23/09/2026
A great read on setting realistic rehabilitation and prognostic expectations following peripheral nerve injury!
Recovery after nerve injury can vary widely depending on the severity and type of damage, with some injuries taking months to regenerate and recover function.
This is an important reminder that rehabilitation progress may take time, and early lack of function doesn’t necessarily mean further recovery isn’t possible. 🐾
Scientific Wednesday 🔬
How long does an injured nerve need to recover?
There is no single timeline following traumatic peripheral nerve injury. A major factor is the severity of the nerve damage.
With neuropraxia, the axon remains intact. Remyelination may take approximately 3-6 weeks, with functional recovery often possible within around 3 months.
With axonotmesis, the axon itself is damaged. Axons need to regenerate, reach their target tissue and achieve functional reinnervation. Recovery can therefore extend over many months.
Neurotmesis represents much more severe structural disruption, with substantially more limited potential for spontaneous functional recovery.
This distinction matters in rehabilitation: lack of normal function after several weeks does not necessarily mean that further recovery is impossible following an axonal injury.
A recent veterinary study of 38 dogs and 10 cats with sciatic nerve injuries further demonstrates how variable traumatic and iatrogenic nerve injuries can be and highlights the value of motor function and electrodiagnostics when assessing prognosis.
Rehabilitation can accompany this prolonged biological process, supporting function while aiming to limit secondary consequences of denervation and immobility.
Nerve regeneration takes time. Our rehabilitation and prognostic expectations need to respect that biology.
References:
Dell'Apa, Diletta, et al. "Traumatic and iatrogenic sciatic nerve injury in 38 dogs and 10 cats: Clinical and electrodiagnostic findings." Journal of Veterinary Internal Medicine 38.3 (2024): 1626-1638.
Dell’Apa D et al. Traumatic and iatrogenic sciatic nerve injury in 38 dogs and 10 cats. J Vet Intern Med. 2024;38:1626–1638.