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Background AbobotulinumtoxinA has beneficial effects on spasticity and active movements in hemiparetic adults with upper limb spasticity (ULS). However, evidence-based information on optimal dosing for clinical use is limited. Objective To describe joint-specific dose effects of abobotulinumtoxinA in adults with ULS. Design Secondary analysis of a phase 3 study (NCT01313299). Setting Multicenter, international, double-blind, placebo-controlled clinical trial. Participants A total of 243 adults with ULS >6 months after stroke or traumatic brain injury, aged 52.8 (13.5) years and 64.3% male, randomized 1:1:1 to receive a single-injection cycle of placebo or abobotulinumtoxinA 500 U or 1000 U (total dose). Methods The overall effects of injected doses were assessed in the primary analysis, which showed improvement of angles of catch in finger, wrist, and elbow flexors and of active range of motion against these muscle groups. This secondary analysis was performed at each of the possible doses received by finger, wrist, and elbow flexors to establish possible dose effects. Main Outcome Measures Angle of arrest (X V1 ) and angle of catch (X V3 ) were assessed with the Tardieu Scale, and active range of motion (X A ). Results At each muscle group level (finger, wrist, and elbow flexors) improvements in all outcome measures assessed (X V1 , X V3 , X A ) were observed. In each muscle group, increases in abobotulinumtoxinA dose were associated with greater improvements in X V3 and X A , suggesting a dose-dependent effect. Conclusions Previous clinical trials have established the clinical efficacy of abobotulinumtoxinA by total dose only. The wide range of abobotulinumtoxinA doses per muscle groups used in this study allowed observation of dose-dependent improvements in spasticity and active movement. This information provides a basis for future abobotulinumtoxinA dosing recommendations for health care professionals based on treatment objectives and quantitative assessment of spasticity and active range of motion at individual joints. Level of Evidence I

Background OnabotulinumtoxinA is approved for the treatment of upper and lower limb spasticity in adults. Guidance on common postures and onabotulinumtoxinA injection paradigms for upper limb spasticity has been developed via a Delphi Panel; however, similar guidance for lower limb spasticity has not been established. Objective To define a clinically recommended treatment paradigm for the use of onabotulinumtoxinA for each common posture among patients with poststroke lower limb spasticity (PSLLS) and to identify the most common PSLLS aggregate postures. Design Clinical experts provided insight regarding onabotulinumtoxinA treatment for PSLLS using an adaptation of the Delphi consensus process. Setting Delphi panel. Participants Ten expert clinicians in neurology and physical medicine and rehabilitation who treat PSLLS. Methods A minimum of 2 rounds of anonymous voting occurred for each recommendation until consensus was reached (≥66% agreement). The first round was conducted via a survey; the second round was an in-person meeting. Main Outcome Measurements Reached consensus on muscle selection for injection, overall and per-muscle dose of onabotulinumtoxinA, number of injection sites/muscle, onabotulinumtoxinA dilution, and use of localization techniques. The most common PSLLS postures were reviewed. Recommendations were tailored toward injectors with less experience. Results Consensus was reached on targeted subsets of muscles for each posture. Doses ranged from 20 to 150 U for individual muscles and 50 to 300 U for limb postures. OnabotulinumtoxinA dilution 50 U/mL (2:1 ratio) was considered most appropriate but varied based on muscles selected (range, 2:1-4:1). Experts agreed that localization techniques for muscle identification during injection for all postures would be useful. For suboptimal response to injection, all panel members would increase the dose, and the majority (89%) would increase the number of treated muscles. The panel identified 3 common aggregating lower limb postures: (1) equinovarus foot and flexed toes; (2) extended knee and plantar flexed foot/ankle; and (3) plantar flexed foot/ankle and flexed toes. The recommended starting doses for each aggregate posture were 400 U, 400 U, and 300 U, respectively. Conclusion The modified Delphi panel process provided consensus on common muscles and corresponding onabotulinumtoxinA treatment paradigms for postures associated with PSLLS that can be used for guidance in optimizing care delivery. Level of Evidence V

Background OnabotulinumtoxinA reduces muscle hypertonia associated with poststroke spasticity (PSS). PSS manifests as several common postures. Objective To define treatment paradigms for PSS upper-limb common postures. Design Modified Delphi method. Setting Expert panel. Participants Ten injectors experienced in the treatment and clinical research of PSS (physiatrists and neurologists) were invited to participate in the Delphi panel. Methods The Delphi panel reviewed an electronic worksheet with PSS upper-limb postures to define onabotulinumtoxinA treatment paradigms (Round 1). During Round 2, panel members discussed in person Round 1 results and voted until consensus (≥66% agreement). Recommendations were geared toward those with new or early injection experience. Main Outcome Measurements Expert consensus on onabotulinumtoxinA treatment parameters for PSS including muscles to inject, dose per muscle and posture, and treatment adjustments for suboptimal response. Results For each posture, consensus was reached on targeted subsets of muscles. Doses ranged for individual muscles (10-100 U) and total doses per posture (50-200 U). An onabotulinumtoxinA dilution 50 U/mL (2:1 dilution ratio) was considered most appropriate; dilution ratios of 1:1 to 4:1 may be appropriate in some circumstances. The majority (89%) of panel members would increase the dose and/or the number of muscles treated for a suboptimal response to onabotulinumtoxinA. The panel identified 3 common aggregate upper-limb postures: (1) adducted shoulder + flexed elbow + pronated forearm + flexed wrist + clenched fist; (2) flexed elbow + pronated forearm + flexed wrist + clenched fist; and (3) flexed wrist + clenched fist. The recommended starting dose per aggregate was 300 U, 300 U, and 200 U, with a total maximum dose of 400 U, 400 U, and 300 U, respectively. Localization guidance techniques were considered essential for all postures. Conclusions Consensus on common muscles and onabotulinumtoxinA treatment paradigms for postures associated with upper-limb PSS was achieved via a modified Delphi method. The purpose of this analysis is to educate early onabotulinumtoxinA injectors rather than provide an evidence-based review. Level of Evidence V