Plantar metatarsal arteries run parallel to the medial borders of plantar interossei. 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. Singh, V. (2010). Edinburgh: Churchill Livingstone. They lie on the palmar surface of the hand and along with the dorsal interossei muscles occupy the spaces between the metacarpal bones. INSERTION. Abduct from axis of middle finger. Copyright © 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. Clinically Oriented Anatomy (7th ed.). In African apes, adductor pollicis is notably well-developed, with an origin on the carpus and its ligaments, and an insertion that has migrated distally, in some cases as far as the distal phalanx. Atlas of Human Anatomy (6th ed.). A pennate muscle is a muscle that attaches obliquely to its tendon. Plantar interossei muscles: want to learn more about it? The blood supply of the plantar interossei arises from the posterior tibial artery, via lateral plantar artery and its branches; deep plantar arch, plantar metatarsal and dorsal metatarsal arteries. Read more. Origins and insertions ... With some individual variations, the interossei muscles are attached either proximally or distally on the extensor expansion. Study Flashcards On Anatomy of the Dog: Muscle Origins and Insertions at Cram.com. There are 20 intrinsic muscles in hand. Origin: Dorsal 1 - 4: Adjacent sides of two metacarpals (bipennate muscles) Insertion: Dorsal 1 - 4: Extensor expansions and bases of proximal phalanges of digits 2 - 4 Action: Dorsal 1 - 4: Abduct digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints Innervation: Deep branch of ulnar nerve (C8 and T1) Anatomy and human movement (6th ed.). Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster. Functionally, the palmar interossei are antagonists to the dorsal interossei in the metacarpophalangeal joint. Specifically, the 1st palmar interosseous pulls the index finger medially, whereas the 2nd and 3rd pull the ring and little fingers laterally. • Check out the following study unit to jog your memory! There are some denervation syndromes that should be considered when this deformity is seen. 3rd DI origins from the adjacent sides of 3rd and 4th metacarpals. Origin and insertion 1st palmar interosseous: when present, it arises on the ulnar side of the base of the 1st metacarpal bone. The main function of palmar interossei is to adduct the fingers in a longitudinal axis, which means the movement of the fingers towards the middle finger. Edinburgh: Elsevier Churchill Livingstone. and grab your free ultimate anatomy study guide! Do you want a method that prevents you from mixing up the functions of the interossei muscles? Palmar interossei consist of four muscles that attach to the 1st, 2nd, 4th and 5th finger, of which the one on the 1st finger is sometimes rudimentary. Loss of function of the plantar (and dorsal) interossei will result in unopposed flexion of the toes. There are a lot of structures to learn in foot anatomy. and grab your free ultimate anatomy study guide! Dimitrios Mytilinaios MD, PhD Attachment of the Dorsal Interossei Muscles Origin: Dors… Plantar interossei have three main actions; they flex and adduct the 3rd, 4th and 5th at the metatarsophalangeal joints and extend the 2nd to 4t toes at the interphalangeal joints.