🧠 Vet’s 2025 Guide to Neurological Problems in Horses
By Dr Duncan Houston BVSc
1. Overview & Why It Matters
Neurological diseases in horses vary from infection and trauma to genetic or toxic causes. Early recognition is vital—many conditions progress, and misdiagnosis can risk both the horse’s life and human safety. Common signs include ataxia, behavioral changes, muscle atrophy, head-pressing, circling, and seizures :contentReference[oaicite:3]{index=3}.
2. Infectious & Inflammatory Causes
- Encephalitis (EEE, WEE, VEE, WNV): mosquito-borne viruses causing fever, disorientation, circling, paralysis—vaccination and mosquito control are key :contentReference[oaicite:4]{index=4}.
- Rabies: zoonotic, fatal; symptoms include aggression, ataxia, self-mutilation :contentReference[oaicite:5]{index=5}.
- Tetanus/Botulism: bacteria from soil or moldy hay can attack the nervous system :contentReference[oaicite:6]{index=6}.
3. Protozoal Diseases
Equine Protozoal Myeloencephalitis (EPM): caused by *Sarcocystis neurona* or *Neospora*. Horses ingest opossum feces, and chronic infection causes ataxia, muscle weakness, asymmetry. Diagnosis uses neuro exam plus serum/CSF testing; treatments include ponazuril, sulfadiazine-pyrimethamine :contentReference[oaicite:7]{index=7}.
4. Traumatic & Torque-Related Injuries
Traumatic brain injury: from kicks, falls, trailer accidents—signs include seizures, unequal pupils, sudden blindness. Diagnostics include CT/MRI, radiographs :contentReference[oaicite:8]{index=8}.
Wobbler Syndrome (Cervical Vertebral Myelopathy): spinal cord compression in the neck causing hind-end ataxia, weakness. Diagnosed via x-rays, myelography, MRI :contentReference[oaicite:9]{index=9}.
5. Neurodegenerative & Genetic Conditions
- Cerebellar Abiotrophy: brain degeneration in foals (Arabians etc), with intention tremor and pronounced gait deficits :contentReference[oaicite:10]{index=10}.
- Shivers: progressive hindlimb tremor when backing; no cure, occasional corticosteroids/vitamin E help :contentReference[oaicite:11]{index=11}.
- Stringhalt: exaggerated hind-leg flexion, often pasture-related; some respond to tenectomy or phenytoin, others resolve with pasture change :contentReference[oaicite:12]{index=12}.
6. Cranial or Peripheral Nerve Disorders
Facial nerve paralysis: drooping eyelid/lip due to trauma, guttural pouch infections, anesthesia pressure. Treatment may include steroids, acupuncture, laser therapy :contentReference[oaicite:13]{index=13}.
7. Other Neurological Syndromes
- Headshaking Syndrome: trigeminal nerve hyper-excitability causing uncontrollable head movements; managed symptomatically :contentReference[oaicite:14]{index=14}.
- Borna Disease: European virus causing ataxia, behavior change; rare, hard to confirm ante-mortem :contentReference[oaicite:15]{index=15}.
8. Diagnosis Strategy
- Thorough neurological exam—assess gait, cranial nerves, posture, reflexes.
- Bloodwork and CSF analysis help differentiate infection vs inflammation.
- Imaging (radiographs, CT, MRI, myelography) localizes structural damage.
- Genetic testing for cerebellar abiotrophy; pasture history for toxin-related stringhalt.
9. Treatment & Management
- Infections: supportive care, NSAIDs, antivirals, vitamin E, slings.
- EPM: antiprotozoals + anti-inflammatories + rehab.
- Wobbler: surgical stabilization or corticosteroids and restricted exercise.
- Genetic/neurodegenerative: supportive only—focus on quality of life.
- Trauma: emergency stabilization, neuroprotective IV fluids, ICP management.
10. Rehabilitation & Prognosis
Recovery success depends on disease cause and severity. Neurodegenerative and congenital cases often have poor prognosis. Others, like mild trauma, EPM, or post-surgery wobblers, can return to use with care and rehab.
11. Prevention & Monitoring
- Vaccinations: rabies, encephalitis, WNV.
- Pasture management to reduce protozoal and plant toxin risks.
- Safe environments to prevent trauma.
- Genetic screening for breeding decisions.
12. Ask A Vet Integration 🩺
Through Ask A Vet, owners and managers can:
- Share videos/photos of gait or headshaking for rapid triage.
- Get protocol guidance: neuro exams, blood/CSF testing, imaging choices.
- Receive rehabilitation plans, nutritional strategies, and medication reminders.
- Track disease progression with video logs and follow‑up consults.
Download the Ask A Vet app today to access expert neurological insights and early intervention protocols through 2025 and beyond! ❤️
13. Summary Table
| Condition | Signs | Treatment | Prognosis |
|---|---|---|---|
| EPM | Ataxia, asymmetry | Antiprotozoals + anti-inflammatories | Guarded–good if early |
| Wobbler | Hindlimb weakness, neck stiffness | Surgery or steroids | Guarded to fair |
| Cerebellar Abiotrophy | Head tremor, coordination loss | Supportive | Poor–progressive |
| Headshaking | Trigeminal-triggered shaking | Symptom management | Variable |
| Trauma/TBI | Seizures, unequal pupils | Supportive, neuro care | Depends on severity |
14. Final Thoughts
Neurological diseases in horses present complex challenges—but with awareness, early veterinary care, and tailored rehab, many horses can return to a meaningful quality of life. Combining field vet support with Ask A Vet's telehealth expertise ensures swift intervention and guided recovery from 2025 and beyond. 🧠❤️
This article is general veterinary education and does not diagnose or treat an individual animal. Always confirm medication names, doses and interactions with the veterinarian who knows your pet.
If your animal is struggling to breathe, collapsed, bleeding heavily, seizing, or has eaten something toxic, contact your vet or the nearest emergency clinic now.
Animal Poisons Helpline (AU) 1300 869 738 · Animal Poisons Helpline (NZ) 0800 869 738 · ASPCA Animal Poison Control (US) (888) 426-4435
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Ask A Vet articles are written by Dr Duncan Houston BVSc, a practising veterinarian, unless another author is named in the byline.
