The Ordered Origin of the Brain

Abstract

Organisms which consist of one cell, the protozoa, do not possess the organs that emerged in multicellular species. They have no heart, no stomach and no brain. Yet they already contain, within the single cell, rudimentary structures which later in evolution resulted in large and highly specialized organs. These organelles, as they are called, may be sophisticated.

Sources of Figures

Fig. 19.1 Friday, A. and Ingram, D.S. (Editors) 1985. The Cambridge Encyclopedia of Life Sciences. Cambridge University Press, Cambridge, UK (Fig. 2.26, page 90).

Fig. 19.2 (1) Finlay, B.L. and Darlington R.B. 1995. Linked regularities in the development and evolution of mammalian brains. Science 268: 1578–1584 (Fig. 1, page 1578). (2) Rilling, J.K. 2001. Allometric departures for the human brain provides insights into hominid brain evolution. In: Finlay, B.L. et al. 2001. Developmental Structure in Brain Evolution. Behavioral and Brain Sciences 24: 263–308 (Fig. 1, page 292). (3) Schoenemann, P.T. 2001. Brain scaling, behavioral ability, and human evolution. In: Finlay, B.L. et al. 2001. Developmental Structure in Brain Evolution. Behavioral and Brain Sciences 24: 263–308 (Fig. 1, page 293).

Fig. 19.3 (1) Purves, D. et al. (Editors) 2012. Neuroscience. Sinauer Associates, Sunderland, MA, U.S.A. (Fig. 22.4, page 483). (2) Purves, D. et al. (Editors) 2012. Neuroscience. Sinauer Associates, Sunderland, MA, U.S.A. (Fig. on page 484, Part A).