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Anatomy
Support and Movement
| Attachment of muscles | origin and insertion |
|---|---|
| Origin | point of attachment that does not move when the muscle contracts |
| Insertion | point of attachment that moves when the muscle contracts |
| Prime mover | a muscle that directly performs a specific movement |
| Agonist | any "mover" muscle that directly oppose prime movers; relax while the prime mover (agonist) is contracting to produce movement |
| Synergists | muscles that contract at the same time as the prime movers; they facilitate prime mover actions to produce a more efficient movement. |
| Fixator muscles | Joint stabilizers (type of synergist) |
| What are the 4 muscles of the abdominal wall? | External Oblique Internal Oblique Transversus abdominis Rectus abdominis |
| A muscle that originates on the medial epicondyle of the humerus is the | flexor carpi radialis. |
| The muscle fascicle arrangement of the orbicularis oris is best characterized as | circular |
| A muscle that attaches to the skeleton at the pubic crest and the xiphoid process and costal cartilages of ribs 5-7 is the | rectus abdominus |
| A muscle that originates on the lateral surfaces of the superior eight ribs is the | serratus anterior. |
| The rectus femoris demonstrates this type of muscle fascicle arrangement. | bipennate |
| The pectoralis major is an example of a muscle with this type of fascicle arrangement, that tends to be triangular in shape. | convergent |
| The rectus femoris demonstrates this type of muscle fascicle arrangement. | bipennate |
Created by:
anamk03
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