Muscle Attachments
Insertion of the triceps brachii
Olecranon process of the ulna
Actions of biceps brachii
Elbow flexion, shoulder flexion, supination
Innervation of pectoralis major
Medial and lateral pectoral nerve
Section of the brachial plexus containing the dorsal scapular nerve
Roots
An athlete presents to the athletic training clinic with weakness when flexing the elbow. An injury to which nerve would lead to this weakness?
Musculocutaneous nerve
Origin of the long head of the biceps brachii
Actions of pronator teres
pronation, elbow flexion
Innervation of opponens pollicis
Median nerve
Section of the brachial plexus containing the medial antebrachial cutaneous nerve
Medial cord
Muscles of the posterior compartment of the forearm perform ______ and are innervated by the ______ nerve
Wrist and finger extension; radial
Insertion of the subscapularis
Lesser tubercle of the humerus
Actions of teres major
Shoulder extension, adduction, and internal rotation
Innervation of infraspinatus
Section of the brachial plexus containing the lower subscapular nerve
Posterior cord
Flexion of the thumb occurs in the _____ plane around a(n) ______ axis
Frontal; anterior to posterior
Origin of the pectoralis minor
Ribs 3-5
Actions of flexor carpi ulnaris
Wrist flexion, ulnar deviation, assist with elbow flexion
Innervation of rhomboid minor
Dorsal scapular nerve
Section of the brachial plexus containing the nerve to subclavius
Superior trunk
An athlete presents with excessive laxity when a valgus force is applied to the elbow. Which ligament is likely injured?
Ulnar collateral ligament
Insertion of flexor digitorum superficialis
Sides of the middle phalanges of digits 2-5
Actions of the lumbricals
Flexion of the MCP joints and extension of the IP joints of digits 2-5
Innervation of trapezius
Spinal accessory nerve (CN XI)
Section of the brachial plexus containing the lateral pectoral nerve
Lateral cord
What structures are contained within the carpal tunnel?
FDS tendons, FDP tendons, FPL tendon, median nerve