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Naming Muscles
11.1, 11.2
| Term | Definition |
|---|---|
| Prime Mover | Agonist |
| Antagonist | Yields to effects of prime mover |
| Synergists | Prevent unwanted movements at intermediate joints; contract and stabilize intermediate joints |
| Fixators | Stabilize origin for more efficient primary action |
| Naming Categories | Size, shape, Action, # of origins, location of muscle, sites of origin and insertion |
| Direction--Rectus | Parallel to midline |
| Direction--Transverse | Perpendicular to midline |
| Direction--Oblique | Diagonal to Midline |
| Size--Maximus | Largest |
| Size--Minimus | Smallest |
| Size--Longus | Long |
| Size--Brevis | Short |
| Size--Latissimus | Widest |
| Size--Longissimus | Longest |
| Size--Magnus | Large |
| Size--Minor | Smaller |
| Size--Vastus | Huge |
| Shape--Deltoid | Triangular |
| Shape--Trapezius | Trapezoid |
| Shape--Serratus | Saw Toothed |
| Shape--Rhomboid | Rhombus |
| Shape--Orbicularis | Circle |
| Shape--Pectinate | Comblike |
| Shape--Piriformis | Pear-shaped |
| Shape--Platys | Flat |
| Shape--Quadratus | Square, four-sided |
| Shape--Gracilis | Slender |
| Action--Flexor | Reduces joint angle |
| Action--Extensor | Incr. angle |
| Action--Abductor | Bone away from midline |
| Action--Adductor | Bone towards midline |
| Action--Levator | Raises or elevates body part |
| Action--Depressor | Lowers |
| Action--Supinator, Pronator | Anterioly, posterioly palms |
| Action--Sphincter | Decreases opening size |
| Action--Tensor | Rigid |
| Action--Rotator | Rotates around long axis |