language and space

Hughlings-Jackson applied his concepts of hierarchical organization to many other areas of behavior, including language and aphasia.It was his view that every part of the brain is involved in language, with each part making some special contribution.The relevant question was not where language is localized but what unique contribution is made by each part of the cortex.Thus if, for example, the nondominant (the nonlanguage) hemisphere is not involved in language but in spatial organization, then damage to that hemisphere would be revealed not just in spatial disabilities but also in language impoverishment because spatial concepts cannot be employed.Hughlings-Jackson was particularly modern-so much so, in fact, that his ideas are receiving more serious consideration today than they did in his own time.

[Fundamentals of human neuropsychology, Bryan Kolb&Ian Q.Whishaw]