Related by context. Frequent words. (Click for all words.) 54 genetically programmed 54 brains 52 Brain scans 48 Nerve cells 47 brain scans 46 metabolisms 46 brain 46 Fruit flies 45 parietal 45 exquisitely sensitive 44 teetotallers 44 shorter telomeres 44 anterior cingulate 44 mothers wombs 44 frontal lobes 44 thyroids 43 neural circuits 43 biological clocks 43 craniums 43 wakeful 43 prefrontal cortex 42 Serial killers 42 medial prefrontal cortex 42 cerebrum 42 Immune cells 42 libidos 42 intellects 42 neural circuitry 42 frontal cortex 42 suggestible 42 emotional arousal 42 unconsciously 42 fMRI scans 42 spatial reasoning 42 neurochemicals 42 neural pathways 42 Physiologically 41 IQs 41 cortex 41 frontal lobe 41 By Yoon Ja 41 temporal lobes 41 innate abilities 41 aortas 41 thyroid glands 41 stereotypic 41 neurones 41 circadian clocks 41 conformists 41 parietal lobe 41 cortisol levels 41 hormone cortisol 41 subcortical 41 mole rats 41 Unconsciously 40 bilinguals 40 nematode worms 40 repressed 40 stress hormone cortisol 40 procreate 40 caudate nucleus 40 metabolize alcohol 40 physiologically 40 caudate 40 prostates 40 suppressed 40 cortical thickness 40 cannabinoid receptors 40 impulses 40 neuropeptides 40 Sleep deprived 40 introverts 40 mirror neurons 40 Human beings 40 nondrinkers 39 psychopaths 39 copulate 39 stress hormones 39 habituate 39 dopamine receptors 39 brain shrinkage 39 cerebral cortex 39 bloodstreams 39 neurochemistry 39 Epidemiological studies 39 Neuroscientists 39 corticosterone 39 biological molecules 39 windpipes 39 unmedicated 39 spontaneously 39 schizophrenics 39 hermaphrodites 39 fecundity 39 Sperm whales 39 prefrontal 39 circumferences 39 hormonally 39 moral judgments 39 unfertilized 39 orbitofrontal cortex