<Table> <Tr> <Th_colspan="2"> Triceps Brachii </Th> </Tr> <Tr> <Td_colspan="2"> Triceps brachii seen from behind . </Td> </Tr> <Tr> <Td_colspan="2"> Triceps brachii seen from behind . Three different colors represent three different bundles which compose triceps . Long head . Lateral head . Medial head . </Td> </Tr> <Tr> <Th_colspan="2"> Details </Th> </Tr> <Tr> <Th> Origin </Th> <Td> Long head: infraglenoid tubercle of scapula Lateral head: above the radial sulcus Medial head: below the radial sulcus </Td> </Tr> <Tr> <Th> Insertion </Th> <Td> Olecranon process of ulna </Td> </Tr> <Tr> <Th> Artery </Th> <Td> Deep brachial artery, posterior circumflex humeral artery (long head only) </Td> </Tr> <Tr> <Th> Nerve </Th> <Td> Radial nerve and Axillary nerve </Td> </Tr> <Tr> <Th> Actions </Th> <Td> Extends forearm, long head extends, adducts arm, Extends shoulder </Td> </Tr> <Tr> <Th> Antagonist </Th> <Td> Biceps brachii muscle </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Th> Latin </Th> <Td> Musculus triceps brachii </Td> </Tr> <Tr> <Th> TA </Th> <Td> A04. 6.02. 019 </Td> </Tr> <Tr> <Th> FMA </Th> <Td> 37688 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terms of muscle (edit on Wikidata) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Triceps Brachii </Th> </Tr>

What muscles are antagonist of the triceps brachii