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Psychiatry1136 papers

Organic memory impairment

Last edited: 4/14/2026

Overview

Organic memory impairment refers to cognitive deficits affecting memory functions due to underlying neurological or medical conditions, distinct from normal aging or psychological factors. It encompasses various etiologies including medication side effects, nutritional deficiencies, and systemic diseases affecting brain function 13910.

Diagnosis

  • Clinical History and Symptoms: Detailed patient history focusing on onset, progression, and associated symptoms 7.
  • Neuropsychological Testing: Assessment of memory functions, including working memory, declarative memory, and executive function 7.
  • Imaging Studies: MRI or CT scans to identify structural abnormalities such as atrophy or lesions 7.
  • Laboratory Tests: Blood tests to rule out metabolic or nutritional deficiencies (e.g., vitamin B1, magnesium levels) 3.
  • EEG: Electroencephalography to evaluate electrical activity patterns indicative of specific disorders 2.
  • Cognitive Screening Tools: Mini-Mental State Examination (MMSE) or Montreal Cognitive Assessment (MoCA) for initial screening 915.

    • Management

  • Address Underlying Causes: Treat or manage underlying conditions (e.g., nutritional deficiencies, medication side effects) 3110.
  • Cognitive Rehabilitation: Engage patients in structured cognitive exercises to improve memory function 7.
  • Medication Review: Regularly review and adjust medications to minimize anticholinergic burden and other memory-impairing drugs 17.
  • Supplementation: Correct deficiencies with appropriate vitamin and mineral supplements under medical supervision 3.
  • Lifestyle Modifications: Encourage healthy lifestyle changes including diet, exercise, and cognitive stimulation 3.
  • Psychosocial Support: Provide support through counseling or support groups to address emotional and psychological impacts 5.

    • Special Populations

  • Elderly: Increased risk of memory impairment due to age-related changes and higher prevalence of comorbidities 915.
  • Comorbidities: Patients with systemic diseases (e.g., cardiovascular conditions) may require tailored management addressing both conditions 25.
  • Anticholinergic Medications: Older adults with memory problems should avoid medications with significant anticholinergic effects 17.

    • Key Recommendations

  • Regular Neuropsychological Assessment: Monitor cognitive function regularly to detect early signs of memory impairment (Evidence: Moderate 7).
  • Evaluate and Manage Medication Side Effects: Routinely review medications to minimize those associated with memory impairment (Evidence: Strong 11017).
  • Address Nutritional Deficiencies: Screen for and correct deficiencies in essential nutrients like vitamin B1 and magnesium (Evidence: Moderate 3).
  • Consider Imaging and Laboratory Tests: Utilize neuroimaging and laboratory tests to identify underlying causes of memory impairment (Evidence: Moderate 739).
  • Implement Cognitive Rehabilitation Programs: Engage patients in structured cognitive rehabilitation to enhance memory function (Evidence: Expert opinion 7).

    • References

    1 Mao M, Wang M, Yu Q, Chen Q, Zhu H, Wan T et al.. Updated insights on memory disorder associated risk of medication: A real-world pharmacovigilance analysis. Journal of affective disorders 2025. link 2 Chang WS, Liang WK, Li DH, Muggleton NG, Balachandran P, Huang NE et al.. The association between working memory precision and the nonlinear dynamics of frontal and parieto-occipital EEG activity. Scientific reports 2023. link 3 Kida S. Essential Roles of Nutrient Factors in Learning and Memory. Journal of nutritional science and vitaminology 2022. link 4 Hunter P. Helpful amnesia: Neuroscience unravels the role of forgetting as a prerequisite for establishing new long-term memories. EMBO reports 2021. link 5 Park S, Kawk M, Spencer B, Berit ID. Team mentored reflective practice in gerontological social work education. Gerontology & geriatrics education 2021. link 6 Luine V, Frankfurt M. Estrogenic regulation of memory: The first 50 years. Hormones and behavior 2020. link 7 Ruchinskas RA, Cullum CM. Neuropsychology in a Memory Disorder Clinic. Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists 2018. link 8 Fried I. Brain stimulation and memory. Brain : a journal of neurology 2015. link 9 Okamoto N, Morikawa M, Tomioka K, Yanagi M, Amano N, Kurumatani N. Association between tooth loss and the development of mild memory impairment in the elderly: the Fujiwara-kyo Study. Journal of Alzheimer's disease : JAD 2015. link 10 Chavant F, Favrelière S, Lafay-Chebassier C, Plazanet C, Pérault-Pochat MC. Memory disorders associated with consumption of drugs: updating through a case/noncase study in the French PharmacoVigilance Database. British journal of clinical pharmacology 2011. link 11 Yehuda R, Joëls M, Morris RG. The memory paradox. Nature reviews. Neuroscience 2010. link 12 Pastoret PP. It's all about memory!. Journal of comparative pathology 2010. link 13 Yue-Chun L, Li-Sha G, Xue-Qiang G, Peng C, Lian-Pin W, Peng-Lin Y et al.. Establishment of a canine model of cardiac memory using endocardial pacing via internal jugular vein. BMC cardiovascular disorders 2010. link 14 Van Ruitenbeek P, Vermeeren A, Riedel WJ. Memory in humans is unaffected by central H1-antagonism, while objectively and subjectively measured sedation is increased. European neuropsychopharmacology : the journal of the European College of Neuropsychopharmacology 2010. link 15 Okamoto N, Morikawa M, Okamoto K, Habu N, Hazaki K, Harano A et al.. Tooth loss is associated with mild memory impairment in the elderly: the Fujiwara-kyo study. Brain research 2010. link 16 Krishnan J, Sachdeva G, Chakravarthy VS, Radhakrishnan S. Interpreting voltage-sensitivity of gap junctions as a mechanism of cardiac memory. Mathematical biosciences 2008. link 17 Kemper RF, Steiner V, Hicks B, Pierce L, Iwuagwu C. Anticholinergic medications: use among older adults with memory problems. Journal of gerontological nursing 2007. link 18 Arndt J, Passannante A, Hirshman E. The effect of midazolam on implicit and explicit memory in category exemplar production and category cued recall. Memory (Hove, England) 2004. link 19 Loftus EF. Make-believe memories. The American psychologist 2003. link 20 Huron C, Servais C, Danion JM. Lorazepam and diazepam impair true, but not false, recognition in healthy volunteers. Psychopharmacology 2001. link 21 McGaugh JL, Izquierdo I. The contribution of pharmacology to research on the mechanisms of memory formation. Trends in pharmacological sciences 2000. link01473-5) 22 Buffett-Jerrott SE, Stewart SH, Bird S, Teehan MD. An examination of differences in the time course of oxazepam's effects on implicit vs explicit memory. Journal of psychopharmacology (Oxford, England) 1998. link 23 Pope KS. Memory, abuse, and science. Questioning claims about the false memory syndrome epidemic. The American psychologist 1996. link 24 Wright DB, Anderson SJ. Comments on Scott and Ponsoda's (1996) positive and negative flashbulb memories. Psychological reports 1996. link 25 Mikkelsen S, Jørgensen M, Browne E, Gyldensted C. Mixed solvent exposure and organic brain damage. A study of painters. Acta neurologica Scandinavica. Supplementum 1988. link 26 . Scientific status of refreshing recollection by the use of hypnosis. Council on Scientific Affairs. JAMA 1985. link 27 Tulving E. Retrograde amnesia in free recall. Science (New York, N.Y.) 1969. link

    Original source

    1. [1]
      Updated insights on memory disorder associated risk of medication: A real-world pharmacovigilance analysis. — Mao M, Wang M, Yu Q, Chen Q, Zhu H, Wan T et al. Journal of affective disorders (2025)
    2. [2]
      The association between working memory precision and the nonlinear dynamics of frontal and parieto-occipital EEG activity. — Chang WS, Liang WK, Li DH, Muggleton NG, Balachandran P, Huang NE et al. Scientific reports (2023)
    3. [3]
      Essential Roles of Nutrient Factors in Learning and Memory. — Kida S Journal of nutritional science and vitaminology (2022)
    4. [4]
      Helpful amnesia: Neuroscience unravels the role of forgetting as a prerequisite for establishing new long-term memories. — Hunter P EMBO reports (2021)
    5. [5]
      Team mentored reflective practice in gerontological social work education. — Park S, Kawk M, Spencer B, Berit ID Gerontology & geriatrics education (2021)
    6. [6]
      Estrogenic regulation of memory: The first 50 years. — Luine V, Frankfurt M Hormones and behavior (2020)
    7. [7]
      Neuropsychology in a Memory Disorder Clinic. — Ruchinskas RA, Cullum CM Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists (2018)
    8. [8]
      Brain stimulation and memory. — Fried I Brain : a journal of neurology (2015)
    9. [9]
      Association between tooth loss and the development of mild memory impairment in the elderly: the Fujiwara-kyo Study. — Okamoto N, Morikawa M, Tomioka K, Yanagi M, Amano N, Kurumatani N Journal of Alzheimer's disease : JAD (2015)
    10. [10]
      Memory disorders associated with consumption of drugs: updating through a case/noncase study in the French PharmacoVigilance Database. — Chavant F, Favrelière S, Lafay-Chebassier C, Plazanet C, Pérault-Pochat MC British journal of clinical pharmacology (2011)
    11. [11]
      The memory paradox. — Yehuda R, Joëls M, Morris RG Nature reviews. Neuroscience (2010)
    12. [12]
      It's all about memory! — Pastoret PP Journal of comparative pathology (2010)
    13. [13]
      Establishment of a canine model of cardiac memory using endocardial pacing via internal jugular vein. — Yue-Chun L, Li-Sha G, Xue-Qiang G, Peng C, Lian-Pin W, Peng-Lin Y et al. BMC cardiovascular disorders (2010)
    14. [14]
      Memory in humans is unaffected by central H1-antagonism, while objectively and subjectively measured sedation is increased. — Van Ruitenbeek P, Vermeeren A, Riedel WJ European neuropsychopharmacology : the journal of the European College of Neuropsychopharmacology (2010)
    15. [15]
      Tooth loss is associated with mild memory impairment in the elderly: the Fujiwara-kyo study. — Okamoto N, Morikawa M, Okamoto K, Habu N, Hazaki K, Harano A et al. Brain research (2010)
    16. [16]
      Interpreting voltage-sensitivity of gap junctions as a mechanism of cardiac memory. — Krishnan J, Sachdeva G, Chakravarthy VS, Radhakrishnan S Mathematical biosciences (2008)
    17. [17]
      Anticholinergic medications: use among older adults with memory problems. — Kemper RF, Steiner V, Hicks B, Pierce L, Iwuagwu C Journal of gerontological nursing (2007)
    18. [18]
      The effect of midazolam on implicit and explicit memory in category exemplar production and category cued recall. — Arndt J, Passannante A, Hirshman E Memory (Hove, England) (2004)
    19. [19]
      Make-believe memories. — Loftus EF The American psychologist (2003)
    20. [20]
      Lorazepam and diazepam impair true, but not false, recognition in healthy volunteers. — Huron C, Servais C, Danion JM Psychopharmacology (2001)
    21. [21]
      The contribution of pharmacology to research on the mechanisms of memory formation. — McGaugh JL, Izquierdo I Trends in pharmacological sciences (2000)
    22. [22]
      An examination of differences in the time course of oxazepam's effects on implicit vs explicit memory. — Buffett-Jerrott SE, Stewart SH, Bird S, Teehan MD Journal of psychopharmacology (Oxford, England) (1998)
    23. [23]
      Memory, abuse, and science. Questioning claims about the false memory syndrome epidemic. — Pope KS The American psychologist (1996)
    24. [24]
      Comments on Scott and Ponsoda's (1996) positive and negative flashbulb memories. — Wright DB, Anderson SJ Psychological reports (1996)
    25. [25]
      Mixed solvent exposure and organic brain damage. A study of painters. — Mikkelsen S, Jørgensen M, Browne E, Gyldensted C Acta neurologica Scandinavica. Supplementum (1988)
    26. [26]
      Scientific status of refreshing recollection by the use of hypnosis. Council on Scientific Affairs. JAMA (1985)
    27. [27]
      Retrograde amnesia in free recall. — Tulving E Science (New York, N.Y.) (1969)
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