Luria on frontal lobes

Working brain, p. 250
Frontal lobes maintain and control the general tone of the cortex, but with the aid of internal speech and under the influence of afferent inpulses reaching them from other parts of the cortex, formulates the intention or motor task, ensures its preservation and also its regulatory role, enables the performance of the action programme, and keeps a constant watch over its course.

Damage causes replacement of action programs with direct reactions arising uncontrollably to any stimulus, assuming the character of unsuppressed orienting reactions or echopraxia, the eruption of inert stereotypes, and with massive lesions the comparing role that allows awareness of mistakes and the ability to check the course of action.

The premotor zones the important cerebral apparatus for 'kinetic melodies' or series of skilled movements.

Mutual coordination of the hands occurswith anterior corpus callosum and lesions thereof leave each hand able to perform a task , but the two hands together unable to perform mutually coordinated movements.