The present edition is the first English translation of a large partof Justo Gonzalo's original work on Brain Dynamics, closely related to current research topics. Some of the phenomena described wereobserved much later and others are still unknown. In the parts of Vol. 1 (1945) and 2 (1950) the author characterizes, on the basis of brain injuries from the Spanish Civil War, the central syndrome of thecerebral cortex (multisensory and bilateral disorder) caused by asingle unilateral parietoocipital lesion. The observed dynamiceffects, such as a gradual loss of functions with decreasing stimulusand their recovery by its intensification or by multisensory or motorfacilitation, or by iteration, are explained on a physiological basis. The author describes a careful experimental, quantitative analysis of visual and tactile functions, finding a continuity between simplesensations and higher brain functions. He describes for the first time in great detail phenomena such as inverted or tilted vision, somecolor disorders, reversal of motion, facilitation, etc. Tactileinversion is also described, generalizing the inverted perception inthe central syndrome.

Supplement I is the 1952 publication in which the author reports additional cases, and proposes, for thefirst time, that the specificity of a human brain function isdistributed in gradation across the cortex, resulting in braingradients and a unitary conception of the cortex. Supplement II dealswith the concepts of dynamic similarity and allometric scaling powerlaws applied to the central syndrome, and shows later illustrations by the author.