Question: what muscles are antagonist of the triceps brachii
Answer: Details Origin Long head : infraglenoid tubercle of scapula Lateral head : above the radial sulcus Medial head : below the radial sulcus Insertion Olecranon process of ulna Artery Deep brachial artery , posterior circumflex humeral artery ( long head only ) Nerve Radial nerve and Axillary nerve Actions Extends forearm , long head extends , adducts arm , Extends shoulder Antagonist Biceps brachii muscle Identifiers Latin Musculus triceps brachii TA A04.