In embryology, the concept of lateral inhibition has been adapted to describe processes in the development of cell types.  Lateral inhibition is described as a part of the Notch signaling pathway , a type of cell–cell interaction. Specifically, during asymmetric cell division one daughter cell adopts a particular fate that causes it to be copy of the original cell and the other daughter cell is inhibited from becoming a copy. Lateral inhibition is well documented in flies, worms and vertebrates.  In all of these organisms, the transmembrane proteins Notch and Delta (or their homologues) have been identified as mediators of the interaction. Research has been more commonly associated with Drosophila , the fruit fly. 
For YEARS I had problems running and cycling, to the point that it became too painful and my leg spasmed at night. A doctor diagnosed sciatica but it was only recently a visit to a physio revealed weak and underused glute muscle. I was given excercises and also noticed myself that when walking my left hip is slightly forward, causing my left leg to take all the weight ans making my right leg trail slightly. Ive made a conscious effort to correct the way I walk and run so that only 2 weeks on I can run with no pain and Im keeping up the excercises.
Anyone with this type of problem should see a proper physio, well worth it.