Synergists and Antagonists

Synergists: 1. Masseter and Temporalis a. Origin: Zygomatic Arch/Maxilla and Parietal bone b. Insertion: Ramus of Mandible and Coronoid Process of Mandible c. Function: Closes Jaw 2. Supraspinatus and Deltoid d. Origin: Scapula and Clavicle/Acromion e. Insertion: Humerus (shared) f. Function: Abducts Humerus 3. Biceps Brachii and Brachialis g. Origin: Scapula and Humerus h. Insertion: Radius and Ulna i. Function: Flexion of elbow 4. Rhomboid Major and Rhomboid Minor j. Origin: Spinous processes of T2 to T5 and C7 to T1 vertebrae k. Insertion: Medial border of Scapula (inferior and superior) l. Function: Adducts and Fixate Scapula 5. Internal Abdominal Oblique and External Abdominal Oblique m. Origin: Iliac crest and Ribs 5 to 12 n. Insertion: Ribs 10 to 12 and Iliac crest o. Function: Rotates trunk and supports abdominal wall
Antagonists:
1. Masseter and Platysma a. Origin: Zygomatic Arch/Maxilla and Subcutaneous tissue b. Insertion: Mandible (shared) c. Function: Close and Open Jaw 2. Deltoid and Teres Minor p. Origin: Clavicle/Acromion and Scapula d. Insertion: Humerus (shared) e. Function: Abducts and Adducts Humerus 3. Biceps Brachii and Triceps Brachii f. Origin: Scapula (shared) g. Insertion: Radius and Ulna h. Function: Flexion and Extension of elbow 4. Rhomboid Major and Serratus Anterior i. Origin: Spinous processes of T2 to T5 vertebrae and Upper 8 or 9 Ribs j. Insertion: Scapula (shared) k. Function: Adducts and Abducts Scapula 5. Rectus Abdominis and Erector Spinae l. Origin: Pubis and Spinous processes of T9 to T12 vertebrae m. Insertion: Ribs 5-7/Sternum and Spinous processes of T1 to T2 vertebrae n. Function: Flexes and Extends