The Dorsal Interossei muscles of the hand are all supplied by the deep branch of the ulnar nerve (C8, T1) [1]. Dorsal 1 – 4: Abduct digits from axial line and act with lumbricals to flex … All rights reserved. Nerve supply Cutaneous ... adductor hallucis, and the dorsal and plantar interossei. Gray's anatomy for students. Function of the Dorsal Interossei Muscles Palastanga N, Field D, Soames R. Anatomy and human movement. On the first and second digit, the muscle lies on the lateral side and in the third and fourth digit, it lies off the medial side. dorsal interossei (nerve supply) All are supplied by the deep branch of the ulnar nerve (root value T1). 1173185. Physiopedia articles are best used to find the original sources of information (see the references list at the bottom of the article). In the hand there are four dorsal Interossei which lie superficially, inbetween the metacarpals on the dorsum of the hand. On the first and second digit the muscle lies on the lateral sid… The innervation of all dorsal interossei is carried by the deep branch of ulnar nerve, derived from nerve roots C8 and T1. Sign up to receive the latest Physiopedia news, The content on or accessible through Physiopedia is for informational purposes only. When refering to evidence in academic writing, you should always try to reference the primary (original) source. The position of the insertion site is dependent on which digit is involved. Blood supply. Each muscle is bipennate in shape and extends from the proximal ends of adjacent metacarpals to the proximal phalanx and dorsal digital expansion of the appropriate finger. Origin: Dorsal 1 – 4: Adjacent sides of two metacarpals (bipennate muscles) The first digit and the fifth digit have their own abductor muscles in the thenar and hypothenar eminence and so do not have interossei musculature [2]. Read more, © Physiopedia 2020 | Physiopedia is a registered charity in the UK, no. The first dorsal interosseous muscle can be tested by placing the patient's palm flat on a table and asking the patient to abduct his/her index finger against the examiner's resistance. Top Contributors - Kate Sampson, Olajumoke Ogunleye, Kim Jackson, Tomer Yona and Joao Costa, In the hand, there are four dorsal Interossei which lie superficially, in between the metacarpals on the dorsum of the hand. Attachment of the Dorsal Interossei Muscles The dorsal interossei muscles can be palpated in the dorsum of the hand on resisted abduction of the fingers between the metacarpals[1]. Origin: Originates from the sides of metatarsals one to five. Dorsal 1 – 4: Dorsal and palmar metacarpal arteries. Deep branch of ulnar nerve (C8 and T1), Blood Supply of the Dorsal Interossei Muscles The dorsal interossei are four muscles in the back of the hand that performs to abduct the index, middle, and ring fingers and assists in flexion at the metacarpophalangeal joints and extension at the interphalangeal joints of the middle, index and ring fingers. Dorsal interossei muscles of the hand- Human anatomy. 5th ed. How To Protect Your Eyes From Electronics Devices? The dorsal interossei muscles are muscles that abduct the second, third and fourth digits. Nerve Supply: Ulnar nerve. - Nerve supply: palmar branch of the Ulnar nerve, C8, T1 - Synergists: lumbrical, Palmar Interossei, Flexor Digitorum Profundus, Flexor Digitorum Superficialis - First Dorsal Interosseous: - largest of the interossei; - origin: inner borders of first and second metacarpals; - passes dorsal to adductor pollicis; The position of the insertion site is dependent on which digit is involved. The sknin overlying the muscle is supplied by roots C6, 7 , 8. Dorsal Interossei: Dorsal interossei are four muscles in the back of the hand that work to abduct the index, middle, and ring fingers apart from hand’s midline and assists in flexion at the metacarpophalangeal joints and extension through the interphalangeal joints of the index, middle and the ring fingers. The medial plantar nerve from the tibial nerve provides sensory innervation to the skin of the medial side of the sole, the skin of the medial three and a half toes, and the nail beds of these toes. The 1st dorsal interosseous muscle receives vascular supply from the first dorsal metacarpal branch of the radial artery. How Many Ounces in a Gallon ? They are specified as 'dorsal' to contrast them with the palmar interossei, which are located on the anterior side of the metacarpals. The skin that overlies the muscles is supplied by the roots C6-C8. There are four dorsal interossei in each hand. Dorsal interossei: Dorsal interossei of the foot are four muscles situated between the metatarsal bones. Assist lumbricals in extending interphalangeal joints while flexing metatarsal phalangeal joints : NERVE The dorsal interossei are four muscles in the back of the hand that performs to abduct the index, middle, and ring fingers and assists in flexion at the metacarpophalangeal joints and extension at the interphalangeal joints of the middle, index and ring fingers. KenHub. The Dorsal Interossei muscles of the hand are supplied by the dorsal and palmar interossei artery [1]. Origin: Available from: I give my consent to Physiopedia to be in touch with me via email using the information I have provided in this form for the purpose of news, updates and marketing. Dorsal 1 – 4: Abduct digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints. [1], The medial side of the proximal end of the first metacarpal and lateral side of the second metacarpal. Each arises from two metatarsals. Dorsal interossei: Origin, Insertion, Action & Nerve Supply. Insertion: Dorsal 1 – 4: Extensor expansions and bases of proximal phalanges of digits 2 – 4, Nerve Supply of the Dorsal Interossei Muscles The muscle belly can be both seen and palpated and is a reliable test for the ulnar nerve. Drake RL, Vogl W, Mitchell AWM. Each muscle is bipennate in shape and extends from the proximal ends of adjacent metacarpals to the proximal phalanx and dorsal digital expansion of the appropriate finger. – Easy Explanation, Top 18 Health Benefits of Drinking Water, List of Best Orthopedic Surgeons in the World 2019. Copyright © 2016 - 2019 How To Relief. In most cases Physiopedia articles are a secondary source and so should not be used as references. Structure and function. If you believe that this Physiopedia article is the primary source for the information you are refering to, you can use the button below to access a related citation statement. Physiopedia is not a substitute for professional advice or expert medical services from a qualified healthcare provider. London: Butterworth Heinemann Elsevier, 2006. As the dorsal interossei muscles attach to the extensor expansion (extensor hood) of the digits, it also assists in addition to the lumbricals in producing flexion and extension of the metacarpophalangeal and interphalangeal joints [2]. Insertion: The first muscle connects to the medial side of the proximal phalanx of the second digit. https://www.youtube.com/watch?v=cn1Vp9FawKI, https://www.physio-pedia.com/index.php?title=Dorsal_Interossei_of_the_Hand&oldid=259243, Lateral side of the base of the second proximal phalanx and the extensor expansion (Extensor Hood), Medial side of the second metacarpal and lateral side of the third metacarpal, Lateral side of the base of the third proximal phalanx and the extensor expansion, Medial side of the third metacarpal and lateral side of the fourth metacarpal, Medial side of the base of the third proximal phalanx and the extensor expansion, Medial side of the fourth metacarpal and lateral side of the fifth metacarpal, Medial side of the base of the fourth proximal phalanx and the extensor expansion. London: Churchill Livingstone. Dorsal Interossei Muscles : Origin, Insertion, Action & Nerve Supply. That is usually the journal article where the information was first stated. Bases of proximal phalanges and dorsal extensor expansions of medial side of 2nd toe and lateral sides of 2nd , 3rd and 4th toes : ACTION Abduct 2nd , 3rd and 4th toes from axis of 2nd toe.