Pictured above is the flexor hallucis longus muscle (the 'big toe flexor'). It stabilizes your foot & ankle for balance by pulling your big toe toward the bottom of your foot. If contracted hard enough, it pulls the bottom of your foot toward the back of your lower leg like when you point your toes. It attaches underneath the soleus muscle on the lower 2/3 of the back of your lower leg bones moreso on the smaller outer bone (the fibula), and its tendon runs down the back inside of your ankle and attaches to the bottom of only the big toe.
If this muscle locks up it will feel tight and possibly painful along the lower portion of the back of your lower leg, and your big toe will not move well. This muscle and the flexor digitorum longus are BIG contributors to hammer toes, claw toes, and other general lower leg and foot pains. Rarely will this muscle lock up without the other toe flexor muscle needing attention too (the flexor digitorum longus). The soleus muscle ALWAYS needs attention if your flexor muscles are locked up, and your toe extensors will also likely need some TLC on the front of your lower leg deeper than the anterior tibialis.
The flexor hallucis longus muscle is displayed on the right leg. On the left leg the muscles located in the back of your lower leg are layered, showing how some of the muscles are covered by the others. All of the muscles are see-through so that you can appreciate the location and size of each muscle relative to the others. You can access detail for all the muscles in the body with our Coach membership.
Click here for a list of all the muscles.
Muscles that cross or attach to the hip or thigh bone (femur) and attach below the knee joint and DO NOT attach to the knee cap (patella)
The following muscles attach across or below the knee.
Click the appropriate link for your interest.
Muscles that cross the knee
Muscles that pass or attach between the knee & ankle
- Peroneus Longus
- Peroneus Brevis
- Flexor Digitorum Longus
- Flexor Hallucis Longus
- Posterior Tibialis
- Anterior Tibialis
- Extensor Digitorum Longus
- Extensor Hallucis Longus
Good luck working out those tight knots.
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