Dementia With Lewy Bodies Clinical Trial
— Alpha-DLBOfficial title:
Interventional Cross-over Study to Evaluate the Efficacy of Transcranial Alternating Current Stimulation (tACS) on Cognitive Performance in Patients With Dementia With Lewy Bodies
NCT number | NCT05188105 |
Other study ID # | NP4758 |
Secondary ID | |
Status | Completed |
Phase | N/A |
First received | |
Last updated | |
Start date | October 18, 2021 |
Est. completion date | March 20, 2024 |
Verified date | March 2024 |
Source | Azienda Socio Sanitaria Territoriale degli Spedali Civili di Brescia |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
Brain oscillations are ubiquitous in the human brain and have been implicated in cognitive and behavioral states defined in precisely tuned neural networks. In neurodegenerative disorders, neurodegeneration is accompanied by changes in oscillatory activity leading to the emerging concept of neurological and psychiatric disorders as "oscillopathies". Dementia with Lewy bodies (DLB), which is the second most frequent cause of neurodegenerative dementia, is characterized by an important alteration of brain oscillations. The restoration of oscillations by neuronal entrainment in animal models of neurodegenerative disease has shown a significant reduction in the neuropathological load of toxic proteins, with a consequent significant increase in cognitive performance. Transcranial alternating current brain stimulation (tACS), is a neurophysiological method of non-invasive modulation of the excitability of the central nervous system that is having an increasingly numerous spectrum of potential therapeutic applications. Recent studies have demonstrated the effectiveness of this method in modulating the natural frequencies of cerebral oscillation, underlying multiple cognitive processes such as verbal memory, perception and working memory. On the basis of these premises, the treatment with alpha tACS is proposed in patients with DLB. In this randomized, double-blind, sham-controlled, cross-over study, the investigators will evaluate whether a single stimulation with alpha tACS on the occipital lobes can improve symptoms in patients with DLB.
Status | Completed |
Enrollment | 15 |
Est. completion date | March 20, 2024 |
Est. primary completion date | March 10, 2024 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years and older |
Eligibility | Inclusion Criteria: - Dementia with Lewy bodies (criteria according to McKeith, Neurology 2017). Exclusion Criteria: - Cerebrovascular disorders, previous stroke, hydrocephalus, and intra-cranial mass documented by MRI. - History of traumatic brain injury or other neurological diseases. - Serious medical illness other than DLB - History of seizures - Pregnancy - Metal implants in the head (except dental fillings) - Electronic implants (i.e. pace-maker, implanted medical pump) - Age <18 years |
Country | Name | City | State |
---|---|---|---|
Italy | ASST Spedali Civili di Brescia | Brescia | BS |
Lead Sponsor | Collaborator |
---|---|
Azienda Socio Sanitaria Territoriale degli Spedali Civili di Brescia |
Italy,
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* Note: There are 16 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Changes in Visual Search Task Test scores | The visual search task requires participants to determine whether a target (such as a particular letter, shape, or image) is present in an array of other stimuli. The task consists of two parts, each with 64 stimuli, for a total of 128 stimuli. Participants are asked to look at the screen and press a button if the target stimulus is present or another button if the target stimulus is absent. After pressing the chosen button, a feedback will appear on the screen that will tell the subject if his answer is correct or incorrect. Subjects must respond as quickly as possible, otherwise the answer will be considered missed and they will proceed to the next screen.
The score ranges from 0 (worse performance) to 128 (best performance). |
40 minutes after the start of the intervention | |
Secondary | Changes in Rey Auditory Verbal Learning Test scores | Participants are given a list of 15 unrelated words repeated over five different trials and are asked to repeat. Another list of 15 unrelated words are given and the patient must again repeat the original list of 15 words and then again after 30 minutes.
The score ranges from 0 (worse performance) to 15 (best performance). |
Baseline (immediately before the intervention) - Immediately after the intervention | |
Secondary | Changes in Trail Making Test Part A | The Trail Making Test Part A consists of 25 circles on a piece of paper with the numbers 1-25 written randomly in the circles. The test taker's task is to start with number one and draw a line from that circle to the circle with the number two in it to the circle with the three in it, etc. The person continues to connect the circles in numerical order until they reach number 25.
Scoring is based on time taken to complete the test with lower scores being better. |
Baseline (immediately before the intervention) - Immediately after the intervention | |
Secondary | Changes in Trail Making Test Part B | The Trail Making Test Part B consists of 24 circles on a piece of paper, but rather than all of the circles containing numbers, half of the circles have the numbers 1-12 in them and the other half (12) contain the letters A-L. The person taking the test has to draw a line from one circle to the next in ascending order; however, he must alternate the circles with numbers in them (1-13) with circles with letters in them (A-L). In other words, he is to connect the circles in order like this: 1-A-2-B-3-C-4-D-5-E and so on.
Scoring is based on time taken to complete the test with lower scores being better. |
Baseline (immediately before the intervention) - Immediately after the intervention | |
Secondary | Changes in relative alpha power in occipital EEG leads | By using electroencephalography (EEG), the investigators will evaluate the effects of alpha tACS on relative alpha power in occipital EEG leads. | Baseline (immediately before the intervention) - Immediately after the intervention | |
Secondary | Change in SAI measurements | By using transcranial magnetic stimulation (TMS), the investigators will evaluate the effects of alpha tACS on short latency afferent inhibition (SAI), which is a marker of cholinergic transmission. | Baseline (immediately before the intervention) - Immediately after the intervention | |
Secondary | Change in SICI measurements | By using transcranial magnetic stimulation (TMS), the investigators will evaluate the effects of alpha tACS on short interval intracortical inhibition (SICI), which is a marker of GABAergic transmission. | Baseline (immediately before the intervention) - Immediately after the intervention | |
Secondary | Change in ICF measurements | By using transcranial magnetic stimulation (TMS), the investigators will evaluate the effects of alpha tACS on intracortical facilitation (ICF), which is a marker of glutamatergic transmission. | Baseline (immediately before the intervention) - Immediately after the intervention |
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