SOMMAIRE : 1 Evolution and variation 3 2 Neurons and sensory receptors 19 3 The vertebrate central nervous system 49 4 Vertebrate phylogeny and diversity in brain organization 73 5 Evolution and adaptation of the brain, behavior, and intelligence 93 6 Theories of brain evolution 113 7 Overview of spinal cord and hindbrain 127 8 The spinal cord 139 9 Segmental organization of the head, brain, and cranial nerves 157 10 Functional organization of the cranial nerves 173 11 Sensory cranial nerves of the brainstem 183 12 Motor cranial nerves 205 13 The reticular formation 221 14 The cerebellum 241 15 Overview of the midbrain 267 16 Isthmus 275 17 Tegmentum and tori 289 18 Optic tectum 311 19 Overview of the forebrain 343 20 Pretectum, accessory optic system, and migrated posterior tuberculum 373 21 Epithalamus 407 22 Dorsal thalamus 417 23 The visceral brain : the hypothalamus and the autonomic nervous system 445 24 Basal telencephalon 471 25 Nonlimbic pallium 495 26 Visual forebrain in amniotes 523 27 Somatosensory and motor forebrain in amniotes 547 28 Auditory and vocal forebrain in amniotes 571 29 Terminal nerve and olfactory forebrain 593 30 Limbic telencephalon 611 31 Evolution of brains : a Bilaterian view 637