mae crymedd saccade yn gysylltiedig ag atal ymateb; 4) sut mae cynlluniau saccade yn ymdopi â nystagmus (a yw'r systemau gwirfoddol yn gwybod beth mae'r systemau awtomatig iscortical yn ei wneud?)

Cyllid

ESRC (2013-2016, £633,613) Fframwaith a phecyn cymorth ar gyfer deall camau byrbwyll. Petroc Sumner, Aline Bompas, Chris Chambers, Casimir Ludwig, Frederick Verbruggen, Fred Boy.
ESRC (2103-2016) Ysgoloriaeth sy'n gysylltiedig â grantiau: Rôl hyblygrwydd mewn byrbwylltra. Petroc Sumner, Chris Chambers.
ESRC (2103-2016) Ysgoloriaeth sy'n gysylltiedig â grantiau: Rôl hyblygrwydd mewn byrbwylltra. Petroc Sumner, Chris Chambers.
Sefydliad BIAL (39K Euro) Niwrocemeg gwybyddiaeth a gwneud penderfyniadau amhriodol sy'n gysylltiedig â gamblo: dull delweddu amlfoddol. PI Fred Boy
Gwobr efrydiaeth Ymchwil Alcohol y DU (ARUK) (2012-2015) 'Gwahaniaethau unigol yn effaith alcohol ar reolaeth wybyddol.'
Cymdeithas Seicoleg Prydain (2012) 'A yw datganiadau i'r wasg ar fai wrth gamgyfathrebu gwyddoniaeth?' £3,400.
Gwobr Gwerth mewn Pobl Ymddiriedolaeth Wellcome (goruchwyliwr/noddwr Fred Boy). £40500 (2011-2012).
Grant prosiect Ymddiriedolaeth Wellcome (2009-2012, £426 191): Gweler ef, chrafangia ef: Rheoli ymddygiad synhwyrydd awtomatig mewn iechyd a chlefydau. Petroc Sumner, Masud Husain, Krish Singh, Bob Rafal. Cymdeithion Ymchwil : Fred Boy (Caerdydd) a Jen McBride (UCL)
Grant prosiect ESRC (2009-2010, £82 039) Yn cael ei newid mewn lliw canfyddedig pan fyddwn yn symud ein llygaid. Petroc Sumner ac Aline Bompas.
Grant Prosiect BBSRC, (2005-2008, £194 578):Defnyddio conau S i ymchwilio i rôl y gwrthdaro uwch mewn prosesau gweledol awtomatig. Petroc Sumner a Masud Husain. Cyswllt Ymchwil: Elaine Anderson ac Aline Bompas
Grantiau peilot WICN (2007-2009, £33K) Rheoli awtomatiaeth ac awtomatiaeth rheolaeth; Dylanwad meysydd llygaid blaen ar ganfyddiad cyferbyniad ; GABA ac ataliad sacade.
Rydym hefyd wedi derbyn cefnogaeth gan ysgoloriaethau haf Nuffield a Wellcome, a grantiau teithio a phrosiectau bach gan y Gymdeithas Frenhinol .

Cydweithredwyr ymchwil

Mewnol

Krish Singh (pob agwedd ddelweddu ar ein prosiectau).
Chris Chambers a'r tîm (prosiect sylw a TMS).
Suresh Muthukumaraswamy (arbrofion MEG)
John Evans (fMRI a MR sbectrosgopeg)
Tom Freeman (nystagmus, pursuit llyfn a saccades)
Simon Rushton (anghysonderau gweledol yn Clefyd Huntingdon, fMRI o wrthrychau sy'n symud)
Bill Macken a Dylan Jones (motor activation by auditory sequences)
Ursula Budnik, Chris Allen, Georgina Powell, Sian Griffiths, David Maidment.James Harrison (myfyrwyr PhD; gweler Tudalen Ôl-raddedig).

Allanol

Aline Bompas
Fred Boy
Masud Husain a Jen Mcbride (Sefydliad Niwroleg a Sefydliad Niwrowyddoniaeth Gwybyddol, UCL, Llundain; Prosiect 'See it, grab it')
Bob Rafal (Bangor; astudiaethau cleifion)
Richard Edden (John Hopkins, Baltimore; MR sbectrosgopeg)
Robin Walker a Frouke Hermens (Royal Holloway; crymedd ac atal saccade)
Iain Gilchrist (Bryste; amrywioldeb latency'r saaccade)
Elaine Anderson (Optometrydd ac UCL; yn flaenorol Post-doc ar grant BBSRC)
Parashkev Nachev (Sefydliad Niwroleg; rheolaeth, ataliad a gwrthdaro)
Monica Busse-Morris (Ffisiotherapi, Caerdydd; anghysonderau gweledol yn Clefyd Huntingdon)

Addysg

1996: BA mewn Gwyddorau Naturiol, Dosbarth 1af, Prifysgol Caergrawnt. Ysgoloriaeth Sylfaen, Ysgoloriaeth Caldwell a'r Bishop Green Cup.
2000: PhD, Adran Seicoleg Arbrofol, Prifysgol Caergrawnt. Cyfarwyddwyd gan J.D. Mollon.
2003: Diploma Coleg Imperial, Llundain, mewn Astudiaethau Uwch mewn Dysgu ac Addysgu.

Anrhydeddau a dyfarniadau

Medal David Marr, Cymdeithas Gweledigaeth Gymhwysol.

Aelodaethau proffesiynol

2003: Y Gymdeithas Seicoleg Arbrofol
2004: Academi Addysg Uwch
2005: Cymdeithas Gweledigaeth Gymhwysol
2007: Cymdeithas Ffisiolegol America
2009: Coleg adolygu cymheiriaid ESRC

Safleoedd academaidd blaenorol

Cyflogaeth

2000-2006: Darlithydd, Is-adran Niwrowyddoniaeth a Meddygaeth Seicolegol, Coleg Imperial Llundain.
2006-presennol: Darlithydd/Uwch Ddarlithydd/Darllenydd, Ysgol Seicoleg, Prifysgol Caerdydd

Dyletswyddau eraill

Adolygiad o'r grant: BBSRC; ESRC; MRC; Ymddiriedolaeth Wellcome; Cyngor Ymchwil Awstralia; National Science Foundation (UDA); NWO (Yr Iseldiroedd).

Golygydd Ymgynghorol ar gyfer JEP, HPP.

Adolygu cyfnodolion (23 o gyfnodolion gwahanol, gan gynnwys Gwyddoniaeth, PNAS, Current Biology, Neuron, J. neuroscience).

Sgyrsiau a symposia gwahoddedig (e.e. Prifysgol Gorllewin Awstralia, Perth; Prifysgol Queensland, Brisbane; Prifysgol Geneva; Rank Prize Fund, Kingston (Canada), John Hopkins (Baltimore), AVA, BOMG, HBM, ICON, ECEM)

Arholiad PhD (mewnol ac allanol).

Goruchwyliaeth gyfredol

Rebecca Oates

Myfyriwr ymchwil

Contact Details

SumnerP@caerdydd.ac.uk
+44 29208 70091
Adeilad y Tŵr, Plas y Parc, Caerdydd, CF10 3AT