In short, Piriformis Syndrome itself is characterised by a combination of symptoms including pain in the lateral hip/buttock region (1). This is caused by irritation or compression of the Static nerve from the piriformis muscle, but should not be confused with Sciatica!
Subjective and objective testing is key and will help determine if the sciatic nerve is irritated due to compression by the Piriformis muscle.
Anatomy of the Piriformis
![](https://www.nlssm.com/wp-content/uploads/2023/06/depositphotos_16347875-stock-photo-pearpear-pear-fruit-pear-isolated-206x300.webp)
It is a pear-shaped muscle located deep in the lateral portion of the hip. In Latin it translates to pirium, meaning pear (2), which makes complete sense since this muscle is pear-shaped!
It is a funny little muscle with a number of functions, which are dictated by the position of the femur. This is due to its place of origin and insertion: the front surface of the sacrum, and inserts onto the greater trochanter of the femur. It’s not satisfied with just one job but four!
- External / Lateral rotation of the thigh at the hip joint – when the hip joint and femur are in a neutral position, extended or in a flexed position that is less than 60 degrees
- Internal/Medial rotator of the thigh at the hip joint – this will occur when the hip joint is flexed further than 60 degrees
- Abduction of the hip joint – can only happen when the hip is in flexion
- Stabilisation of the hip joint! Simple as that
Fun fact: Internal rotation of the hip is super important at end-of-range squats. If you are not able to engage internal rotation, you risk overloading the knees and not being to keep your feet turned out.
The piriformis is often blamed for a lot of issues around the hip. Remember though, there are 11 muscles in total that are involved in the external rotation of the hip. The piriformis is just one of them and also relatively tiny compared to some of the others.
![](https://www.nlssm.com/wp-content/uploads/2023/06/piriformis-blog-pic-1-1024x683.png)
To view video demonstrations please visit – https://www.nlssm.com/what-is-piriformis-syndrome/
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