WebAnterior portion flexes arm; lateral portion abducts arm. Serratus anterior. Abducts scapula and rotates it upward (boxer's muscle). Rectus abdominis. Flexes vertebral column and compresses abdomen. External & Internal Obliques. Two muscle pairs that flex vertebral column, compress abdomen, and laterally flex vertebral column. All muscles in the superficial layer originate from the front side of the humerus, just above the elbow joint: 1. Pronator teres: This muscle helps rotate the forearm. It … See more Flexor digitorum superficialis: This is the largest muscle in the anterior compartment and the only muscle in this layer. It attaches to the base of the hand and allows people to flex … See more

How the Biceps and Triceps Work Together North Tampa Spine …

WebApr 29, 2024 · Because it supplies the main force in flexing the arm, the biceps is referred to as the agonist muscle. The triceps, acting in opposition, is called the antagonist. Because the two muscles are … WebAug 16, 2024 · When your forearm moves toward your body by bending at your elbow, it’s called elbow flexion. The opposite movement is called elbow extension. The three bones involved in elbow flexion are the ... disintegrate suddenly 7 letters crossword

Chapter 8 Muscular System Flashcards Quizlet

WebB. Which muscle relaxes when the arm flexes? tricep. C. When the arm extends (straightens), which muscle contracts? tricep. D. Which muscle relaxes when the arm extends? bicep. E. Why do muscles work in pairs? muscles can only contract so it needs a pair to help it extend. Observe: Click on the biceps to see a close-up of the muscle. A. … WebAlthough a number of muscles may be involved in an action, the principal muscle involved is called the prime mover, or agonist.To lift a cup, a muscle called the biceps brachii is actually the prime mover; however, because it can be assisted by the brachialis, the brachialis is called a synergist in this action (Figure 1).A synergist can also be a fixator … WebFeb 11, 2009 · When you bend your elbow, the biceps muscle contracts. At the same time the antagonist muscle, that is the triceps muscle relaxes in synchronized manner. Vise verse action take place, when you ... cowboy lyrics \\u0026 chords