Lewy body dementia symptoms
Lewy Body Dementia Symptoms

23 Lewy Body Dementia Symptoms

Lewy body Dementia (LBD) is a type of progressive dementia that leads to a decline in thought, reasoning and independent functions due to abnormal microscopic deposits that damage brain cells as time passes.

About Lewy Body dementia

Most experts estimate that Lewy body dementia (LBD) is the third most common cause of dementia after Alzheimer’s disease and vascular dementia, accounting for 10 to 25 percent of cases.

The brain-specific abnormality associated with Lewy body dementia (LBD) was named by Frederich H. Lewy, M.D., a neurologist who invented them while working in Dr. Alois Alzheimer’s laboratory during the early 1900’s. Alpha-synuclein proteins, Lewy’s body main components, are widely found in the brain, but their normal functions are not yet known.

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Lewy Body Dementia Symptoms

Symptoms of LBD can vary, you can find all of these symptoms or only a few. The symptoms of LBD include:

Cognitive symptoms in LBD sufferer


Loss of severe thinking ability that interferes with a person’s capacity in conducting daily activities. Dementia is a key symptom of LBD and usually it has to be impaired by attention, visual and spatial ability (assessing distance and depth or failure in identifying an object), difficulty in making plans, multitasking, problem solving, and reasoning.

Memory impairment does not occur at first, but appears as the disease progresses. Dementia can also include changes in mood and behavior, poor judgment, loss of initiative, confusion over time and place, and difficulties with language and numbers.

Learn more about Signs of dementia

Cognitive fluctuations

Cognitive flunctuations is one of Lewy Body Dementia Symptoms.

Changes in concentration, attention, unexpected alertness from day to day and sometimes occurs throughout the day. People with LBD appear sleepy and lethargic or asleep for a few hours in the daytime despite having enough sleep at night.

The LBD sufferer will also have a plot of irregular, unclear, or unreasonable ideas at a time. The LBD sufferer seemed better one day, but worse the next day. Symptoms of cognitive fluctuations often occur in LBD sufferer and become one of the differentiator of Alzheimer’s.


80 percent of people with LBD has visual hallucinations or seeing things that are not actually present. Non-visual hallucinations, such as hearing or smelling the scent of something that is not actually present, it can occur, but less frequently than visual hallucinations.

Motion Disorder in LBD Sufferer

Motion disorder is one of Lewy Body Dementia Symptoms.

Some LBD sufferer can experience a significant movement interruption in the early stages, but some of the LBD sufferer has not experienced it until a few years. At first, the symptoms of movement disorder may occur very mild and often overlooked like a handwriting change.

Sleep disturbances in LBD sufferer

In LBD sufferer, sleep disorder often occurs, but often not diagnosed. Sleep-related disorders experienced by LBD sufferer, among others:

REM Sleep Behavior Disorder (RBD)

REM Sleep Behavior Disorder (RBD), which is a condition in which LBD is likely to portray a dream while sleeping like talking while sleeping, a rough / great movement when sleeping or to fall from the bed. RBD can be an early symptom in some people and occur on a chronic basis before other LBD symptoms arise.

Excessive Daytime Sleepiness

Excessive daytime sleepiness is one of Lewy Body Dementia Symptoms.

Excessive Daytime Sleepiness, which is sleep for 2 hours or more in the daytime, although it already has enough sleep time at night.


Insomnia, which is difficult to sleep or often wakes up while sleeping.

Restless Leg Syndrome

Restless Leg Syndrome is a condition in which the sufferer feels unpleasant or unusual sensation in his feet at rest, giving rise to the urge to move and stomp the feet.

Behavior changes and Mood on LBD Sufferer

Depression, that is, feelings of sadness, worthlessness, or inability to enjoy the activity continuously and often accompanied by difficulties to sleep and eat.


Apathy, which is a lack of interest in normal daily activities and less social interaction.


Anxious, a deep concern or fear of a situation or future. The complainant can ask the same question repeatedly or become angry or afraid when the worries do not exist.


Agitation, that is the anxiety that can look like pacing, hand wringing, repeating words or phrases, and irritability.


Lewy body dementia symptoms - delusions
23 Lewy Body Dementia Symptoms 2

Delusions, that is has a very strong belief in something that does not conform to reality or it is not based on evidence such as thinking that long-dead relatives are still alive or his spouse is having an affair.


Paranoid, that is to have an extreme suspicion and irrational like a person’s suspicion of taking or hiding something.

LBD sufferer can also undergo significant changes to the part of the nervous system that regulate the automatic functioning of the body, such as the heart, glands, and muscles so that the LBD sufferer can experience other symptoms such as the following:

  • Changes in body temperature
  • Blood pressure disorders
  • Dizziness
  • Faint
  • Often falls
  • Sensitive to heat and cold
  • Se**xual dysfunction
  • Urinary incontinence
  • Constipation
  • Decreased smell sense ability

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Frontotemporal Dementia: Definition, Causes, Symptoms, Diagnosis, and Treatment

Thank you very much for reading Lewy Body Dementia Symptoms, hopefully useful.

Last Updated on August 9, 2020 Reviewed by Market Health Beauty Team

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