{"id":44499,"date":"2026-02-18T07:59:07","date_gmt":"2026-02-18T07:59:07","guid":{"rendered":"https:\/\/doralhw.org\/parkinsons-disease-dementia-vs-lewy-body-dementia-key-differences-explained\/"},"modified":"2026-02-18T07:59:07","modified_gmt":"2026-02-18T07:59:07","slug":"parkinsons-disease-dementia-vs-lewy-body-dementia-key-differences-explained","status":"publish","type":"post","link":"https:\/\/doralhw.org\/parkinsons-disease-dementia-vs-lewy-body-dementia-key-differences-explained\/","title":{"rendered":"Parkinson\u2019s Disease Dementia vs. Lewy Body Dementia: Key Differences Explained"},"content":{"rendered":"<p><span data-contrast=\"none\">Navigating the landscape of\u00a0<\/span><a href=\"https:\/\/doralhw.org\/a-closer-look-at-different-dementia-syndromes\/\"><span data-contrast=\"none\">neurodegenerative diseases<\/span><\/a><span data-contrast=\"none\">\u00a0is challenging, especially when conditions share so many similarities. Two conditions that often confuse families and caregivers are Parkinson\u2019s disease dementia (PDD) and dementia with Lewy bodies (DLB). Both fall under the umbrella of Lewy body diseases because they share the same biological root: abnormal protein deposits in the brain. However, understanding the difference between Parkinson\u2019s disease dementia and Lewy body dementia is critical for proper medical management and setting realistic expectations. While the symptoms may eventually overlap, the journey to get there is distinct. This guide breaks down the timing, symptoms, and diagnostic criteria to help you distinguish between these two complex conditions.\u00a0<\/span><i><span data-contrast=\"none\">Visit the best\u00a0<\/span><\/i><b><i><span data-contrast=\"none\">Mental Health Clinic in Brooklyn at Doral Health &amp; Wellness, <\/span><\/i><\/b><i><span data-contrast=\"none\">or log on to<\/span><\/i><b><i><span data-contrast=\"none\">\u00a0<\/span><\/i><\/b><a href=\"https:\/\/doralhw.org\/\"><b><i><span data-contrast=\"none\">www.doralhw.org<\/span><\/i><\/b><\/a><b><i><span data-contrast=\"none\">\u00a0to\u00a0know more.<\/span><\/i><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/p>\n<p><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">The Difference Between Parkinson\u2019s Disease Dementia and Lewy Body Dementia<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:360,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">The most significant distinction between these two disorders\u00a0isn&#8217;t\u00a0<\/span><i><span data-contrast=\"none\">what<\/span><\/i><span data-contrast=\"none\">\u00a0symptoms appear, but\u00a0<\/span><i><span data-contrast=\"none\">when<\/span><\/i><span data-contrast=\"none\">\u00a0they appear. This timing is the golden rule for diagnosis.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">The &#8220;One-Year Rule&#8221;<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:280,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Medical professionals use a specific timeline to differentiate between the two conditions.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"1\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><a href=\"https:\/\/doralhw.org\/understanding-the-5-stages-of-parkinsons-disease-what-to-expect-as-symptoms-progress\/\"><b><span data-contrast=\"none\">Parkinson\u2019s Disease Dementia (PDD)<\/span><\/b><\/a><b><span data-contrast=\"none\">:<\/span><\/b><span data-contrast=\"none\">\u00a0In this scenario, the physical symptoms of Parkinson\u2019s disease\u2014such as tremors, stiffness, and slow movement\u2014appear first. Cognitive decline (dementia) develops much later, typically at least one year after the onset of movement symptoms, though it often takes many years.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"1\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><b><span data-contrast=\"none\">Dementia with Lewy Bodies (DLB):<\/span><\/b><span data-contrast=\"none\">\u00a0Here, the cognitive symptoms (memory loss, confusion, and problem-solving issues) appear before or at the same time as the physical\u00a0movement\u00a0symptoms.\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"none\">If dementia is present at the start or develops within one year of Parkinson &#8216;s-like movement issues, the diagnosis is usually DLB.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">Comparing Symptoms and Progression<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:360,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">While the timing varies, the eventual clinical picture can look\u00a0very similar. Both conditions affect the brain&#8217;s ability to process information and control the body.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">Cognitive and Behavioral Symptoms<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:280,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Both conditions share core cognitive challenges that differ from Alzheimer\u2019s disease.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"2\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><b><span data-contrast=\"none\">Executive Function:<\/span><\/b><span data-contrast=\"none\">\u00a0Patients struggle with planning, multitasking, and problem-solving more than with memory loss initially.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"2\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><b><span data-contrast=\"none\">Visual Hallucinations:<\/span><\/b><span data-contrast=\"none\">\u00a0Seeing people or animals that\u00a0aren&#8217;t\u00a0there is a hallmark of both conditions, though it is often an early and defining feature of DLB.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"2\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"3\" data-aria-level=\"1\"><b><span data-contrast=\"none\">Fluctuating Alertness:<\/span><\/b><span data-contrast=\"none\">\u00a0&#8220;Good days&#8221; and &#8220;bad days&#8221; are common. A patient might be alert and\u00a0conversant\u00a0one moment and drowsy or confused the next.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><b><span data-contrast=\"none\">Physical Movement Symptoms<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:280,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Because both diseases involve Lewy bodies, they both impact movement.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"3\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><b><span data-contrast=\"none\">Parkinsonism:<\/span><\/b><span data-contrast=\"none\">\u00a0This includes muscle rigidity, tremors (shaking), and a shuffling gait.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"3\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559683&quot;:0,&quot;335559684&quot;:-2,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><b><span data-contrast=\"none\">REM Sleep Behavior Disorder:<\/span><\/b><span data-contrast=\"none\">\u00a0Acting out\u00a0dreams physically (kicking, punching) is a strong predictor for both conditions.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><a href=\"https:\/\/doralhw.org\/assessing-cognitive-decline-simple-tests-every-family-should-know-for-early-detection\/\"><b><span data-contrast=\"none\">The Role of Professional Diagnosis<\/span><\/b><\/a><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:360,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Given the biological overlap, misdiagnosis is possible without expert evaluation. A behavioral health specialist plays a crucial role in untangling the timeline of symptoms. They will look at the patient&#8217;s medical history to pinpoint exactly when cognitive decline began\u00a0relative\u00a0to physical symptoms.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">This distinction matters because treatment plans differ. For instance, medications used to treat the movement symptoms of Parkinson&#8217;s can sometimes worsen the hallucinations associated with Lewy Body Dementia. Conversely, antipsychotics used for dementia behaviors can severely worsen physical movement symptoms.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/doralhw.org\/combating-cognitive-decline-and-dementia-your-ultimate-guide\/\"><b><span data-contrast=\"none\">Finding Expert Care<\/span><\/b><\/a><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:280,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">If you are noticing signs of cognitive decline in a loved one with Parkinson&#8217;s or seeing movement issues in someone with dementia, specialized care is essential. For those in the New York area, visiting\u00a0the Doral Health &amp; Wellness Mental Health Department\u00a0in Brooklyn provides access to neurologists and geriatric specialists who understand these nuances. These clinics can offer comprehensive neuropsychological testing to clarify the diagnosis.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Ultimately, the\u00a0difference between Parkinson\u2019s disease dementia and Lewy body dementia comes down to the order of operations: did the body slow down first, or did the mind? Regardless of the specific label, both conditions require compassionate, specialized care.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">If you are struggling to manage the changing needs of a loved one, do not hesitate to reach out for support.\u00a0Consulting\u00a0a behavioral health specialist can clarify the diagnosis and open the door to better symptom management. Contact a reputable mental health clinic in Brooklyn or a specialist near you today to ensure your family has the right roadmap for the journey ahead.\u00a0<\/span><b><span data-contrast=\"none\">For further inquiries, call us\u00a0on\u00a0+<\/span><\/b><b><i><span data-contrast=\"none\">1-<\/span><\/i><\/b><b><i><span data-contrast=\"none\">718-367-2555<\/span><\/i><\/b><b><span data-contrast=\"none\">\u00a0to get a consultation.<\/span><\/b><b><span data-contrast=\"none\">\u00a0Or<\/span><\/b><b><span data-contrast=\"none\">\u00a0log on to<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><a href=\"https:\/\/doralhw.org\/\"><span data-contrast=\"none\">www.doralw.org.<\/span><\/a><b><i><span data-contrast=\"none\">\u00a0Visit us at 1797 Pitkin Avenue, Brooklyn, NY 11212.\u00a0<\/span><\/i><\/b><b><span data-contrast=\"none\">If you need help, register your information and make direct contact with us at\u00a0<\/span><\/b><a href=\"https:\/\/yuz88hfiyh7.typeform.com\/Doralintake\" rel=\"nofollow noopener\" target=\"_blank\"><b><span data-contrast=\"none\">https:\/\/yuz88hfiyh7.typeform.com\/Doralintake<\/span><\/b><\/a><b><span data-contrast=\"none\">.<\/span><\/b><span data-ccp-props=\"{&quot;335551550&quot;:0,&quot;335551620&quot;:0}\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Confused by the diagnosis? We explain the difference between Parkinson\u2019s disease dementia and Lewy Body Dementia to help you understand the symptoms and care needs.<\/p>\n","protected":false},"author":7,"featured_media":44500,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[373],"tags":[],"class_list":["post-44499","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mental-health","post_format-post-format-standard"],"acf":[],"_links":{"self":[{"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/posts\/44499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/comments?post=44499"}],"version-history":[{"count":0,"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/posts\/44499\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/media\/44500"}],"wp:attachment":[{"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/media?parent=44499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/categories?post=44499"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/doralhw.org\/wp-json\/wp\/v2\/tags?post=44499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}