{"id":10984,"date":"2025-12-01T16:17:11","date_gmt":"2025-12-01T14:17:11","guid":{"rendered":"https:\/\/medilab.km.ua\/?p=10984"},"modified":"2026-04-20T18:53:29","modified_gmt":"2026-04-20T15:53:29","slug":"diagnostics-of-neurodegenerative-diseases-as-modern-medicine-reveals-brain-dysfunction","status":"publish","type":"post","link":"https:\/\/medilab.km.ua\/en\/diagnostics-of-neurodegenerative-diseases-as-modern-medicine-reveals-brain-dysfunction\/","title":{"rendered":"Diagnosis of neurodegenerative diseases: how modern medicine detects brain disorders"},"content":{"rendered":"
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Neurodegenerative diseases are one of the most complex problems in modern neurology. They develop slowly, affecting nerve cells and gradually impairing cognitive, motor and behavioral functions. According to WHO, the number of patients with dementia is increasing every year, and early diagnosis remains the main tool that allows you to extend the quality of life and delay complications.<\/p>\n

Unlike many acute conditions, neurodegenerative processes rarely manifest themselves immediately. Therefore, modern diagnostics are based on a combination of biomarkers, instrumental methods, and assessment of functional changes in the brain.<\/p>\n

What processes underlie neurodegeneration?<\/h2>\n

Before choosing diagnostic methods, doctors consider what mechanisms may be involved in the development of the disease. These include:<\/p>\n

\u2022 accumulation of pathological proteins (amyloid, tau, alpha-synuclein)
\u2022 mitochondrial damage
\u2022 chronic inflammation of nerve cells
\u2022 impaired blood supply to the brain
\u2022 genetic mutations<\/a>
\u2022 disruptions in intercellular communication<\/p>\n

It is important to understand that each neurodegenerative disease has its own \u201cmolecular signature.\u201d That is why the approach to diagnosis cannot be universal.<\/p>\n

How diagnostics begin: first level of assessment<\/h2>\n

In the early stages, symptoms are often subtle. Initial signs that require examination include:<\/p>\n

\u2022 slowed thinking and drowsiness
\u2022 decreased flexibility of thinking
\u2022 difficulty with orientation or word finding
\u2022 gait changes, muscle rigidity
\u2022 micromotor disorders
\u2022 decreased sense of smell (typical of Parkinson's disease, according to the Mayo Clinic)
\u2022 frequent mood swings or changes in behavior<\/p>\n

The patient may not notice this, but the doctor should assess how these changes affect daily functions.<\/p>\n

Biochemical markers: the key to early detection<\/h2>\n

In the last 10 years, laboratory indicators that reflect the state of nervous tissue have been actively integrated into diagnostics.<\/p>\n

Markers in the blood<\/h3>\n

The FDA notes their promise in the early detection of Alzheimer's disease and other forms of dementia. They are being studied:<\/p>\n

\u2022 NfL (neurofilaments light chain) \u2014 an indicator of neuronal destruction
\u2022 Amyloid proteins
\u2022 Phosphorylated tau protein<\/p>\n

The advantage of these tests is that they allow you to assess the progression of the condition without invasive procedures.<\/p>\n

Markers in cerebrospinal fluid<\/h3>\n

CSF gives a more accurate picture of early pathological changes:<\/p>\n

\u2022 reduction of amyloid \u03b242
\u2022 increase in total and phosphorylated tau
\u2022 changes in the tau\/amyloid ratio<\/p>\n

According to the Alzheimer's Association, these markers are the "gold standard" for confirming Alzheimer's disease.<\/p>\n

\"brain<\/h2>\n

Instrumental methods: how brain structure and function are assessed<\/h2>\n

Diagnosis is not limited to tests alone. Neuroimaging plays a significant role.<\/p>\n

Brain MRI<\/h3>\n

Allows you to evaluate:
\u2022 cortical atrophy
\u2022 hippocampal changes
\u2022 white matter damage
\u2022 consequences of microstrokes<\/p>\n

For Parkinson's disease, MRI helps rule out other causes of movement disorders.<\/p>\n

PET scan<\/h3>\n

PET with fluorine-labeled or amyloid markers helps detect the accumulation of pathological proteins.
According to the NIA, PET can confirm the presence of amyloid plaques even before symptoms appear.<\/p>\n

SPECT<\/h3>\n

Assesses blood flow in the brain, which makes it possible to differentiate types of dementia, including dementia with Lewy bodies.<\/p>\n

EEG<\/h3>\n

Shows the electrical activity of the brain. Used as an additional method when epileptic manifestations or changes in electrical activity are suspected in dementia.<\/p>\n

Cognitive protocols and neuropsychological tests<\/h2>\n

Diagnosis of neurodegenerative diseases necessarily includes an assessment of cognitive functions. In practice, the following are used:<\/p>\n

\u2022 MMSE
\u2022 MoCA
\u2022 FAB (fronto-orbitofrontal test)
\u2022 clock test
\u2022 assessment of executive functions<\/p>\n

These tests allow you to assess not only memory, but also speech, attention, logic, information processing speed, and behavioral reactions.<\/p>\n

Genetic tests: when are they needed?<\/h2>\n

In most patients, neurodegenerative diseases are not a direct result of mutations. However, genetic testing is recommended if:<\/p>\n

\u2022 there were early cases of dementia or Parkinson's in the family
\u2022 symptoms appeared before the age of 50
\u2022 Huntington's disease is suspected
\u2022 combined neurological and psychiatric symptoms are observed<\/p>\n

Genetic analysis helps determine the prognosis and choose an individualized surveillance program.<\/p>\n

Comparison of methods: what is used and when<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n\n
Method<\/th>\nUsing<\/th>\nAdvantages<\/th>\nLimitation<\/th>\n<\/tr>\n<\/thead>\n
MRI<\/td>\nstructural brain assessment<\/td>\nnon-invasiveness<\/td>\nmay not detect early changes<\/td>\n<\/tr>\n
PET<\/td>\namyloid, dopamine receptors<\/td>\nearly diagnosis<\/td>\nhigh cost<\/td>\n<\/tr>\n
CSF analysis<\/td>\nbrain biochemistry<\/td>\nhigh accuracy<\/td>\ninvasiveness<\/td>\n<\/tr>\n
NfL in the blood<\/td>\nearly changes<\/td>\nconvenience, dynamics<\/td>\ndoes not show localization<\/td>\n<\/tr>\n
Cognitive tests<\/td>\nbrain functions<\/td>\naccessibility<\/td>\ndependence on the level of education<\/td>\n<\/tr>\n
Genetic tests<\/a><\/td>\nhereditary forms<\/td>\nforecast<\/td>\ndoes not always explain symptoms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

A comprehensive approach allows you to get the most accurate picture.<\/p>\n

Why early diagnosis is critical<\/h2>\n

Neurodegenerative diseases cannot be completely cured, but their progression can be slowed. According to Mayo Clinic research, early detection of disorders allows for:<\/p>\n

\u2022 choose personalized treatment
\u2022 prevent rapid deterioration of cognitive functions
\u2022 reduce the risk of complications
\u2022 adapt lifestyle and minimize symptoms
\u2022 facilitate care and improve quality of life<\/p>\n

For some diseases (such as Parkinson's), early treatment provides a significantly better prognosis.<\/p>\n

FAQ: answers to frequently asked questions about diagnosing neurodegenerative diseases<\/h2>\n

Is it possible to detect neurodegenerative disease at a very early stage?<\/strong>
Yes, but only with a comprehensive examination. Biomarker tests (NfL, amyloid, tau) along with MRI or PET can show changes even before the onset of severe symptoms. This is confirmed by studies by the National Institute on Aging.<\/p>\n

Is an MRI alone sufficient to make a diagnosis?<\/strong>
No. MRI is important for assessing brain structure, but it does not detect molecular changes characteristic of Alzheimer's or Parkinson's disease. A complete diagnosis includes laboratory tests, cognitive evaluation, and sometimes PET scans.<\/p>\n

When can a doctor order a cerebrospinal fluid test?<\/strong>
This is done in cases where it is necessary to confirm Alzheimer's disease, clarify the type of dementia, or rule out other conditions. CSF allows for accurate measurement of beta-amyloid and tau protein levels.<\/p>\n

Is genetic testing mandatory?<\/strong>
No. Genetic testing is only indicated for patients with suspected hereditary forms of the disease, as well as those who have symptoms before the age of 50 or have a strong family history. Most cases of neurodegeneration are not associated with mutations.<\/p>\n

Can stress, trauma, or chronic illness "trigger" the neurodegenerative process?<\/strong>
They are not a direct cause, but they can accelerate the manifestation of latent disorders or worsen the course of existing disorders. According to the Mayo Clinic, chronic stress affects the brain structures responsible for memory.<\/p>\n

Are cognitive impairments always a sign of dementia?<\/strong>
No. They can be caused by depression, vitamin B12 deficiency, thyroid disorders, infections, or medication side effects. That's why it's important to get a lab test done before making a diagnosis.<\/p>\n

Is it necessary to repeat the diagnosis if the condition is stable?<\/strong>
Yes. Neurodegenerative diseases are progressive, so monitoring methods (NfL in the blood, cognitive tests, MRI every 1\u20132 years) help assess the dynamics and adjust treatment.<\/p>\n

How long does a full diagnosis take?<\/strong>
Depending on the methods: from a few days (analyses and tests) to two weeks if MRI, PET or genetic consultation is required. For complex cases, the process may be longer.<\/p>\n

Neurodegenerative diseases require a careful and consistent approach to diagnosis. Modern methods make it possible to see changes even before they begin to significantly affect the patient's life. The combination of laboratory indicators, instrumental studies and cognitive tests creates a complete picture, on the basis of which the doctor can choose an individual strategy of observation and therapy. Early diagnosis makes it possible to preserve brain functionality and maintain quality of life in the long term.<\/p>","protected":false},"excerpt":{"rendered":"

Neurodegenerative diseases are one of the most challenging problems in modern neurology. They develop slowly, affecting nerve cells and gradually impairing cognitive, motor, and cognitive functions.<\/p>","protected":false},"author":627,"featured_media":10986,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10984","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\n\u0414\u0456\u0430\u0433\u043d\u043e\u0441\u0442\u0438\u043a\u0430 \u043d\u0435\u0439\u0440\u043e\u0434\u0435\u0433\u0435\u043d\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u0438\u0445 \u0445\u0432\u043e\u0440\u043e\u0431: \u0441\u0443\u0447\u0430\u0441\u043d\u0438\u0439 \u043f\u0456\u0434\u0445\u0456\u0434<\/title>\n<meta name=\"description\" content=\"\u041c\u0435\u0442\u043e\u0434\u0438 \u0434\u0456\u0430\u0433\u043d\u043e\u0441\u0442\u0438\u043a\u0438 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