Main Pairs of Antagonistic Muscles Free Essay Example, 1250 words

This paper tells that the main pairs of antagonistic muscles present in the human body and their respective movements are described as follows: 1. Biceps-Triceps: The upper end of the biceps or its origin is from the triangular bone at the back of the shoulder called scapula and its other end or insertion is on the Radius (inner) bone of the forearm. Contraction of biceps brings about flexion or rising of the forearm and this muscle is, therefore, a flexor muscle. The opposite or the antagonistic muscle is the Triceps which relaxes at the time the Biceps contracts. Triceps is located behind the upper arm and its origin is from the Scapula as well as the Humerus bone in the upper arm, and its point of insertion is at the Olecranon process of the Ulna (the exterior bone in the forearm). Contraction of Triceps straightens the arm and hence this muscle is known as an extensor muscle. 2.Anterior Tibialis and Gastrocnemius muscles: These muscles form the pair which is responsible for the movement of the lower leg. The two muscles are used when a person rocks forwards and backward on the feet. We will write a custom essay sample on Main Pairs of Antagonistic Muscles or any topic specifically for you Only $17.96 $11.86/page