A brain region {limbic system}| {threshold system} {limbic lobe} on frontal-lobe interiors surrounds brainstem. In mammals, limbic system includes amygdala, caudate, cingulate gyrus, entorhinal cortex, fornix, hippocampus, hypothalamus, olfactory cortex, pyriform cortex, preoptic, putamen, septum, and thalamus. It receives from hypothalamus and basal ganglia. It sends to sense and motor cerebral cortex. It connects to sympathetic nervous system for activity and parasympathetic nervous system for relaxation.
Limbic system organizes essential drives, controls visceral processes, and involves emotions, fear, anger, flight, defense, and instincts. It does not integrate emotions.
evolution
Limbic system developed in primitive fish and is the most-ancient cerebral-hemisphere part. Limbic system is more important in mammals that rely on smell more than vision and less important in aquatic mammals and primates.
damage
Damage reduces cerebrum activity, and people enter dreamy state.
Body systems {mesolimbic system} can make cholecystokinin (CCK) peptide and dopamine (DA) catecholamine and send to other limbic system neurons in nucleus accumbens, lateral hypothalamus, ventral tegmentum, olfactory tubercle, and amygdala central nucleus. Schizophrenia causes mesolimbic-system hyperactivity.
4-Zoology-Organ-Nerve-Brain-Cerebrum
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0225