Dr Sanghamitra Laskar, Dr Shishir Kumar Chandan, Neera Chaudhry


Objective: The purpose of the study was to assess the relation between the age of onset of cognitive impairment and multilingualism in patients assessed in a specialist clinic in north India

Methods: Case records of 76 consecutive patients diagnosed in a speciality clinic were reviewed. The age of onset of cognitive impairment was compared between monolinguals and bilinguals.

Results: In our study, in Bilinguals age of onset of cognitive impairment was delayed by around eight years. Along with bilingualism, years of education was also seen to influence the age of onset of cognitive impairment.

Conclusion: This is a first study done in north India comparing bilingualism and age of onset of cognition of patients in a speciality clinic. The study shows the beneficial effect of bilingualism on age of onset of cognitive impairment by delaying the onset by around 8 year


Bilingualism, Cognitive impairment, Dementia, Alzheimer’s Dementia, Mild Cognitive Impairment

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Alladi S, Bak TH, Duggirala V, Surampudi B, Shailaja M, Shukla AK, Chaudhuri JR, Kaul S. Bilingualism delays age at onset of dementia, independent ofeducation and immigration status. Neurology. 2013 Nov 26;81(22):1938-44

Bialystok E, Craik FI, Freedman M. Bilingualism as a protection against the onset of symptoms of dementia. Neuropsychologia. 2007 Jan 28;45(2):459-64

Chertkow H, Whitehead V, Phillips N, Wolfson C, Atherton J, Bergman H. Multilingualism (but not always bilingualism) delays the onset of Alzheimer disease: evidence from a bilingual community. Alzheimer Dis Assoc Disord. 2010 Apr-Jun;24(2):118-25.

Richards M, Deary IJ. A life course approach to cognitive reserve: a model for cognitive aging and development? Ann Neurol. 2005 Oct;58(4):617-22.

Costa A, Hernández M, Costa-Faidella J, Sebastián-Gallés N. On the bilingual advantage in conflict processing: now you see it, now you don't. Cognition. 2009 Nov;113(2):135-49.

Garbin G, Sanjuan A, Forn C, Bustamante JC, Rodriguez-Pujadas A, Belloch V,Hernandez M, Costa A, Avila C. Bridging language and attention: brain basis of the impact of bilingualism on cognitive control. Neuroimage. 2010 Dec;53(4):1272-8.

Freedman M, Alladi S, Chertkow H, Bialystok E, Craik FI, Phillips NA,

Duggirala V, Raju SB, Bak TH. Delaying onset of dementia: are two languages enough? Behav Neurol. 2014; 2014

Vasanta, D & Alladi, Suvarna & Sireesha, J. & Bapi, Raju. (2010). Language choice and language use patterns among Telugu-Hindi/Urdu-English speakers in Hyderabad, India. International Conference on Language, Society, and Culture in Asian Contexts (LSCAC) Proceedings. 57-67

Annamalai E. The language factor in code mixing. International Journal of the Sociology of Language, Volume 1989, Issue 75, Pages 47–54

Annamalai E. Managing Multilingualism in India: Political and linguistic Manifestations. New Delhi: Sage Publications;2001.

Vasanta D. (Re)searching multilingualism in India: a criticalreview of concepts. JISHA 2011;25:71–81.

Alladi S, Mekala S, Chadalawada SK, Jala S, Mridula R, Kaul S. Subtypes of dementia: a study from a memory clinic in India. Dement Geriatr Cogn Disord. 2011;32(1):32-8

Mohanty AK. Bilingualism in Multilingual Society: Psychosocial and Pedagogical Implications. Mysore, India: Central Institute of Indian Languages; 1994.

Green DW. Language control in different contexts: the behavioral ecology of bilingual speakers. Front Psychol. 2011 May 19;2:103

Bialystok E, Craik FI, Luk G. Bilingualism: consequences for mind and brain. Trends Cogn Sci.2012;16(4):240-250.

Abutalebi J, Della Rosa PA, Green DW, Hernandez M, Scifo P, Keim R, Cappa SF, Costa A. Bilingualism tunes the anterior cingulate cortex for conflict monitoring. Cereb Cortex. 2012 Sep;22(9):2076-8.

Shaji S, Promodu K, Abraham T, Roy KJ, Verghese A. Anepidemiological study of dementia in a rural community inKerala, India. Br J Psychiatry 1996;168:745–749.

Vas CJ, Pinto C, Panikker D, et al. Prevalence of dementiain an urban Indian population. Int Psychogeriatr 2001;13:439–450


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