The authors describe the technique of Strayer's operation (gastrocnemius recession) in the spastic form of cerebral palsy and draw attention to its indications, possible combinations with other operations and technical errors associated with its implementation. They evaluate 644 operations made by Strayer's method. In 361 regularly followed-up patients they evaluate from the long-term aspect combined operations of the lower extremities (which form a functional unit), using as a basis their own locomotor and position standards. They emphasize the necessity of a correct strategy, i.e. selection and sequence of surgical procedures. They recommend Strayer's operation (gastrocnemius recession) as the basic operation in pes equinus spasticus and in genu flectum spasticum. In the conclusion they present their own modification of Strayer's operation elaborated by the first author.