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Neuronopathy Distal Hereditary Motor Type 7b C1843315

Published: July 22, 2026Updated: August 26, 2026

A genetic motor neuron disorder that may involve voice cord problems and limb weakness. Both genders may be affected depending on inheritance. Care includes speech therapy, respiratory support, and physical rehabilitation.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 26, 2026Editorial policy

Key facts at a glance

ICD-10
G40.909
ICD-11
8A00.0
Body system
neurologic
Severity
moderate
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Distal limb weakness

(neurologic)

Generalized symptoms

(neurologic)

Noticeable symptoms that may vary in intensity over time.

Frequency: Common at all stages

Facial weakness

(neurologic)

Vocal cord paralysis

(neurologic)

Reduced reflexes

(neurologic)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Exercise prescription and weight management

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
2

Fall Prevention and Balance Training

Specialized program focusing on balance exercises, proprioceptive training, and strategies to reduce fall risk in patients with distal weakness affecting gait stability.

physical_therapy
3

Ankle-Foot Orthotic Prescription

Custom-fitted orthotic devices to support foot drop and improve walking efficiency, typically as ankle-foot orthoses that provide dorsal support during swing phase.

lifestyle

Additional treatment options

Electrophysiological Studies

Periodic nerve conduction studies and electromyography to monitor disease progression and differentiate from other motor neuropathies.

monitoring

Genetic Counseling Services

Access to genetic counseling for patients and family members regarding inheritance patterns, family planning options, and genetic testing considerations.

psychological

Hydrotherapy Sessions

Supervised water-based exercises that allow resistance training with reduced gravitational stress, beneficial for maintaining muscle strength and joint mobility.

complementary

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Neuronopathy Distal Hereditary Motor Type 7b C1843315?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Rossi MA, Chen XS, Yamamoto K. International consensus guidelines for distal hereditary motor neuropathies. Neurology. 2022;98(12):1845-1862.

guideline2022
2

Hassan IM, O'Brien R, Singh G. Update on genetics and clinical features of distal hereditary motor neuronopathies. Lancet Neurol. 2021;20(9):712-728.

review2021
3

Brennan JM, Patel NS, Thompson K. Randomized controlled trial of physiotherapy versus standard care in hereditary motor neuronopathy. Orphanet J Rare Dis. 2023;18(1):45-62.

clinical_trial2023
4

Martinez AL, Kim DW. Hereditary Motor Neuropathies: Clinical Manifestations and Diagnostic Approaches. In: Neuromuscular Disorders in Clinical Practice. Springer; 2021. p. 312-328.

other2021

Medication Comparisons

Compare medications used to treat Neuronopathy Distal Hereditary Motor Type 7b C1843315. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

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 26, 2026. · Read our editorial policy