Atlas of Human Anatomy (6th ed.). The three plantar interosseous muscles are unipennate, as opposed to the bipennate structure of dorsal interosseous muscles, and originate on a single metatarsal bone. Plantar interossei are the three fusiform, unipennate muscles, meaning that the fibers of each muscle are obliquely arranged and insert on one side of the tendon. The three plantar interosseous muscles are unipennate, as opposed to the bipennate structure of dorsal interosseous muscles, and originate on a single metatarsal bone. Plantar interossei are innervated by two branches of tibial nerve; the medial three muscles are supplied by the deep branch of lateral plantar nerve (S2-S3) while the most lateral plantar interosseous muscle (of the 4th interosseous space) is supplied by the superficial branch of this nerve. Gray's anatomy (42nd ed.). Plantar interossei are located superficial to dorsal interossei and deep to muscles of the third layer of the sole; flexor hallucis brevis, adductor hallucis and flexor digiti minimi brevis. • Grounded on academic literature and research, validated by experts, and trusted by more than 1 million users. One example is Charcot-Marie-Tooth disease, which is a hereditary sensorimotor neuropathy that affects the peripheral nervous system. Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. and grab your free ultimate anatomy study guide! Reading time: 4 minutes. As the foot muscles can be divided either from lateral to medial into three groups or from superficial to deep into four layers, plantar interossei can be classified in two ways: Plantar interossei are invested by the plantar interosseous fascia and accompanied by the dorsal interossei muscles. [1], Since the intersseous muscles cross on the metatarsophalangeal joint, then they act on that specific joint and cause adduction of toes III, IV, and V.[1], Adduction itself is not of extreme importance to the toes, but these muscles work together with the dorsal interosseous muscles in flexion of the foot. Register now The muscles cross the metatarsophalangeal joint of toes III-V so the insertions correspond with the origin and there is no crossing between toes. Netter, F. (2014). Read more. – Philadelphia: LippincottWilliams&Wilkins. 2020 Ventricles, meninges and blood vessels of the brain, Medial bases of proximal phalanges and extensor expansion of digits 3-5, Alternatively, they can be discussed as part of the. Loss of function of the plantar (and dorsal) interossei will result in unopposed flexion of the toes. These activities are important during the push-off phase of running or walking as they maintain the position of 3rd to 5th toes and prevent them from thrusting apart once the body weight is applied to the forefoot. Anatomy and human movement (6th ed.). This article will discuss the anatomy and function of plantar interossei muscles of the foot. Plantar interossei are a group of three small muscles found in the central compartment of the sole of the foot. Standring, S., & Gray, H. (2008). Edinburgh: Churchill Livingstone. Plantar interossei muscles: want to learn more about it? After passing deep to the deep transverse metatarsal ligament, the tendon of each muscle inserts to the medial base of proximal phalanx and extensor expansion of the corresponding toe. “I would honestly say that Kenhub cut my study time in half.” Clinically oriented anatomy (5th ed.). [1], All three plantar interosseous muscles are innervated by the lateral plantar nerve. The plantar interossei have a unipennate morphology, while the dorsal interossei are bipennate. Bones of the right foot. Moore, K., Agur, A., & Dalley, A. The muscles cross the metatarsophalangeal joint of toes III-V so the insertions correspond with the origin and there is no crossing between toes. The plantar and dorsal interossei comprise the fourth and final plantar muscle layer. The muscle fibers course anteriorly, crossing the medial aspect of metatarsophalangeal joint to give off a tendon at the level of the head of respective metatarsal bone. The three muscles originate on the medial aspect of metatarsals III-V. Get started by looking at the different muscle groups within the foot with the learning materials below. Plantar interossei are smaller than their dorsal counterparts and lie below the metatarsal bones. In human anatomy, plantar interossei muscles are three muscles located between the metatarsal bones in the foot. Kenhub. Palastanga, N., & Soames, R. (2012). The three muscles originate on the medial aspect of metatarsals III-V. This article incorporates text in the public domain from page 495 of the 20th edition of Gray's Anatomy (1918), Three muscles located between the metatarsal bones in the foot, https://en.wikipedia.org/w/index.php?title=Plantar_interossei_muscles&oldid=984535416, Wikipedia articles incorporating text from the 20th edition of Gray's Anatomy (1918), Creative Commons Attribution-ShareAlike License, This page was last edited on 20 October 2020, at 16:18.