Harvard Catalyst Profiles

Contact, publication, and social network information about Harvard faculty and fellows.

Keith Alan Johnson, M.D.

Co-Author

This page shows the publications co-authored by Keith Johnson and Gad Marshall.
Connection Strength

6.585
  1. Regional Tau Correlates of Instrumental Activities of Daily Living and Apathy in Mild Cognitive Impairment and Alzheimer's Disease Dementia. J Alzheimers Dis. 2019; 67(2):757-768.
    View in: PubMed
    Score: 0.818
  2. Instrumental activities of daily living impairment is associated with increased amyloid burden. Dement Geriatr Cogn Disord. 2011; 31(6):443-50.
    View in: PubMed
    Score: 0.488
  3. Instrumental activities of daily living, amyloid, and cognition in cognitively normal older adults screening for the A4 Study. Alzheimers Dement (Amst). 2020; 12(1):e12118.
    View in: PubMed
    Score: 0.232
  4. The neurophysiology and seizure outcomes of late onset unexplained epilepsy. Clin Neurophysiol. 2020 11; 131(11):2667-2672.
    View in: PubMed
    Score: 0.230
  5. Association of Amyloid and Tau With Cognition in Preclinical Alzheimer Disease: A Longitudinal Study. JAMA Neurol. 2019 Aug 01; 76(8):915-924.
    View in: PubMed
    Score: 0.213
  6. The impact of amyloid-beta and tau on prospective cognitive decline in older individuals. Ann Neurol. 2019 02; 85(2):181-193.
    View in: PubMed
    Score: 0.205
  7. Measuring instrumental activities of daily living in non-demented elderly: a comparison of the new performance-based Harvard Automated Phone Task with other functional assessments. Alzheimers Res Ther. 2019 01 10; 11(1):4.
    View in: PubMed
    Score: 0.205
  8. Depressive Symptoms and Tau Accumulation in the Inferior Temporal Lobe and Entorhinal Cortex in Cognitively Normal Older Adults: A Pilot Study. J Alzheimers Dis. 2017; 59(3):975-985.
    View in: PubMed
    Score: 0.178
  9. Activities of daily living measured by the Harvard Automated Phone Task track with cognitive decline over time in non-demented elderly. J Prev Alzheimers Dis. 2017; 4(2):81-86.
    View in: PubMed
    Score: 0.178
  10. Temporal T807 binding correlates with CSF tau and phospho-tau in normal elderly. Neurology. 2016 Aug 30; 87(9):920-6.
    View in: PubMed
    Score: 0.173
  11. Maternal dementia age at onset in relation to amyloid burden in non-demented elderly offspring. Neurobiol Aging. 2016 Apr; 40:61-67.
    View in: PubMed
    Score: 0.166
  12. Tau positron emission tomographic imaging in aging and early Alzheimer disease. Ann Neurol. 2016 Jan; 79(1):110-9.
    View in: PubMed
    Score: 0.166
  13. The Harvard Automated Phone Task: new performance-based activities of daily living tests for early Alzheimer's disease. J Prev Alzheimers Dis. 2015 Dec; 2(4):242-253.
    View in: PubMed
    Score: 0.165
  14. Cognitive activity relates to cognitive performance but not to Alzheimer disease biomarkers. Neurology. 2015 Jul 07; 85(1):48-55.
    View in: PubMed
    Score: 0.160
  15. Odor identification and Alzheimer disease biomarkers in clinically normal elderly. Neurology. 2015 May 26; 84(21):2153-60.
    View in: PubMed
    Score: 0.159
  16. Functional Activities Questionnaire Items that Best Discriminate and Predict Progression from Clinically Normal to Mild Cognitive Impairment. Curr Alzheimer Res. 2015; 12(5):493-502.
    View in: PubMed
    Score: 0.155
  17. Depressive Symptoms and Biomarkers of Alzheimer's Disease in Cognitively Normal Older Adults. J Alzheimers Dis. 2015; 46(1):63-73.
    View in: PubMed
    Score: 0.155
  18. The Apathy Evaluation Scale: A Comparison of Subject, Informant, and Clinician Report in Cognitively Normal Elderly and Mild Cognitive Impairment. J Alzheimers Dis. 2015; 47(2):421-32.
    View in: PubMed
    Score: 0.155
  19. Neuropsychiatric Symptoms and Functional Connectivity in Mild Cognitive Impairment. J Alzheimers Dis. 2015; 46(3):727-35.
    View in: PubMed
    Score: 0.155
  20. Apathy is associated with lower inferior temporal cortical thickness in mild cognitive impairment and normal elderly individuals. J Neuropsychiatry Clin Neurosci. 2015; 27(1):e22-7.
    View in: PubMed
    Score: 0.153
  21. Regional fluorodeoxyglucose metabolism and instrumental activities of daily living across the Alzheimer's disease spectrum. J Alzheimers Dis. 2014; 42(1):291-300.
    View in: PubMed
    Score: 0.145
  22. Regional cortical thinning and cerebrospinal biomarkers predict worsening daily functioning across the Alzheimer's disease spectrum. J Alzheimers Dis. 2014; 41(3):719-28.
    View in: PubMed
    Score: 0.145
  23. Neuropsychiatric symptoms and global functional impairment along the Alzheimer's continuum. Dement Geriatr Cogn Disord. 2012; 34(2):96-111.
    View in: PubMed
    Score: 0.132
  24. Executive function and instrumental activities of daily living in mild cognitive impairment and Alzheimer's disease. Alzheimers Dement. 2011 May; 7(3):300-8.
    View in: PubMed
    Score: 0.120
  25. Amyloid-ß associated cortical thinning in clinically normal elderly. Ann Neurol. 2011 Jun; 69(6):1032-42.
    View in: PubMed
    Score: 0.119
  26. Amyloid deposition is associated with impaired default network function in older persons without dementia. Neuron. 2009 Jul 30; 63(2):178-88.
    View in: PubMed
    Score: 0.106
  27. Unsupervised mobile cognitive testing for use in preclinical Alzheimer's disease. Alzheimers Dement (Amst). 2021; 13(1):e12243.
    View in: PubMed
    Score: 0.062
  28. Association of cortical microstructure with amyloid-ß and tau: impact on cognitive decline, neurodegeneration, and clinical progression in older adults. Mol Psychiatry. 2021 Sep 29.
    View in: PubMed
    Score: 0.062
  29. Association of subjective cognitive decline with markers of brain pathology in preclinical autosomal dominant Alzheimer's disease. J Neurol Neurosurg Psychiatry. 2020 03; 91(3):330-332.
    View in: PubMed
    Score: 0.055
  30. Associations of Physical Activity and ß-Amyloid With Longitudinal Cognition and Neurodegeneration in Clinically Normal Older Adults. JAMA Neurol. 2019 Oct 01; 76(10):1203-1210.
    View in: PubMed
    Score: 0.054
  31. Longitudinal Association of Depression Symptoms With Cognition and Cortical Amyloid Among Community-Dwelling Older Adults. JAMA Netw Open. 2019 08 02; 2(8):e198964.
    View in: PubMed
    Score: 0.053
  32. Inferior and medial temporal tau and cortical amyloid are associated with daily functional impairment in Alzheimer's disease. Alzheimers Res Ther. 2019 01 31; 11(1):14.
    View in: PubMed
    Score: 0.051
  33. Vascular Risk and ß-Amyloid Are Synergistically Associated with Cortical Tau. Ann Neurol. 2019 02; 85(2):272-279.
    View in: PubMed
    Score: 0.051
  34. An UNC5C Allele Predicts Cognitive Decline and Hippocampal Atrophy in Clinically Normal Older Adults. J Alzheimers Dis. 2019; 68(3):1161-1170.
    View in: PubMed
    Score: 0.051
  35. Amyloid-associated increases in longitudinal report of subjective cognitive complaints. Alzheimers Dement (N Y). 2018; 4:444-449.
    View in: PubMed
    Score: 0.050
  36. Interactive Associations of Vascular Risk and ß-Amyloid Burden With Cognitive Decline in Clinically Normal Elderly Individuals: Findings From the Harvard Aging Brain Study. JAMA Neurol. 2018 09 01; 75(9):1124-1131.
    View in: PubMed
    Score: 0.050
  37. PET staging of amyloidosis using striatum. Alzheimers Dement. 2018 10; 14(10):1281-1292.
    View in: PubMed
    Score: 0.049
  38. 18F-florbetapir Positron Emission Tomography-determined Cerebral ß-Amyloid Deposition and Neurocognitive Performance after Cardiac Surgery. Anesthesiology. 2018 04; 128(4):728-744.
    View in: PubMed
    Score: 0.049
  39. Longitudinal Association of Amyloid Beta and Anxious-Depressive Symptoms in Cognitively Normal Older Adults. Am J Psychiatry. 2018 06 01; 175(6):530-537.
    View in: PubMed
    Score: 0.048
  40. Interactive versus additive relationships between regional cortical thinning and amyloid burden in predicting clinical decline in mild AD and MCI individuals. Neuroimage Clin. 2018; 17:388-396.
    View in: PubMed
    Score: 0.047
  41. Functional network integrity presages cognitive decline in preclinical Alzheimer disease. Neurology. 2017 Jul 04; 89(1):29-37.
    View in: PubMed
    Score: 0.046
  42. Anosognosia for memory deficits in mild cognitive impairment: Insight into the neural mechanism using functional and molecular imaging. Neuroimage Clin. 2017; 15:408-414.
    View in: PubMed
    Score: 0.046
  43. Hippocampal hypometabolism in older adults with memory complaints and increased amyloid burden. Neurology. 2017 May 02; 88(18):1759-1767.
    View in: PubMed
    Score: 0.045
  44. Early and late change on the preclinical Alzheimer's cognitive composite in clinically normal older individuals with elevated amyloid ß. Alzheimers Dement. 2017 Sep; 13(9):1004-1012.
    View in: PubMed
    Score: 0.045
  45. Regional 18F-Fluorodeoxyglucose Hypometabolism is Associated with Higher Apathy Scores Over Time in Early Alzheimer Disease. Am J Geriatr Psychiatry. 2017 Jul; 25(7):683-693.
    View in: PubMed
    Score: 0.045
  46. Association of Higher Cortical Amyloid Burden With Loneliness in Cognitively Normal Older Adults. JAMA Psychiatry. 2016 Dec 01; 73(12):1230-1237.
    View in: PubMed
    Score: 0.044
  47. Heterogeneity in Suspected Non-Alzheimer Disease Pathophysiology Among Clinically Normal Older Individuals. JAMA Neurol. 2016 Oct 01; 73(10):1185-1191.
    View in: PubMed
    Score: 0.044
  48. Lower Late-Life Body-Mass Index is Associated with Higher Cortical Amyloid Burden in Clinically Normal Elderly. J Alzheimers Dis. 2016 06 18; 53(3):1097-105.
    View in: PubMed
    Score: 0.043
  49. Subjective cognitive concerns, amyloid-ß, and neurodegeneration in clinically normal elderly. Neurology. 2015 Jul 07; 85(1):56-62.
    View in: PubMed
    Score: 0.040
  50. Amyloid-ß deposition in mild cognitive impairment is associated with increased hippocampal activity, atrophy and clinical progression. Brain. 2015 Apr; 138(Pt 4):1023-35.
    View in: PubMed
    Score: 0.039
  51. Vascular disease and risk factors are associated with cognitive decline in the alzheimer disease spectrum. Alzheimer Dis Assoc Disord. 2015 Jan-Mar; 29(1):18-25.
    View in: PubMed
    Score: 0.039
  52. Subjective cognitive concerns and neuropsychiatric predictors of progression to the early clinical stages of Alzheimer disease. Am J Geriatr Psychiatry. 2014 Dec; 22(12):1642-51.
    View in: PubMed
    Score: 0.037
  53. Regional cortical thinning predicts worsening apathy and hallucinations across the Alzheimer disease spectrum. Am J Geriatr Psychiatry. 2014 Nov; 22(11):1168-79.
    View in: PubMed
    Score: 0.035
  54. Association of common genetic variants in GPCPD1 with scaling of visual cortical surface area in humans. Proc Natl Acad Sci U S A. 2012 Mar 06; 109(10):3985-90.
    View in: PubMed
    Score: 0.032
Connection Strength
The connection strength for co-authors is the sum of the scores for each of their shared publications.

Publication scores are based on many factors, including how long ago they were written and whether the person is a first or senior author.
Funded by the NIH National Center for Advancing Translational Sciences through its Clinical and Translational Science Awards Program, grant number UL1TR002541.