Abstract
This review aims to define awareness impairment and related disturbances in neurodegenerative diseases, including Alzheimer’s disease (AD) and frontotemporal lobar degeneration (FTLD) spectrum of disorders. An update of the available scientific literature on the use of magnetic resonance imaging (MRI) in the study of awareness in these disorders is also offered. MRI plays an important role in the characterization of neurodegenerative signatures and can increase our knowledge on brain structural and functional correlates of awareness. In the reviewing process, we established a-priori criteria and we searched the scientific literature for relevant articles on this topic. In summary, we selected 36 articles out of 1340 publications retrieved from PubMed. Based on this selection, this review discusses the multiple terms used to define different or overlap** aspects of awareness impairment, and specifically summarizes recent application of MRI for investigating anosognosia, social cognition, including theory of mind and emotional processing, free will, and autonoetic awareness alterations in different neurodegenerative disorders, with most of these studies focused on AD and FTLD. This systematic review highlights the importance of awareness impairment and related domains in neurodegenerative disorders, especially in AD and FTLD, and it outlines MRI structural and functional correlates in these populations.
Similar content being viewed by others
Data availability
This study is a review of already published data.
References
Stuss DT, Anderson V (2004) The frontal lobes and theory of mind: developmental concepts from adult focal lesion research. Brain Cogn 55:69–83
Kotchoubey B (2018) Human consciousness: where is it from and what is it for. Front Psychol 9:567
Flashman LA (2002) Disorders of awareness in neuropsychiatric syndromes: an update. Curr Psychiatry Rep 4:346–353
Shany-Ur T, Lin N, Rosen HJ, Sollberger M, Miller BL, Rankin KP (2014) Self-awareness in neurodegenerative disease relies on neural structures mediating reward-driven attention. Brain 137:2368–2381
Sunderaraman P, Cosentino S (2017) Integrating the constructs of anosognosia and metacognition: a review of recent findings in dementia. Curr Neurol Neurosci Rep 17:27
Chavoix C, Insausti R (2017) Self-awareness and the medial temporal lobe in neurodegenerative diseases. Neurosci Biobehav Rev 78:1–12
Northoff G, Heinzel A, de Greck M, Bermpohl F, Dobrowolny H, Panksepp J (2006) Self-referential processing in our brain–a meta-analysis of imaging studies on the self. Neuroimage 31:440–457
Ouzzani M, Hammady H, Fedorowicz Z, Elmagarmid A (2016) Rayyan-a web and mobile app for systematic reviews. Syst Rev 5:210
Ansell EL, Bucks RS (2006) Mnemonic anosognosia in Alzheimer’s disease: a test of Agnew and Morris (1998). Neuropsychologia 44:1095–1102
Tabert MH, Albert SM, Borukhova-Milov L, Camacho Y, Pelton G, Liu X, Stern Y, Devanand DP (2002) Functional deficits in patients with mild cognitive impairment: prediction of AD. Neurology 58:758–764
Montembeault M, Stijelja S, Brambati SM, Alzheimer’s Disease Neuroimaging I (2022) Self-reported word-finding complaints are associated with cerebrospinal fluid amyloid beta and atrophy in cognitively normal older adults. Alzheimers Dement (Amst) 14:e12274
Cacciamani F, Godefroy V, Brambati SM, Migliaccio R, Epelbaum S, Montembeault M (2022) Differential patterns of domain-specific cognitive complaints and awareness across the Alzheimer’s disease spectrum. Front Aging Neurosci 14:811739
Vannini P, Amariglio R, Hanseeuw B, Johnson KA, McLaren DG, Chhatwal J, Pascual-Leone A, Rentz D, Sperling RA (2017) Memory self-awareness in the preclinical and prodromal stages of Alzheimer’s disease. Neuropsychologia 99:343–349
Cacciamani F, Houot M, Gagliardi G, Dubois B, Sikkes S, Sanchez-Benavides G, Denicolo E, Molinuevo JL, Vannini P, Epelbaum S (2021) Awareness of cognitive decline in patients with Alzheimer’s disease: a systematic review and meta-analysis. Front Aging Neurosci 13:697234
Ford AH, Almeida OP, Flicker L, Garrido GJ, Greenop KR, Foster JK, Etherton-Beer C, van Bockxmeer FM, Lautenschlager NT (2014) Grey matter changes associated with deficit awareness in mild cognitive impairment: a voxel-based morphometry study. J Alzheimers Dis 42:1251–1259
Spalletta G, Piras F, Piras F, Sancesario G, Iorio M, Fratangeli C, Cacciari C, Caltagirone C, Orfei MD (2014) Neuroanatomical correlates of awareness of illness in patients with amnestic mild cognitive impairment who will or will not convert to Alzheimer’s disease. Cortex 61:183–195
Senturk G, Bilgic B, Arslan AB, Bayram A, Hanagasi H, Gurvit H, Emre M (2017) Cognitive and anatomical correlates of anosognosia in amnestic mild cognitive impairment and early-stage Alzheimer’s disease. Int Psychogeriatr 29:293–302
Guerrier L, Le Men J, Gane A, Planton M, Salabert AS, Payoux P, Dumas H, Bonneville F, Peran P, Pariente J (2018) Involvement of the cingulate cortex in anosognosia: a multimodal neuroimaging study in Alzheimer’s disease patients. J Alzheimers Dis 65:443–453
Steward KA, Kennedy R, Erus G, Nasrallah IM, Wadley VG (2019) Poor awareness of IADL deficits is associated with reduced regional brain volume in older adults with cognitive impairment. Neuropsychologia 129:372–378
Ries ML, Jabbar BM, Schmitz TW, Trivedi MA, Gleason CE, Carlsson CM, Rowley HA, Asthana S, Johnson SC (2007) Anosognosia in mild cognitive impairment: relationship to activation of cortical midline structures involved in self-appraisal. J Int Neuropsychol Soc 13:450–461
Ries ML, McLaren DG, Bendlin BB, Guofanxu RHA, Birn R, Kastman EK, Sager MA, Asthana S, Johnson SC (2012) Medial prefrontal functional connectivity–relation to memory self-appraisal accuracy in older adults with and without memory disorders. Neuropsychologia 50:603–611
Zamboni G, Drazich E, McCulloch E, Filippini N, Mackay CE, Jenkinson M, Tracey I, Wilcock GK (2013) Neuroanatomy of impaired self-awareness in Alzheimer’s disease and mild cognitive impairment. Cortex 49:668–678
Amanzio M, Torta DM, Sacco K, Cauda F, D’Agata F, Duca S, Leotta D, Palermo S, Geminiani GC (2011) Unawareness of deficits in Alzheimer’s disease: role of the cingulate cortex. Brain 134:1061–1076
Amanzio M, D’Agata F, Palermo S, Rubino E, Zucca M, Galati A, Pinessi L, Castellano G, Rainero I (2016) Neural correlates of reduced awareness in instrumental activities of daily living in frontotemporal dementia. Exp Gerontol 83:158–164
McGlynn SM, Schacter DL (1989) Unawareness of deficits in neuropsychological syndromes. J Clin Exp Neuropsychol 11:143–205
Sanchez-Benavides G, Grau-Rivera O, Cacciaglia R, Suarez-Calvet M, Falcon C, Minguillon C, Gramunt N, Sala-Vila A, Gispert JD, Molinuevo JL (2018) Distinct cognitive and brain morphological features in healthy subjects unaware of informant-reported cognitive decline. J Alzheimers Dis 65:181–191
Vannini P, Hanseeuw B, Munro CE, Amariglio RE, Marshall GA, Rentz DM, Pascual-Leone A, Johnson KA, Sperling RA (2017) Anosognosia for memory deficits in mild cognitive impairment: insight into the neural mechanism using functional and molecular imaging. Neuroimage Clin 15:408–414
Cosentino S, Brickman AM, Griffith E, Habeck C, Cines S, Farrell M, Shaked D, Huey ED, Briner T, Stern Y (2015) The right insula contributes to memory awareness in cognitively diverse older adults. Neuropsychologia 75:163–169
Perrotin A, Desgranges B, Landeau B, Mezenge F, La Joie R, Egret S, Pelerin A, de la Sayette V, Eustache F, Chetelat G (2015) Anosognosia in Alzheimer disease: disconnection between memory and self-related brain networks. Ann Neurol 78:477–486
Antoine N, Bahri MA, Bastin C, Collette F, Phillips C, Balteau E, Genon S, Salmon E (2019) Anosognosia and default mode subnetwork dysfunction in Alzheimer’s disease. Hum Brain Mapp 40:5330–5340
Crutch SJ, Schott JM, Rabinovici GD, Murray M, Snowden JS, van der Flier WM, Dickerson BC, Vandenberghe R, Ahmed S, Bak TH, Boeve BF, Butler C, Cappa SF, Ceccaldi M, de Souza LC, Dubois B, Felician O, Galasko D, Graff-Radford J, Graff-Radford NR, Hof PR, Krolak-Salmon P, Lehmann M, Magnin E, Mendez MF, Nestor PJ, Onyike CU, Pelak VS, Pijnenburg Y, Primativo S, Rossor MN, Ryan NS, Scheltens P, Shakespeare TJ, Gonzalez AS, Tang-Wai DF, Yong KXX, Carrillo M, Fox NC, AsAI A (2017) Consensus classification of posterior cortical atrophy. Alzheimers Dement 13:870–884
Mendez MF, Ghajarania M, Perryman KM (2002) Posterior cortical atrophy: clinical characteristics and differences compared to Alzheimer’s disease. Dement Geriatr Cogn Disord 14:33–40
Marková IS, Berrios GE (2011) Awareness and insight in psychopathology: An essential distinction? Theory Psychol 21:421–437
Eslinger P, Dennis K, Moore P, Antani S, Hauck R, Grossman M (2005) Metacognitive deficits in frontotemporal dementia. J Neurol Neurosurg Psychiatry 76:1630–1635
Hornberger M, Yew B, Gilardoni S, Mioshi E, Gleichgerrcht E, Manes F, Hodges JR (2014) Ventromedial-frontopolar prefrontal cortex atrophy correlates with insight loss in frontotemporal dementia and Alzheimer’s disease. Hum Brain Mapp 35:616–626
Magno MA, Canu E, Agosta F, Filippi M (2022) Measuring social cognition in frontotemporal lobar degeneration: a clinical approach. J Neurol 269:2227–2244
Belfort T, Simoes P, de Sousa MFB, Santos RL, Barbeito I, Torres B, Dourado MCN (2018) The relationship between social cognition and awareness in Alzheimer disease. J Geriatr Psychiatry Neurol 31:27–33
Giovagnoli AR, Bell B, Erbetta A, Paterlini C, Bugiani O (2019) Analyzing theory of mind impairment in patients with behavioral variant frontotemporal dementia. Neurol Sci 40:1893–1900
Synn A, Mothakunnel A, Kumfor F, Chen Y, Piguet O, Hodges JR, Irish M (2018) Mental states in moving shapes: distinct cortical and subcortical contributions to theory of mind impairments in dementia. J Alzheimers Dis 61:521–535
Seeley WW, Menon V, Schatzberg AF, Keller J, Glover GH, Kenna H, Reiss AL, Greicius MD (2007) Dissociable intrinsic connectivity networks for salience processing and executive control. J Neurosci 27:2349–2356
Toller G, Brown J, Sollberger M, Shdo SM, Bouvet L, Sukhanov P, Seeley WW, Miller BL, Rankin KP (2018) Individual differences in socioemotional sensitivity are an index of salience network function. Cortex 103:211–223
Shinagawa S, Babu A, Sturm V, Shany-Ur T, Toofanian Ross P, Zackey D, Poorzand P, Grossman S, Miller BL, Rankin KP (2015) Neural basis of motivational approach and withdrawal behaviors in neurodegenerative disease. Brain Behav 5:e00350
Kalbe E, Salmon E, Perani D, Holthoff V, Sorbi S, Elsner A, Weisenbach S, Brand M, Lenz O, Kessler J, Luedecke S, Ortelli P, Herholz K (2005) Anosognosia in very mild Alzheimer’s disease but not in mild cognitive impairment. Dement Geriatr Cogn Disord 19:349–356
Sollberger M, Rosen HJ, Shany-Ur T, Ullah J, Stanley CM, Laluz V, Weiner MW, Wilson SM, Miller BL, Rankin KP (2014) Neural substrates of socioemotional self-awareness in neurodegenerative disease. Brain Behav 4:201–214
Jastorff J, De Winter FL, Van den Stock J, Vandenberghe R, Giese MA, Vandenbulcke M (2016) Functional dissociation between anterior temporal lobe and inferior frontal gyrus in the processing of dynamic body expressions: insights from behavioral variant frontotemporal dementia. Hum Brain Mapp 37:4472–4486
Reus LM, Vijverberg EG, Tijms BM, Kate MT, Gossink F, Krudop WA, Campo MD, Teunissen CE, Barkhof F, van der Flier WM, Visser PJ, Dols A, Pijnenburg YA (2018) Disease trajectories in behavioural variant frontotemporal dementia, primary psychiatric and other neurodegenerative disorders presenting with behavioural change. J Psychiatr Res 104:183–191
Hutchings R, Hodges JR, Piguet O, Kumfor F, Boutoleau-Bretonniere C (2015) Why should I care? Dimensions of socio-emotional cognition in younger-onset dementia. J Alzheimers Dis 48:135–147
Moll J, Zahn R, de Oliveira-Souza R, Bramati IE, Krueger F, Tura B, Cavanagh AL, Grafman J (2011) Impairment of prosocial sentiments is associated with frontopolar and septal damage in frontotemporal dementia. Neuroimage 54:1735–1742
Shearn D, Bergman E, Hill K, Abel A, Hinds L (1990) Facial coloration and temperature responses in blushing. Psychophysiology 27:687–693
Sturm VE, Ascher EA, Miller BL, Levenson RW (2008) Diminished self-conscious emotional responding in frontotemporal lobar degeneration patients. Emotion 8:861–869
Sturm VE, Rosen HJ, Allison S, Miller BL, Levenson RW (2006) Self-conscious emotion deficits in frontotemporal lobar degeneration. Brain 129:2508–2516
Sturm VE, Sollberger M, Seeley WW, Rankin KP, Ascher EA, Rosen HJ, Miller BL, Levenson RW (2013) Role of right pregenual anterior cingulate cortex in self-conscious emotional reactivity. Soc Cogn Affect Neurosci 8:468–474
Kuilman L, Jansen GJ, Middel B, Mulder LB, Roodbol PF (2019) Moral reasoning explained by personality traits and moral disengagement: a study among Dutch nurse practitioners and physician assistants. J Adv Nurs 75:1252–1262
Shany-Ur T, Rankin KP (2011) Personality and social cognition in neurodegenerative disease. Curr Opin Neurol 24:550–555
Chiong W, Wilson SM, D’Esposito M, Kayser AS, Grossman SN, Poorzand P, Seeley WW, Miller BL, Rankin KP (2013) The salience network causally influences default mode network activity during moral reasoning. Brain 136:1929–1941
Wong S, Irish M, O’Callaghan C, Kumfor F, Savage G, Hodges JR, Piguet O, Hornberger M (2017) Should I trust you? Learning and memory of social interactions in dementia. Neuropsychologia 104:157–167
Kipps CM, Nestor PJ, Acosta-Cabronero J, Arnold R, Hodges JR (2009) Understanding social dysfunction in the behavioural variant of frontotemporal dementia: the role of emotion and sarcasm processing. Brain 132:592–603
Takizawa C, Thompson PL, van Walsem A, Faure C, Maier WC (2015) Epidemiological and economic burden of Alzheimer’s disease: a systematic literature review of data across Europe and the United States of America. J Alzheimers Dis 43:1271–1284
Evans DA, Funkenstein HH, Albert MS, Scherr PA, Cook NR, Chown MJ, Hebert LE, Hennekens CH, Taylor JO (1989) Prevalence of Alzheimer’s disease in a community population of older persons. Higher than previously reported. JAMA 262:2551–2556
Petersen RC (2004) Mild cognitive impairment as a diagnostic entity. J Intern Med 256:183–194
Mesulam M, Shaw P, Mash D, Weintraub S (2004) Cholinergic nucleus basalis tauopathy emerges early in the aging-MCI-AD continuum. Ann Neurol 55:815–828
Downey LE, Mahoney CJ, Buckley AH, Golden HL, Henley SM, Schmitz N, Schott JM, Simpson IJ, Ourselin S, Fox NC, Crutch SJ, Warren JD (2015) White matter tract signatures of impaired social cognition in frontotemporal lobar degeneration. NeuroImage Clinical 8:640–651
Buckley RF, Saling MM, Irish M, Ames D, Rowe CC, Villemagne VL, Lautenschlager NT, Maruff P, Macaulay SL, Martins RN, Szoeke C, Masters CL, Rainey-Smith SR, Rembach A, Savage G, Ellis KA, Australian Imaging B, Lifestyle Study of Ageing Research G (2014) Autobiographical narratives relate to Alzheimer’s disease biomarkers in older adults. Int Psychogeriatr 26:1737–1746
Bozeat S, Gregory CA, Ralph MA, Hodges JR (2000) Which neuropsychiatric and behavioural features distinguish frontal and temporal variants of frontotemporal dementia from Alzheimer’s disease? J Neurol Neurosurg Psychiatry 69:178–186
Robinson JA, Swanson KL (1990) Autobiographical memory: the next phase. Appl Cogn Psychol 4:321–335
Thomann PA, Seidl U, Brinkmann J, Hirjak D, Traeger T, Wolf RC, Essig M, Schroder J (2012) Hippocampal morphology and autobiographic memory in mild cognitive impairment and Alzheimer’s disease. Curr Alzheimer Res 9:507–515
Drubach DA, Rabinstein AA, Molano J (2011) Free will, freedom of choice and frontotemporal lobar degeneration. Mens Sana Monographs 9:238
Gomes G (2007) Free will, the self, and the brain. Behav Sci Law 25:221–234
Rosen HJ, Gorno-Tempini ML, Goldman W, Perry R, Schuff N, Weiner M, Feiwell R, Kramer J, Miller BL (2002) Patterns of brain atrophy in frontotemporal dementia and semantic dementia. Neurology 58:198–208
Lhermitte F, Pillon B, Serdaru M (1986) Human autonomy and the frontal lobes. Part I: imitation and utilization behavior: a neuropsychological study of 75 patients. Ann Neurol 19:326–334
Lagarde J, Valabregue R, Corvol JC, Le Ber I, Colliot O, Vidailhet M, Levy R (2013) The clinical and anatomical heterogeneity of environmental dependency phenomena. J Neurol 260:2262–2270
Bertrand E, Azar M, Rizvi B, Brickman AM, Huey ED, Habeck C, Landeira-Fernandez J, Mograbi DC, Cosentino S (2018) Cortical thickness and metacognition in cognitively diverse older adults. Neuropsychology 32:700–710
Widerker D (2017) Moral responsibility and alternative possibilities: essays on the importance of alternative possibilities. Routledge
Meynen G (2010) Free will and mental disorder: exploring the relationship. Theor Med Bioeth 31:429–443
Qian W, Fischer CE, Churchill NW, Kumar S, Rajji T, Schweizer TA (2019) Delusions in Alzheimer disease are associated with decreased default mode network functional connectivity. Am J Geriatr Psychiatry 27:1060–1068
Guo SX, Kendrick KM, Yu RJ, Wang HLS, Feng JF (2014) Key functional circuitry altered in schizophrenia involves parietal regions associated with sense of self. Hum Brain Mapp 35:123–139
Zanetti O, Vallotti B, Frisoni GB, Geroldi C, Bianchetti A, Pasqualetti P, Trabucchi M (1999) Insight in dementia: When does it occur? Evidence for a nonlinear relationship between insight and cognitive status. J Gerontol B-Psychol 54:P100–P106
Rascovsky K, Hodges JR, Knopman D, Mendez MF, Kramer JH, Neuhaus J, van Swieten JC, Seelaar H, Dopper EG, Onyike CU, Hillis AE, Josephs KA, Boeve BF, Kertesz A, Seeley WW, Rankin KP, Johnson JK, Gorno-Tempini ML, Rosen H, Prioleau-Latham CE, Lee A, Kipps CM, Lillo P, Piguet O, Rohrer JD, Rossor MN, Warren JD, Fox NC, Galasko D, Salmon DP, Black SE, Mesulam M, Weintraub S, Dickerson BC, Diehl-Schmid J, Pasquier F, Deramecourt V, Lebert F, Pijnenburg Y, Chow TW, Manes F, Grafman J, Cappa SF, Freedman M, Grossman M, Miller BL (2011) Sensitivity of revised diagnostic criteria for the behavioural variant of frontotemporal dementia. Brain 134:2456–2477
Mendez MF, Anderson E, Shapira JS (2005) An investigation of moral judgement in frontotemporal dementia. Cogn Behav Neurol 18:193–197
Mendez MF, Chen AK, Shapira JS, Miller BL (2005) Acquired sociopathy and frontotemporal dementia. Dement Geriatr Cogn Disord 20:99–104
Magno MA, Canu E, Filippi M, Agosta F (2022) Social cognition in the FTLD spectrum: evidence from MRI. J Neurol 269:2245–2258
Schilbach L, Eickhoff SB, Rska-Jagiela AR, Fink GR, Vogeley K (2008) Minds at rest? Social cognition as the default mode of cognizing and its putative relationship to the “default system” of the brain. Conscious Cogn 17:457–467
Bortolotti L, Miyazono K (2016) The ethics of delusional belief. Erkenntnis 81:275–296
Jorm AF, Jacomb PA (1989) The Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE): socio-demographic correlates, reliability, validity and some norms. Psychol Med 19:1015–1022
Migliorelli R, Teson A, Sabe L, Petracca G, Petracchi M, Leiguarda R, Starkstein SE (1995) Anosognosia in Alzheimer’s disease: a study of associated factors. J Neuropsychiatry Clin Neurosci 7:338–344
Clare L, Markova IS, Roth I, Morris RG (2011) Awareness in Alzheimer’s disease and associated dementias: theoretical framework and clinical implications. Aging Ment Health 15:936–944
Anderson NH (1968) Likableness ratings of 555 personality-trait words. J Pers Soc Psychol 9:272–279
Prigatano GP (1996) Neuropsychological rehabilitation after brain injury: Scientific and professional issues. J Clin Psychol Med Settings 3:1–10
Browne GB, Byrne C, Roberts J, Streiner D, Fitch M, Corey P, Arpin K (1988) The meaning of illness questionnaire: reliability and validity. Nurs Res 37:368–373
Irak M, Soylu C, Turan G, Capan D (2019) Neurobiological basis of feeling of knowing in episodic memory. Cogn Neurodyn 13:239–256
Ott BR, Lafleche G, Whelihan WM, Buongiorno GW, Albert MS, Fogel BS (1996) Impaired awareness of deficits in Alzheimer disease. Alzheimer Dis Assoc Disord 10:68–76
Gass CS, Patten B, Penate A, Rhodes A (2021) The Cognitive Difficulties Scale (CDS): psychometric characteristics in a clinical referral sample. J Int Neuropsychol Soc 27:351–364
Wear HJ, Wedderburn CJ, Mioshi E, Williams-Gray CH, Mason SL, Barker RA, Hodges JR (2008) The Cambridge Behavioural Inventory revised. Dement Neuropsychol 2:102–107
Davis MH (1983) Measuring individual differences in empathy: evidence for a multidimensional approach. J Pers Soc Psychol 44:113
White SJ, Coniston D, Rogers R, Frith U (2011) Develo** the Frith-Happe animations: a quick and objective test of Theory of Mind for adults with autism. Autism Res 4:149–154
Stone VE, Baron-Cohen S, Knight RT (1998) Frontal lobe contributions to theory of mind. J Cogn Neurosci 10:640–656
McDonald S, Flanagan S, Rollins J, Kinch J (2003) TASIT: a new clinical tool for assessing social perception after traumatic brain injury. J Head Trauma Rehabil 18:219–238
Carver CS, White TL (1994) Behavioral inhibition, behavioral activation, and affective responses to impending reward and punishment: the BIS/BAS scales. J Pers Soc Psychol 67:319
Bramham J, Morris RG, Hornak J, Bullock P, Polkey CE (2009) Social and emotional functioning following bilateral and unilateral neurosurgical prefrontal cortex lesions. J Neuropsychol 3:125–143
Lennox RD, Wolfe RN (1984) Revision of the self-monitoring scale. J Pers Soc Psychol 46:1349–1364
Cummings JL, Mega M, Gray K, Rosenberg-Thompson S, Carusi DA, Gornbein J (1994) The Neuropsychiatric Inventory: comprehensive assessment of psychopathology in dementia. Neurology 44:2308–2308
Funding
This work was supported by the European Research Council [Grant Number: StG2016_714388_NeuroTRACK] and the Foundation Research on Alzheimer Disease.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflicts of interest
M. Leocadi and A. Paldino report no disclosures. E. Canu has received research supports from the Italian Ministry of Health. F. Agosta is Associate Editor of NeuroImage: Clinical, has received speaker honoraria from Roche and Biogen Idec, and receives or has received research supports from the Italian Ministry of Health, AriSLA (Fondazione Italiana di Ricerca per la SLA), and the European Research Council. M. Filippi is Editor-in-Chief of the Journal of Neurology, Associate Editor of Human Brain Map**, Associate Editor of Radiology, and Associate Editor of Neurological Sciences; received compensation for consulting services and/or speaking activities from Alexion, Almirall, Bayer, Biogen, Celgene, Eli Lilly, Genzyme, Merck-Serono, Neopharmed Gentili, Novartis, Roche, Sanofi, Takeda, and Teva Pharmaceutical Industries; and receives research support from Biogen Idec, Merck-Serono, Novartis, Roche, Teva Pharmaceutical Industries, Italian Ministry of Health, Fondazione Italiana Sclerosi Multipla, and ARiSLA (Fondazione Italiana di Ricerca per la SLA).
Ethical approval
The manuscript does not contain clinical studies or patient data.
Consent
The manuscript does not contain clinical studies or patient data.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Leocadi, M., Canu, E., Paldino, A. et al. Awareness impairment in Alzheimer’s disease and frontotemporal dementia: a systematic MRI review. J Neurol 270, 1880–1907 (2023). https://doi.org/10.1007/s00415-022-11518-9
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00415-022-11518-9