Pennate muscle
A pennate or pinnate muscle (also called a penniform muscle) is a type of skeletal muscle with fascicles that attach obliquely (in a slanting position) to its tendon. This type of muscle generally allows higher force production but a smaller range of motion. When a muscle contracts and shortens, the pennation angle increases.
| Rectus femoris | |
|---|---|
Muscles of the iliac and anterior femoral regions. (Rectus femoris highlighted in red.) | |
| Details | |
| Origin | anterior inferior iliac spine and the exterior surface of the bony ridge which forms the iliac portion of the acetabulum |
| Insertion | inserts into the patellar tendon as one of the four quadriceps muscles |
| Artery | lateral femoral circumflex artery |
| Nerve | femoral nerve |
| Actions | knee extension; hip flexion |
| Antagonist | Hamstring |
| Identifiers | |
| TA98 | A04.0.00.016 |
| TA2 | 1989 |
| FMA | 74993 |
| Anatomical terms of muscle | |
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