A method for treating an abnormality of the first metatarsophalangeal joint of the foot of a mammal includes electrically stimulating a site on each of the extensor hallucis brevis and adductor hallucis muscles of a foot of the mammal affected by the abnormality, and visually confirming that the stimulated muscles responds to the stimulation by contracting. An amount of botulinum toxin effective to treat the abnormality is then injected to the confirmed sites on the extensor hallucis brevis and the adductor hallucis muscles of the affected foot.
