Synergists and Antagonists

Topics: Scapula, Muscles of the upper limb, Triceps brachii muscle Pages: 2 (267 words) Published: December 11, 2012
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 Trunk
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