Botulinum toxin type A (BtxA) injection and modified constraint-induced movement therapy (mCIMT) are both promising approaches to enhance recovery after stroke. However, the combined application of the two modalities has rarely been studied. The aim was to investigate whether combined BtxA and mCIMT would produce greater improvements in spasticity and upper extremity function than BtxA plus conventional rehabilitation in chronic stroke patients with upper extremity spasticity.