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Anterior Forearm Essay

1078 words - 4 pages

Buño, Kathrina V. September 22, 20141A, Table 20SGD 7: ANTERIOR FOREARM AND PALM OF THE HANDDiscuss the muscles of the anterior compartment of the forearm.The muscles of the forearm are divided into three layers. The superficial, intermediate and deep layers. Each layer consists different muscles of the forearm, namely:Superficial LayerPronator TeresPalmaris longusFlexor Carpi Radialis (most medial)Fexor Carpi Ulnaris (most lateral)Intermediate LayerFlexor digitorum SuperficialisDeep LayerFlexor Digitorum ProfundusFlexor Pollicis LongusPronator QuadratusThe muscles of the forearm have a common tendon o origin which is the medial epicondyle. Most of the muscles are innervated by the median nerve and is supplied by the radial and ulnar arteries.Trace the course of the radial and ulnar arteries.Radial ArteryIt is on the lateral side of the forearm.It is the smaller terminal branch of the brachial artery.CommencementAt the cubital fossa at the level of the neck of the radiusCourseIt goes downward and laterally beneath the brachioradialis muscle and then resting on the deep muscles of the forearm.Its middle third goes with the superficial branch of the radial nerve on the lateral side.Its distal part is only covered by skin and fascia wherein it has the tendon of brachioradialis on its lateral side and the tendon of flexor carpi ulnaris on its medial side.TerminationIt terminates by winding around the lateral aspect of the wrist.BranchesMuscular branchesRecurrent radial branchesSuperficial palmar branchesUlnar arteryIt is on the medial side of the forearm.It is the larger artery of the two terminal branches of the brachial artery.CommencementAt the cubital fossa at the level of the neck of the radius.CourseIt enter the palm infront of the flexor retinaculum together with the ulnar nerveThe upper part of its course lies deep to most of the flexor musclesBelow, it goes superficial lying between the tendon of flexor carpi ulnaris and flexor digitorum superficialis.It goes down infront of the flexor retinaculum and lies laterally to the pisiform bone wherein it is only covered by skin and fascia.BranchesMuscular branchesRecurrent branchesCommon interosseous arteryBranches that take part in arterial anastomosis around the wrist joint.Describe the median and ulnar nerves.Median NerveIt leaves the cubital fossa by passing between the 2 heads of the pronator teres.CourseIt continues downward behind the flexor digitorum superficialis.It rests posteriorly on flexor digitorum profundus.At the wrist, it emerges from the lateral border of the flexor digitorum superficialis and lies behind the tendon of palmaris longus.It enters the palm by passing behind the flexor retinaculum.BranchesMuscular branchesArticular branchesAnterior interosseous nervePalmar cutaneous branchUlnar NerveCourseIt passes behind the medial epicondyle.It enters the front of the forearm by passing between the two heads of the flexor carpi ulnaris.It goes down the forearm between the...

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