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Department of Cognitive Science

Dr Paul Sowman

BPhty Otago, PGDipHSci Auckland, PhD Adelaide.

Paul Sowman

ARC Discovery Early Career Researcher Award (DECRA)

Contact Details

Office : 3.824
Phone : +61 2 9850 6732
Fax : +61 2 9850 6059
email : paul.sowman@mq.edu.au
Homepage : http://www.maccs.mq.edu.au/research/projects/stuttering/

External Address

Department of Cognitive Science
Australian Hearing Hub
16 University Avenue
Macquarie University NSW 2109

I also have a profile at the ARC Centre for Excellence in Cognition and its Disorders.

Profile

My research interest is in how the nervous system controls movement. I have a particular interest in motor control of the jaw and mouth. In my research I use electromyography (EMG), transcranial magnetic stimulation (TMS), electroencephalography (EEG) and Magnetoencephalography (MEG). I am currently investigating sensorimotor integration in stuttering.

I received my PhD from the Discipline of Physiology, University of Adelaide under the supervision of Prof. Kemal S Turker, looking at the role of afferent feedback from the teeth in human orofacial motor control. Since then I have undertaken research postings at the Neuromuscular Laboratory, University of Adelaide, the Center for Sensory Motor Interaction, Aalborg University and the Center for Brain Research, Ege University.

Awards

  • Promotion to Senior Lecturer (Level C) (2013), Sowman, P.
  • Promotion to Lecturer (Level B) (2011), Sowman, P.
  • Finalist in the Macquarie University Research Awards Early Career Researcher of the Year (2011), Sowman, P.

Grants Awarded

  • ARC CCD Cross Program Support Scheme (2015) "The effect of brain stimulation on reading training in dyslexia." McArthur, G., Sowman, P., Bishop, D., Savage, G., Caruana, N., & Francis, D. ($39,000)
  • Macquarie University Faculty of Human Sciences Research Centre Scheme (2014 - 2017) "Perception in Action Research Centre (PARC)" Rich, A., Finkbeiner, M., Williams, M., Carlson, T., Sowman, P., Brooks, K., Coltheart, V., Curby, K., & Stevenson, R.J. ($30,000)
  • Macquarie University Strategic Infrastructure Scheme Grant (2014) "Articulograph for speech research." Proctor, M., Biedermann, B., Cox, F., Cupples, L., Demuth, K., Harrison, E., Johnson, B., Kinoshita, S., Lin, S., Mannell, R., Nickels, L., Palethorpe, S., Sharma, M., Sowman, P., Thompson, B., Tsukada, K., Yuen, I., & Xu, N. ($75,915)
  • Macquarie University Faculty of Human Sciences Equipment Grant Scheme (2014) "A magstim brain stimulation system for home-based treatment trials." McArthur, G., Sowman, P., Savage, G., Caruana, N., & Francis, D. ($10,000)
  • Macquarie University Research Infrastructure Block Grant (2013) "A transcranial direct current stimulator (tDCS) for the study of brain function in human cognition disorders." Sowman, P., Thompson, W.F., Johnson, B., McCarthy-Jones, S., Nickels, L., & Tawadros, P. ($58,322)
  • ARC Discovery Early Career Research Award [DE130100868] (2013 - 2015) "Neural mechanisms of inhibitory control of human speech in stutterers and non-stutterers." Sowman, P. ($336,284)
  • Macquarie University Faculty of Human Sciences Equipment Grant Scheme (2013) "Chin and forehead supports for TMS experiments." Finkbeiner, M., Williams, M., Sowman, P., & Seymour, K. ($5,920)
  • Macquarie University Faculty of Human Sciences Equipment Grant Scheme (2013) "Stand for TMS coil." Sowman, P., Coltheart, M., & Barnier, A. ($5,609)
  • Macquarie University Faculty of Human Sciences Open Access Journal Assistance Scheme (2013) "Self-initiation and temporal cueing of monaural tones reduce the auditory N1 and P2" (Experimental Brain Research). Sowman, P. ($3,365)
  • ARC CCD Cross Program Support Scheme (2012) "Powering up the right hemisphere when words fail: Augmenting melodic intonation therapy (MIT) with non-invasive brain stimulation to treat impaired left-hemisphere function." Thompson, W., Sowman, P., Savage, G., Nickels, L., & Hodges, J. ($14,000)
  • NHMRC Project Grant [APP1003760] (2011 - 2013) "Brain dynamics and sensorimotor integration associated with speech production in humans who stutter." Sowman, P., Johnson, B., Harrison, E., & Crain, S. ($294,884)
  • Faculty of Human Sciences International Visiting Research Fellowship (2011) for the visit of Dr Christopher Chambers. Sowman, P. ($6,000)
  • MQSIS/NHMRC Equipment grant (2011) TMS Manager; real-time TMS navigation system. Sowman, P. ($16,000)
  • Macquarie University Research Infrastructure Block Grant Scheme (2010) "A virtual reality setup for studying hand movements." Williams, M.A., Friedman, J., Finkbeiner, M., Thompson, W., Johnson, B., Brooks, K., Sowman, P. ($70,000)
  • Macquarie University Research Infrastructure Block Grant Scheme (2010) "A dual pulse magnetic stimulator for the study of brain excitation and inhibition in human movement studies." Sowman, P., Finkbeiner, M., Crain, S., Harrison, E., Cox, F., Brock, J., Savage, G., Johnson, B., Friedman, J., Mannell, R. ($75,000)
  • Macquarie University Safety Net Scheme (2010) "Cortical activation and connectivity evoked by speech motor planning in adult and very young stutterers." Sowman, P.F. ($15,000)
  • Macquarie University Research and Development Grant (2009 - 2011) "Investigating Brain Anomalies in Stuttering With Transcranial Magnetic Stimulation" Sowman, P.F. & Johnson B.W. ($46,025)
  • NHMRC Postdoctoral Training Fellowship (2009 - 2012) "Cortical networks that integrate auditory input and speech motor output in human stutterers." Sowman, P. ($285,000)
  • NHMRC Equipment Grant (2009 - 2010) "A system for measuring somatosensation and cutaneous reflexes in humans during speech." Sowman, P.F. ($10,162)
  • Macquarie University New Staff Scheme (2009 - 2010) "The lateralisation of speech control processes in the brains of young stutterers." Sowman, P.F. ($19,955)

Media Engagement

Selected Publications

Periodicals

  • Al-Janabi, S., Nickels, L.A., Sowman, P.F., Burianová, H., Merrett, D.L., & Thompson, W.F. (2014). Augmenting melodic intonation therapy with non-invasive brain stimulation to treat impaired left-hemisphere function: two case studies. Frontiers in Psychology, 5, 37. doi:10.3389/fpsyg.2014.00037
  • Chiou, R., Sowman, P.F., Etchell, A., & Rich, A.N. (2014). A conceptual lemon: theta burst stimulation to the left anterior temporal lobe untangles object representation and its canonical color. Journal of Cognitive Neuroscience, 26(5), 1066-1074.
  • Etchell, A.C., Johnson, B.W., & Sowman, P.F. (2014). Behavioral and multimodal neuroimaging evidence for a deficit in brain timing networks in stuttering: A hypothesis and theory. Frontiers in Human Neuroscience, 8, 467. doi:10.3389/fnhum.2014.00467
  • Sowman, P., Crain, S., Harrison, E., & Johnson, B.W. (2014). Lateralization of brain activation in fluent and non-fluent preschool children: A magnetoencephalographic study of picture-naming. Frontiers in Human Neuroscience, 8, 354. doi: 10.3389/fnhum.2014.00354
  • Burianova, H., Marstaller, L., Sowman, P., Tesan, G., Rich, A.N., Williams, M., Savage, G., & Johnson, B.W. (2013). Multimodal functional imaging of motor imagery using a novel paradigm. Neuroimage, 71, 50-58.
  • Sowman, P.F., Kuusik, A., & Johnson, B.W. (2013). Self-initiation and temporal cueing of monaural tones reduce the auditory N1 and P2. Experimental Brain Research, 222(1-2), 149-157. doi:10.1007/s00221-012-3204-7
  • Ng, T., Sowman, P., Brock, J., & Johnson, B.W. (2013). Neuromagnetic brain activity associated with anticipatory postural adjustments for bimanual load lifting. Neuroimage, 66, 343-352.
  • Awasthi, B., Sowman, P.F., Friedman, J., & Williams, M.A. (2013). Distinct spatial scale sensitivities for early categorisation of faces and places: Neuromagnetic and behavioural findings. Frontiers in Human Neuroscience, 7(91. doi:10.3389/fnhum.2013.00091
  • Ng, T., Sowman, P., Brock, J., & Johnson, B.W. (2013). Neuromagnetic imaging reveals timing of volitional and anticipatory motor control in bimanual load lifting. Behavioural Brain Research, 247, 182–192.
  • Etchell, A., Sowman, P.F., & Johnson, B.W. (2012). "Shut up!" An electrophysiological study investigating the neural correlates of vocal inhibition. Neuropsychologia, 50(1), 129-138. doi:10.1016/j.neuropsychologia.2011.11.009
  • Sowman, P.F., Crain, S., Harrison, E., & Johnson, B.W. (2012). Reduced activity of left orbitofrontal cortex precedes blocked vocalization: A magnetoencephalographic study. Journal of Fluency Disorders, 37, 359-365.
  • Ng, T.H.B, Sowman, P.F., Brock, J., & Johnson, B.W. (2011). Premovement brain activity in a bimanual load-lifting task. Experimental Brain Research, 208(2), 189-201. doi:10.1007/s00221-010-2470-5
  • Naser-ud-Din, S., Sowman, P., Sampson, W., Dreyer, C., & Türker, K. (2011). Masseter length determines muscle spindle reflex excitability during jaw-closing movements American Journal of Orthodontics and Dentofacial Orthopedics, 139(4), 303-315.
  • Sowman, P.F., Brinkworth, R.S.A., & Türker, K.S. (2010). Threshold for detection of incisal forces is increased by jaw movement. Journal of Dental Research, 89(4), 395-399. doi:10.1177/0022034510363101
  • Naser-Ud-Din, S., Sowman, P.F., Dang, H., & Türker, K.S. (2010). Modulation of masseteric reflexes by simulated mastication. Journal of Dental Research, 89(1), 61-65. doi:10.1177/0022034509352842
  • Sowman, P. F., Wang, K., Svensson, P., & Arendt-Nielsen, L. (2010). Diffuse noxious inhibitory control evoked by tonic craniofacial pain in humans. European Journal of Pain, 15, 139-145. doi: 10.1016/j.ejpain.2010.06.009
  • Lobbezoo, F., Sowman, P.F., & Türker, K.S. (2009). Modulation of human exteroceptive jaw reflexes during simulated mastication. Clinical Neurophysiology, 120(2), 398-406.
  • Sowman, P. F., Flavel, S. C., McShane, C. L., Sakuma, S., Miles, T. S., & Nordstrom, M. A. (2009). Asymmetric activation of motor cortex controlling human anterior digastric muscles during speech and target-directed jaw movements. Journal of Neurophysiology, 102(1), 159-166. doi:10.1152/jn.90894.2008
  • Sowman, P.F., & Türker, K.S. (2008). The frequency response of periodontal mechanoreceptors and its amplitude modulation by tooth preload Journal of Dental Research, 87(2), 175-9.
  • Sowman, P.F., Flavel, S., McShane, C.L., Miles, T.S. & Nordstorm, M.A. (2008). Transcranial magnetic stimulation reduces masseter masseter motoneuron pool excitability throughout the central silent period. Clinical Neurophysiology, 119(5), 1119-29.
  • Sowman, P.F., Brinkworth, R.S.A, & Türker, K.S. (2007). Mandibular physiological tremor is reduced by increasing-force ramp contractions and periodontal anaesthesia. Experimental Brain Research, 184(1), 71-82.
  • Sowman, P.F., & Türker, K.S. (2007). Mandibular physiological tremor during isometric contractions. Archives of Oral Biology, 52(4), 353-6.
  • Sowman, P.F., Ogston, K., & Türker, K.S. (2007). Periodontal anaesthetisation decreases rhythmic synchrony between masseteric motor units at the frequency of jaw tremor. Experimental Brain Research, 179(4), 673-82.
  • Türker, K.S., Sowman, P.F., Tuncer, M., Tucker, K.J., & Brinkworth, R.S.A. (2007). The role of periodontal mechanoreceptors in mastication. Archives of Oral Biology, 52(4), 361-4.
  • Sowman, P.F., Thomspon, P.D., & Miles, T.S. (2007). Investigation of an unusual, high-frequency jaw tremor with coherence analysis. Movement Disorders, 15(23), 441-443.
  • Sowman, P.F., Brinkworth, R.S.A, & Türker, K.S. (2006). Periodontal anaesthesia reduces common 8 Hz input to masseters during isometric biting. Experimental Brain Research, 169, 326-37.
  • Türker, K.S., Johnsen, S.E., Sowman, P.F., & Trulsson,M. (2006). A study on synaptic coupling between single orofacial mechanoreceptors and human masseter muscle. Experimental Brain Research, 170, 488-500.
  • Türker, K.S., Schmied, A., Rossi, A., Mazzocchio, R., Sowman, P.F., & Vedel, J-P. (2006). Is the human masticatory system devoid of recurrent inhibition? Experimental Brain Research, 179(1), 131-144.
  • Sowman, P.F., & Türker, K.S. (2005). Methods of time and frequency domain examination of physiological tremor in the human jaw. Human Movement Science, 24, 657-66.

Published Abstracts

  • Chiou, R., Sowman, P.F., Etchell, A.C., & Rich, A.N. (2013). How does the brain integrate banana with yellowness: The neural architecture of object colour knowledge requires left anterior temporal lobe [Abstract]. Journal of Vision, 13(9), 1008. doi:10.1167/13.9.1008
  • Awasthi, B., Sowman, P.F., Friedman, J., & Williams, M.A. (2012). Behavioural and MEG studies of perception of low spatial frequency faces [Abstract]. Clinical EEG and Neuroscience, 43(3), 215-250. doi:10.1177/1550059412444821
  • Chiou, R., Sowman, P., Etchell, A., & Rich, A.N. (2012). Frontiers in Human Neuroscience Conference [Abstract]. ACNS-2012 Australasian Cognitive Neuroscience Conference.
  • Williams, M.A., Awasthi, B., Sowman, P.F., Finkbeiner, M.S., & Rich, A.N. (2012). Atypical neural response to high and low spatial frequency stimuli in a rare case of visual perseveration [Abstract]. Frontiers in Human Neuroscience. doi:10.3389/conf.fnhum.2012.208.00163
  • Chiou, R., Sowman, P., Etchell, A., & Rich, A.N. (2012). Beyond modality-specific brain regions: The neural implementation of object colour knowledge requires anterior temporal lobes [Abstract]. Frontiers in Human Neuroscience Conference Abstract: ACNS-2012 Australasian Cognitive Neuroscience Conference.
  • Sowman, P.F., & Türker, K.S. (2006). Periodontal reflex origins of mandibular physiological tremor [Abstract]. Proceedings of the International Mastication Symposium 2006.
  • Sowman, P.F., Ogston, K, & Türker, K.S. (2006). Periodontal anaesthesia reduces masseter motor unit synchrony [Abstract]. Proceedings of the Australian Neuroscience Society, 17, 75.
  • Türker, K.S., Sowman, P.F., Tuncer, M., Tucker, K.J., & Brinkworth, R.S.A. (2006). A review of the role of periodontal mechanoreceptors in mastication [Abstract]. Proceedings of the International Mastication Symposium 2006.
  • Sowman, P.F., Brinkworth, R.S.A, & Türker, K.S. (2005). Mandibular physiological tremor during isometric ramp contractions [Abstract]. Proceedings of the Australian Neuroscience Society, 16, 177.
  • Sowman, P.F., Brinkworth, R.S.A, & Türker, K.S. (2005). Periodontal mechanoreceptors and jaw tremor [Abstract]. Proceedings of the Seventh Motor Control and Human Skills Conference.
  • Sowman, P.F., Ogston, K, & Türker, K.S. (2005). Periodontal anaesthesia reduces masseter motor unit coherence [Abstract]. Proceedings of the Motor Control and Cognitive Neuroscience Conference 2005.
  • Sowman, P.F., & Türker, K.S. (2004). Periodontal mechanoreceptors and automatic bite-force regulation [Abstract]. Proceedings of the Australian Neuroscience Society, 15.
  • Sowman, P.F., Brinkworth, R.S.A, & Türker, K.S. (2004). Periodontal mechanoreceptors and jaw tremor [Abstract]. Society for Neuroscience Abstracts, 992, 17.

Published Conference Proceedings

  • Ng, T., Sowman, P., Brock, J., & Johnson, B.W. (2010). An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task. In W. Christensen, E. Schier, and J. Sutton (Eds.), In ASCS09: Proceedings of the 9th Conference of the Australasian Society for Cognitive Science (pp. 261-269). Sydney: Macquarie Centre for Cognitive Science.

Conference Presentations, Colloquia, and other presentations

  • Sowman, P., Crain, S., Harrison, E., & Johnson, B.W. (2014, November). Lateralization of brain activation in stuttering and non-stuttering preschool children: An MEG study of picture-naming. Poster session presented at the American Speech-Language-Hearing Association (ASHA) Annual Convention, Florida, USA.
  • Castro-Meneses, L., Johnson, B.W., & Sowman, P. (2014, June). Prefrontal AtDCS enhances vocal and manual reactive inhibition. Poster session presented at the Annual Meeting of the Organization for Human Brain Mapping, Hamburg, Germany.
  • Sowman, P. (2013, November). Induction of plasticity in the human motor cortex by pairing an auditory stimulus with TMS. Poster session presented at the 4th Australasian Cognitive Neuroscience Conference (ACNC), Melbourne.
  • Thompson, W.F., Sowman, P., Nickels, L., Al-Janabi, S., Merrett, D., & Savage, G. (2013, August). Melodic intonation therapy: Is it an effective treatment for non-fluent aphasia? Paper presented at the Biannual meeting of the Society for Music Perception and Cognition (SMPC), Toronto, Canada.
  • Brock, J., Caruana, N., & Sowman, P. (2012, December). Picture naming and the language bottleneck in autism. Paper presented at the Inaugural Scientific Conference of the Australasian Society for Autism Research (ASfAR), Sydney.
  • Castro-Meneses, L.J., Sowman, P., & Johnson, B.W. (2012, December). Statistical segmentation of streams of syllables: A pilot EEG study. Poster session presented at the Australasian Cognitive Neuroscience Conference (ACNS), Brisbane.
  • Chiou, R., Sowman, P., Etchell, A., & Rich, A.N. (2012, December). Beyond modality-specific brain regions: The neural implementation of object colour knowledge requires anterior temporal lobes. Poster session presented at the Australasian Cognitive Neuroscience Conference (ACNS), Brisbane.
  • Williams, M., Awasthi, B., Sowman, P., Finkbeiner, M., & Rich, A. (2012, December). Atypical neural response to high and low spatial frequency stimuli in a rare case of visual perseveration. Paper presented at the Australasian Cognitive Neuroscience Conference (ACNS), Brisbane.
  • Castro-Meneses, L., Johnson, B.W., & Sowman, P. (2012, August). Segmentation of streams of syllables based on non-adjacent transitional probabilities: A pilot MEG study. Poster session presented at the ARC Centre of Excellence in Cognition and its Disorders (CCD) Annual Workshop, Macquarie University, Macquarie University, Sydney.
  • Burianova, H., Savage, G., Sowman, P., Williams, M., Rich, A., Marstaller, L., & Johnson, B.W. (2012, April). Functional role of primary motor cortex in motor imagery measured with fMRI and MEG. Poster session presented at the 19th Annual Cognitive Neuroscience Meeting, Chicago, USA.
  • Awasthi, B., Sowman, P.F., Friedman, J., & Williams, M.A. (2011, December). Behavioural and MEG studies of perception of low spatial frequency faces. Poster session presented at the Australasian Cognitive Neurosciences Conference (ACNC), Sydney.
  • Ng, T., Sowman, P., Brock, J., & Johnson, B. (2011, December). Temporal dynamics of motor coordination in a bimanual load lifting task. Paper presented at the Australasian Cognitive Neuroscience Conference, Sydney.
  • Ng, T., Sowman, P., Brock, J., & Johnson, B. (2011, January). Premovement brain activity in a bimanual load lifting task. Paper presented at the 17th Annual Meeting of the Organization for Human Brain Mapping, Quebec.
  • Etchell, A., Sowman, P., & Johnson, B.W. (2010, November). "Shut up." An electrophysiological study investigating the neural correlates of vocal inhibition. Poster session presented at the Australian Cognitive Neuroscience Conference, Melbourne, Australia.
  • Ng, T., Sowman, P., Brock, J. & Johnson, B.W. (2010, September). An EEG/MEG study of anticipatory postural adjustment in a bimanual load-lifting task. Poster session presented at the 9th Conference of the Australasian Society for Cognitive Science, Sydney, Australia.
  • Sowman, P., Johnson, B.W., Reid, M., Harrison, W., & Crain, S. (2010, April). Brain dynamics of picture naming in preschoolers: An MEG study. Poster session presented at the EPC10 Australian Experimental Psychology Conference, Melbourne.
  • Brock, J., Johnson, B.W., Sowman, P., Calacouris, S., & Heck, P. (2010, April). A magnetoencephalography study of oscillatory brain responses to spoken words. Paper presented at the EPC10 Australian Experimental Psychology Conference, Melbourne, Australia.
  • Isikoglu, S., Sendemir-Urkmez, A., Sowman, P.F., Abolfathi, P. & Turker, K.S. (2008, April). Human masticatory reflex modulation. Paper presented at the VII National Neuroscience Congress, Adana, Turkey.
  • Cakir, O., Sowman, P.F., Yuvuz, U., Binboga, E. & Turker, K.S. (2008, April). Using frequency analysis of surface EMG to investigate common inputs to motoneurons. Paper presented at the VII National Neuroscience Congress, Adana, Turkey.
  • Yavuz, S.U., Sendemir-Urkmez, A., Sowman, P.F., & Turker, K.S. (2008, April). Electromechanical delays in ankle plantar flexion following H-reflexes in the triceps surae. Paper presented at the VII National Neuroscience Congress, Adana, Turkey.
  • Sowman, P.F. (2007, September). Investigating Motor Control in the Human Jaw Vision and Motor Control Research Paper presented at the Navigating Within the Environment, Adelaide, Australia.
  • Turker, K.S., Naser-Ud-Din, S., Dang, H., & Sowman, P. (2007, September). Control of human mastication by modulation of synaptic drive . Paper presented at the 42nd annual meeting of IADR-Continental European and Israeli Divisions, Thessaloniki, Greece.
  • McShane, C.L., Sowman, P.F., Flavel, S., Miles, T.S. & Nordstorm, M.A. (2007, July). Lateralized motor cortical control of anterior digastric muscles during speech and rapid jaw movements. Paper presented at the IBRO International World Congress of Neuroscience Satellite Meeting, Darwin, Australia.

Further Information

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Contact Details

Telephone: (02) 9850 9599
Fax : (02) 9850 6059
Email : cogsci@mq.edu.au
Web : www.cogsci.mq.edu.au