Peripheral spinal nerve damage is often the cause of leg paralysis. This can have a spiral effect, causing secondary damage, pain, and loss of nerve connection to the muscles, leading them to wither. Conditions that can affect the nerves and cause paralysis include injuries, infections, muscle or spinal conditions, or severe toxic exposures to certain chemicals. Paralysis can be partial or full, affecting one or all four legs. While some conditions can be remedied through surgery, others may not be able to be treated and will require supportive, lifelong care as the limb will not be functional.
Leg paralysis in dogs occurs when one or more legs lose the ability to function. Often seen as limping or dragging of the limb in dogs, it can point to nerve or muscular damage. This can lead to destruction of the nerve sheaths, tissue decay, joint and muscle damage, or atrophy as the affected dog loses the ability to flex or move that limb.
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Symptoms of leg paralysis in dogs include:
Types
Conditions that can cause leg paralysis can include:
Cases of leg paralysis can offer a myriad of causes, and your veterinarian will take into consideration many factors when coming to a positive diagnosis of this condition. Observations including your dog’s gait and posture, any pain present, conditions of muscles in the affected limb, and spinal reflexes can help to locate the source of injury. Recovery is better the closer the associated nerve damage is to the muscle. Your veterinarian will also look at how well your dog can flex an associated joint, reflexes in other places in the leg, and how well he can bear weight on that limb. Electrical stimulation can be used to see if the nerve is still intact.
Information that can help guide your veterinarian to a correct diagnosis of the cause of the paralysis can include any signs noticed, exposure to pesticides or insecticides, exposure to other animals, exposure to tick ridden areas, and medical history. Other tests that can provide valuable information include CT scans, MRIs, X-rays, myelography, surgical biopsies, blood tests, cerebrospinal fluid tests, tissue samples, physical examination, and the visible presence of a tick or skin crater.
Treatment of leg paralysis is often targeted at the underlying cause. Many joint and muscle issues can be remedied through surgery and supportive care. When the cause is nerve related, recovery will depend on the nerve sheath condition and the distance between the injury and where the nerve ends. While some nerve damage can resolve over many weeks or months, more severe cases can require surgical reattachment. A light bandage is often applied to the affected limb during recovery, and a sling can be added to prevent the leg from dragging. Supplementary care includes giving your dog massages, applying heat and stretching the tendons to keep them healthy while the nerve regenerates. Acupuncture may be prescribed.
In the case of tumors, surgery might be used for removal. Nerve sheath tumors can affect many nerves at once, and can be more difficult to remove. Recovery for this type of tumor is poor.
Viral diseases have no treatment, and recovery is poor in affected animals. Fungal infections can be difficult to treat, and recovery might be uncertain. Very severe cases of tick toxicity can call for artificial ventilation. Treatment involves tick removal and antibiotics, and recovery is often good.
With granulomatous meningoencephalo-myelitis, dogs can temporarily improve with drug therapies, but long term recovery is guarded. There are no treatments for degenerative myelopathy, and often supportive care is all that can be done. This is through physical rehabilitation, pressure sore prevention, monitoring for conditions like urinary infections, and creating an increased mobility with harnesses and carts.
In some cases, amputation of the paralyzed leg may be recommended. Many three-legged dogs can live happy and functional lives.
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