triune brain hypothesis. theory about evolution of human`s brain

amygdala amygdalae anatomical anatomy basal behaviours biology body brain callosum cerebellum cerebrum cingulate cognition complex component corpus cortex cross diagram education evolution feeling fornix frontal ganglia gland gyrus head health hippocamp hippocampus human hypothalamus hypothesis illustration instinctual labeled language limbic lobe mammalian medical medicine memories neocortex nervous part parts perception pituitary reasoning reasons region reptilian science section sensory septum spatial spinal system thalamus theory triune vector