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Siddharth Ramanan

PhD Student

Contact Details

email : siddharth.ramanan@sydney.edu.au
ORCID : http://orcid.org/0000-0002-8591-042X

External Address

Brain and Mind Centre
The University of Sydney

Profile

I graduated with a Masters in Cognitive Neuropsychology from the University of Edinburgh (UK) where I focused on visual short-term memory in healthy adults with implications to understanding visual short-term memory in ageing and neurodegenerative dementias. My research interests are centered on merging methods from cognitive neuropsychology and clinical neuroscience to explore biological, neuroimaging, and cognitive markers that help improve diagnosis, early detection, and disease tracking of neurodegenerative dementias. My PhD research focuses on developing non-verbal and non-semantic measures for accurate detection and delineation of neurodegenerative dementias, thereby circumventing language difficulties that are inherent to certain dementias. Overall, my research outcomes have a direct and immediate impact on better diagnosis of neurodegenerative dementias and therefore, better prognosis and management of the disease.

Thesis Details

Developing novel tests of non-verbal memory in neurodegenerative disorders.

  • Workload : full time
  • Supervisors : Professor Olivier Piguet and Dr Muireann Irish

Awards

  • CCD Excellence in Research Student Award: Outstanding 2017 Publication (2018), Ramanan, S. for "Ramanan, S., Piguet, O., & Irish, M. (In Press). Rethinking the role of the angular gyrus in remembering the past and imagining the future: The contextual integration model." The Neuroscientist.
  • CCD Annual Workshop Highly Commended PhD Poster Award (2017), Ramanan, S.

Selected Publications

Periodicals

  • Hayes, B.K., Ramanan, S., & Irish, M. (In Press). Truth be told: Semantic memory as the scaffold for veridical communication. Behavioral and Brain Sciences.
  • Irish, M., Landin-Romero, R., Mothakunnel, A., Ramanan, S., Hsieh, S., Hodges, J.R., & Piguet, O. (In Press). Evolution of autobiographical memory impairments in Alzheimer's disease and frontotemporal dementia: A longitudinal neuroimaging study. Neuropsychologia. doi:10.1016/j.neuropsychologia.2017.03.014
  • Ramanan, S. (2017). Distinct neural networks support autobiographical and episodic remembering. [Journal Club] The Journal of Neuroscience, 37(23), 5591-5593.
  • Ramanan, S., de Souza, L.C., Moreau, N., Sarazin, M., Teixeira, A.L., Allen, Z., Guimaraes, H.C., Caramelli, P., Dubois, B., & Hornberger, M. (2017). Determinants of theory of mind performance in Alzheimer's disease: A data-mining study. Cortex, 88, 8-18. doi:10.1016/j.cortex.2016.11.014
  • Ramanan, S., Piguet, O., & Irish, M. (In Press). Rethinking the role of the angular gyrus in remembering the past and imagining the future: The contextual integration model. The Neuroscientist. doi:10.1177/1073858417735514
  • Bertoux, M., Ramanan, S., Slachevsky, A., Wong, S., Henriquez, F., Musa, G., Delgado, C., Flanagan, E., Bottlaender, M., Sarazin, M., Hornberger, M., & Dubois, B. (2016). So close yet so far: Executive contribution to memory processing in behavioral variant frontotemporal dementia. Journal of Alzheimer's Disease, 54(3), 1005-1014. doi:10.3233/JAD-160522
  • Ramanan, S., Bertoux, M., Flanagan, E., Irish, M., Piguet, O., Hodges, J.R., & Hornberger, M. (2016). Longitudinal executive function and episodic memory profiles in behavioral-variant frontotemporal dementia and Alzheimer's disease. Journal of the International Neuropsychological Society, 22, 1-10. doi:10.1017/S1355617716000837
  • Ramanan, S., Flanagan, E., Leyton, C.E., Villemagne, V.L., Rose, C.C., Hodges, J.R., & Hornberger, M. (2016). Non-verbal episodic memory deficits in primary progressive aphasias are highly predictive of underlying amyloid pathology. Journal of Alzheimer's Disease, 51(2), 367-376. doi:10.3233/JAD-150752
  • Ramanan, S., Narayanan, J., D'Souza, T.P., Malik, K.S., & Ratnavalli, E. (2015). Total output and switching in category fluency successfully discriminates Alzheimer's disease from mild cognitive impairment, but not from frontotemporal dementia. Dementia & Neuropsychologia, 9(3), 251-257. doi:10.1590/1980-57642015DN93000007
  • Ramanan, S., & Kumar, D. (2013). Prospective memory in Parkinson's disease: A meta-analysis. Journal of the International Neuropsychological Society, 19(10), 1109-1118. doi:10.1017/S1355617713001045

Published Abstracts

  • Bertoux, M., Ramanan, S., Slachevsky, A., Delgado, C., Henriquez, F., Musa, G., Lamari, F., Bottlaender, M., Sarazin, M., Hornberger, M., & Dubois, B. (2016). So close yet so far: Executive contribution to memory processing in behavioural variant frontotemporal dementia [Abstract]. Journal of Neurochemistry, 138(Suppl. 1), P76. doi:10.1111/jnc.13692
  • Ramanan, S., de Souza, L.C., Sarazin, M., Teixeira, A.L., Caramelli, P., Dubois, B., Hornberger, M., & Bertoux, M. (2016). Determinants of theory of mind performance in Alzheimer’s disease [Abstract]. Journal of Neurochemistry, 138(Suppl. 1), P65. doi:10.1111/jnc.13692
  • Ellajosyula, R., Narayanan, J., Ramanan, S., Chandrashekar, S., & Sabnis, P. (2015). Bilingualism does not delay the age at onset of dementia: A study from memory clinic in South India [Abstract]. Neurology, 85(14), P6.206.

Conference Presentations, Colloquia, and other presentations

  • Ramanan, S. (2018, March). Convergent grey and white matter evidence for lateral parietal contributions to episodic memory retrieval in dementias. Paper presented at the Memory Program Meeting, Manly.
  • Ramanan, S., Mothakunnel, A., Hodges, J.R., Piguet, O., & Irish, M. (2017, November). Exploring the mnemonic contribution of lateral parietal regions to episodic retrieval: evidence from logopenic progressive aphasia. Poster session presented at the CCD Annual Workshop, Mercure Resort Hunter Valley Gardens.
  • Ramanan, S., Strikwerda-Brown, C., Hodges, J. R., Piguet, O., & Irish, M. (2017, October). Distinct profiles of episodic memory impairment across atypical variants of Alzheimer’s disease: A cognitive and neuroimaging study. Poster session presented at the Brain and Mind Centre Symposium, The University of Sydney .
  • Ramanan, S. (2017, September). Unique memory profiles in language and motor presentations of Alzheimer’s disease. Invited colloquium at the Neurodegeneration Network, Norwich Medical School, University of East Anglia, UK.
  • Ramanan, S., Mothakunne, A., Hodges, J., Piguet, O., & Irish, I. (2017, September). In search of parietal contributions to episodic memory – evidence from logopenic progressive aphasia. Paper presented at the 6th Scientific meeting of the Federation of European Societies for Neuropsychology, Maastricht, The Netherlands.
  • Irish, M., Ramanan, S., & Wong, S. (2017, August). Science in schools. Presentation given at the National Science Week, Newtown Public School.
  • Ramanan, S. (2017, August). Posterior parietal nodes and their contributions to episodic memory retrieval in atypical variants of Alzheimer’s disease. Invited colloquium at the Neuroscience and Aphasia Research Unit, University of Manchester, UK.
  • Ramanan, S. (2016, November). In search of parietal contributions to episodic memory - evidence from the dementias. Paper presented at the CCD Memory Workshop: 'What is new in memory research?', The University of Sydney, Sydney.
  • Bertoux, M., Ramanan, S., Slachevsky, A., Wong, S., Henriquez, F., Musa, G., Delgado, C., Flanagan,E., Bottlaender, M., Sarazin, M., Hornberger, M., & Dubois, B. (2016, August). So close yet so far: Executive contribution to memory processing in behavioural variant frontotemporal dementia. Poster session presented at the 10th International Conference on Frontotemporal Dementias, Munich, Germany.
  • Irish, M., Wong, S. & Ramanan, S. (2016, August). 'Science in Schools' visit to Newtown Public School Presentation given at the National Science Week, Sydney.
  • Ramanan, S., de Souza, L.C., Moreau, N., Sarazin, M., Teixeira, A.L., Allen, Z., Guimaraes, H.C., Caramelli, P.C., Dubois, B., Hornberger, M., & Bertoux, M. (2016, August). Determinants of theory of mind performance in Alzheimer's disease. Poster session presented at the 10th International Conference on Frontotemporal Dementias, Munich, Germany.
  • Ramanan, S. (2016, April). Posterior cortical atrophy: A case series. Paper presented at the Forum for Indian Neurology Education, Weekend Cognitive Neurology Course, Hyderabad, India.
  • Ramanan, S. (2016, April). A longitudinal case study of neurosyphilis presenting as frontotemporal dementia. Paper presented at the Forum for Indian Neurology Education, Weekend Cognitive Neurology Course, Hyderabad, India.
  • Ramanan, S., Flanagan, E., Leyton, C.E., Villemagne, V.L., Rowe, C.C., Hodges, J.R., & Hornberger, M. (2015, September). Non-verbal episodic memory deficits in primary progressive aphasias are predictive of underlying amyloid pathology. Poster session presented at the 5th Conference of the European Societies of Neuropsychology, Tampere, Finland.
  • Narayanan, J., Ramanan, S., Sabnis, P., D'Souza, T.P., & Ratnavalli, E. (2014, November). Verbal fluency in multilinguals: Comparison between English and Indian languages in mild cognitive impairment and Alzheimer's disease. Poster session presented at the Biennial Meeting of the World Federation of Neurology Research Group on Aphasia, Dementia and Cognitive Disorders, Hong Kong.
  • Sabnis, P., Narayanan, J., Ramanan, S., D'Souza, T.P., & Ratnavalli, E. (2014, November). Numerical abilities in mild cognitive impairment and dementia. Poster session presented at the Biennial Meeting of the World Federation of Neurology Research Group on Aphasia, Dementia and Cognitive Disorders, Hong Kong.
  • Ramanan, S. (2014, July). Cognitive rehabilitation in amnestic and dysexecutive dementia syndromes. Invited colloquium at the Department of Psychology, Christ University, Bangalore, India.
  • Ramanan, S. (2014, April). How dementia affects executive functions. Invited colloquium at the BRAIN Group, Annasawmy Mudaliar General Hospital, Bangalore, India.
  • Ramanan, S. (2014, April). Posterior cortical atrophy as an atypical presentation of Alzheimer’s disease. Invited colloquium at the BRAIN Group, Annasawmy Mudaliar General Hospital, Bangalore, India.
  • Ramanan, S. (2014, February). Neurosyphilis presenting as frontotemporal dementia – a case study. Invited colloquium at the BRAIN Group, Annasawmy Mudaliar General Hospital, Bangalore, India.

Further Information

Contact Details

Telephone: +61 2 9850 4127
Email : ccd@mq.edu.au
Web : www.ccd.edu.au

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