 scissor gait is caused by spasticity of the hip adductor muscles while tip-toeing gait is caused by spasticity of the gastrocnemius-soleus muscle complex or calf musculature.Also, following an upper motor neuron lesion, there may be multiple muscles affected, to varying degrees, depending on the location and severity of the upper motor neuron damage.The result for the affected individual, is that they may have any degree of impairment, ranging from a mild to a severe movement disorder.