abductor pollicis brevis origin and insertion

Abductor pollicis brevis: Origin, insertion and function | Kenhuband grab your definitive anatomy study guide for free! The abductor contaminates the long muscle: do you want to learn more about it? Our attractive videos, interactive questionnaires, in-depth articles and HD atlas are here to get the results faster. What do you prefer to learn with? "I would honestly say that Kenhub cut my study time in half. " - Kim Bengochea, University of Regis, Denver Long muscle tips Author: • Reviewer: Last revision: October 29, 2020 Reading time: 5 minutes The longus abductor pollen is a muscle found in the back compartment of the . It is one of the five , along with the , , and . Apart from the suppander, all the deep extender muscles extend from the forearm to the , crossing the joints and thus being able to act on them. The three polycitive muscles bind to the bones of the thumb, producing several within their joints. In addition to extending the hand in the radiocarpian joint, the abductor contaminates long muscle abducts and spreads the thumb in the . Key data on the abductor pollinates longus muscle Origin External surface of the proximal half of the radio, ulna and interosseo membrane Insertion Base of metacarpal bone 1, (rape bone) Measured Radiocarpal board: Hand extension; Carpometacarpal thumb joint: Tumb abduction and extension Innervation posterior interosseo nerve (C7, C8) Blood supply artery interosseosa anterior, arteria interosseosa posterior This article will discuss the function and function of polycitive abductor muscle longus. Origin and insertion Longus abductor contaminants come from the back surface of the proximal half of the interosseous membrane and intervening. The site of origin is just below the insertion of the . From here, the muscle courses inferolaterally to the radial side of the hand, becoming more superficial as they enter the distal third of the forearm. Only proximal to the wrist, the muscle throws a narrow tendon. This tendon passes through a groove carved on the side surface of the distal end of the radio, where it is joined by the tendon of the brevis muscle extender polyicis. The longus abductor pollen passes under the expansion retina. In doing so, it crosses the first dorsal compartment (extensive) of the retinacular space. Once inside the back of the hand, the tendon is divided into two slips that are inserted into the base of the first and the bones respectively. Some fibers can also be inserted into the surrounding structures; , and the fascia of eminence. The hand contains many muscles and is full of complicated anatomy. Help your learning about the muscles of the hand using Kenhub! Relations The muscle belly of the abductor contaminants is found in the distal half of the rear forearm. It is deep and lateral to extend polycitives long muscles, while its tendon is side by side to the brevis polyicis extender. The posterior interosseo and artery nerve course between the abductor polycifis longus and digitorum extender, passing above abductor polyciizes the surface of longus. The longus pulley binder tendon forms the lateral boundary of the . This is a triangular space that is found at the base of the thumb, distal and post-styled radio process. The anatomical mailbox is crossed by the neurovascular structures of the hand; the superficial branch of the , the and . The margins of this space are completed by longus polycid (medial) and brevis (lateral), while the soil is composed of scaphoid bones and trapeze. InnervationAbductor chickicis longus is inervated by the posterior interosseo nerve (C7, C8), which is a continuation of the deep branch of the radial nerve. The radial nerve is a branch of the posterior cord of the brachial plexus. Blood supply The blood supply to the abductor contaminates the longus muscle comes from the interosseous branches of the ;FunctionActivate alone or with the pollutants abductors brevis, the abductor polyicis longus removes the thumb from the palm. More specifically, it produces (mid-) thumb extension and abduction in the first. This action is seen in activities like bowls and shovels. Working with long and short thumb extenders, the muscle also helps to completely extend the thumb in the metacarpofalangeal joint. This action is important to loosen your hand, for example, when you let go of previously maintained objects. Longus abductor pollutants also help to kidnap the hand (radical deviation) in the radiocarpal joint. The abductor contaminates the long muscle: do you want to learn more about it? Our attractive videos, interactive questionnaires, in-depth articles and HD atlas are here to get the results faster. What do you prefer to learn with? "I would honestly say that Kenhub cut my study time in half. " - Kim Bengochea, University of Regis, Denver References:Illustrations: and grab your definitive anatomy study guide for free! Based on literature and academic research, validated by experts, and entrusted by more than 1 million users. Copyright © 2021 Kenhub. All rights reserved. Learning anatomy is not impossible. We're here to help. Learning anatomy is a massive company, and we are here to help you pass with flying colors.

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