Management of Upper Motor Neuron Spasticity
Botulinum toxin is the first-line treatment for focal spasticity that is painful, impairs function, reduces rehabilitation participation, or compromises positioning or skin care, and should be offered to all appropriate patients 1, 2.
Treatment Algorithm by Spasticity Distribution
Focal Spasticity (1-2 muscle groups)
Botulinum toxin injections are the definitive treatment:
- All FDA-approved formulations (AboBoNT-A, IncoBoNT-A, OnaBoNT-A) are equally effective for upper extremity spasticity and should be offered 2
- RimaBoNT-B is probably effective and should be considered 2
- These agents reduce muscle tone, improve passive function (range of motion), and are safe 2
- The 2025 VA/DoD stroke guidelines provide a strong recommendation for botulinum toxin in focal spasticity 1, which is the highest strength recommendation in the evidence provided
- Combine with physiotherapy for optimal functional outcomes 3, 4
Important caveat: While botulinum toxin improves passive function reliably, evidence for active function improvement remains insufficient 2. Set realistic patient expectations accordingly.
Severe Chronic Lower Extremity Spasticity
Intrathecal baclofen via programmable pump when other interventions fail 1, 5:
- Particularly effective for generalized lower extremity spasticity
- Reduces need for oral antispasticity medications
- Requires surgical implantation but provides sustained benefit
Generalized or Refractory Spasticity
Oral medications (baclofen, tizanidine):
- Limited efficacy with considerable side effects 5
- Use only when focal treatments are insufficient
- Note: OnaBoNT-A was superior to tizanidine in head-to-head comparison 2
Adjunctive Physical Interventions
Always incorporate physiotherapy or exercise 5:
- Serial casting for contracture prevention
- Strengthening and endurance training to address negative signs of upper motor neuron syndrome 4
- Body weight-supported treadmill training for lower extremity involvement 4
Functional electrical stimulation or ankle-foot orthoses for foot drop (equally effective) 1
Insufficient Evidence - Do Not Routinely Offer
The following lack adequate evidence and should not be standard practice 1:
- Acupuncture or dry needling
- Whole body or localized muscle vibration
- Extracorporeal shock wave therapy
Surgical Options for Intractable Cases
When conservative management fails:
- Hyperselective neurectomy for upper limb spasticity shows promise with spasticity reduction while preserving strength 6, 7
- Cervical dorsal rhizotomy for upper limb involvement 8
- Muscle transfers, lengthening procedures, or selective dorsal root rhizotomy (primarily pediatric) 3
- Tendon lengthening, myotomy, or periarticular soft tissue release for fixed contractures 7
Critical Assessment Points
Before initiating treatment, identify:
- Trigger factors (infection, skin breakdown, pain) - treat these first as they can worsen spasticity 3
- Whether hypertonia is from spasticity (neural) versus passive stiffness from connective tissue changes - the latter requires physical rather than pharmacological intervention 3
- Patient-specific goals: improved hygiene, reduced pain, enhanced active function, or better positioning 9
- Distribution: focal versus generalized 3
- Presence or absence of volitional control - this fundamentally changes surgical planning 7
Common Pitfall
Do not manage spasticity in isolation - addressing positive signs (hyperreflexia, clonus) without addressing negative signs (weakness, loss of postural control) through rehabilitation will not produce functional improvement 4. Spasticity reduction alone does not equal functional gain.