Arm Muscles Questions & Answers

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Arm Muscles Questions & Answers Anterior arm muscles perform what action? - ANS-Flexion Posterior arm muscles perform what action? - ANS-Extension List the elbow flexors? - ANS-Biceps Brachii, Brac... hialis, Brachioradialis Lest the elbow extenders? - ANS-Triceps Brachii (lateral head, long head, medial head), Anconeus Where is the Biceps Brachii located? - ANS-Located superficially on anterior humerus , just inferior and medial to Deltoid. What are the names of the heads of the Biceps Brachii? Where are each located? - ANS-The long head, located laterally (3), and the short head (2), located medially Biceps Brachii Origin, Insert, and innervation? - ANS-O: Short head: Coracoid process of scapula Long head: Supraglenoid tubercle of scapula (above glenoid fossa) Insert: Bicipital tuberosity of radius; Bicipital aponeurosis (#4 in picture) Innervation: Musculocutaneous Nerve Actions of Biceps Brachii: - ANS-Powerful elbow flexor, supinator of elbow against resistance (pivot joint: spinning of the head of radius in annular ligament, as when palm faces anteriorly), , Also Shoulder flexion because originates at shoulder. What 3 joints does the Biceps Brachii act on? - CONTINUES... [Show More]

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