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Motor Neuron Pathology Panel (Neurofilament Light Chain and Related Biomarkers)

Published: August 9, 2026Updated: August 16, 2026

This test measures proteins linked to nerve cell damage, often used to assess conditions affecting the nervous system.

Quick summary

["Helps diagnose or monitor nerve-related disorders by detecting specific biomarkers in your blood."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
98678-6
Short code
Motor NC Pnl L ulnar n
Synonyms
Motor NC Pnl L ulnar n
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

This panel includes measurements of neurofilament light chain (NfL), a protein found in nerve cells. Elevated levels may indicate nerve damage or disease progression, such as in multiple sclerosis, spinal cord injuries, or neurodegenerative conditions. Additional biomarkers may be included depending on clinical indication.

How the Test Works

Blood is drawn and analyzed using advanced immunoassay techniques to detect and quantify these proteins. The results help healthcare providers assess the extent of nerve cell involvement.

Common Uses

This test is typically ordered to evaluate suspected nerve damage, monitor disease progression in conditions like multiple sclerosis or amyotrophic lateral sclerosis (ALS), or investigate symptoms such as weakness, numbness, or cognitive decline.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the blood draw if instructed by your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Neurofilament & Biomarker Panel

Frequently asked questions

Why might my doctor order this test?
Your doctor may recommend this test if you have symptoms like muscle weakness, nerve pain, or cognitive changes that suggest nerve damage. It can also help track disease activity in conditions like multiple sclerosis or ALS.
What do my results mean?
Results above normal levels may suggest nerve cell damage, but they don’t always confirm a specific diagnosis. Your doctor will interpret results in the context of your symptoms and medical history.
Can this test replace other diagnostic tests?
No, this test is one tool among many. It may be used alongside imaging, physical exams, or other tests to provide a full picture of your condition.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy