Leg Cramps Anatomy
To better understand leg cramps, it helps to understand the anatomy of the leg.
The entire leg contains four bones:
The thigh contains the largest bone in the body, called the femur. The femur begins at the hip and ends at the knee. The muscles of the thigh control movement of the knee and hip. The patella, or kneecap, protects the front of the knee.
The lower leg contains two long bones, called the tibia and fibula. The muscles of the lower leg control movement of the foot and ankle.
Leg anatomy examples:
- Anderson T. Cochrane made simple. Interventions for leg cramps in pregnancy. Pract Midwife. 2007 Oct;10(9):40. 
- Butler JV, Mulkerrin EC, O'Keeffe ST. Nocturnal leg cramps in older people. Postgrad Med J. 2002 Oct;78(924):596-8. 
- Ferini-Strambi L. RLS-like symptoms: differential diagnosis by history and clinical assessment. Sleep Med. 2007 Aug;8 Suppl 2:S3-6. Epub 2007 Jun 12. 
- Young G. Leg cramps. Clin Evid. 2006 Jun;(15):1613-8.