deep branch of lateral plantar nerve deep branch of lateral plantar nerve the deep branch of lateral plantar nerve (muscular branch) accompanies the lateral plantar artery on the deep surface of the tendons of the flexor muscles and the adductor hallucis, and supplies all the interossei (except those in the fourth metatarsal space), the second, third, and fourth lumbricales. deep branch of lateral plantar nervethe plantar nerves.detailsidentifierslatinramus profundus nervi plantaris lateralista98a14.2.07.073ta26597fma44764anatomical terms of neuroanatomy