sympathetic nervous system is the part of your brain that controls fight or flight.
sympathetic nervous system is the part of your brain that controls fight or flight.
what part of your brain controls fight or flight?
sympathetic nervous system
the “triune theory of the brain” mclean, p. (2003) is one of several models used to theorize the organizational structure of the brain. the most ancient neural structure of the brain is the brain stem or “lizard brain.” the second phase is limbic or paleo-mammalian brain and performs the four functions needed for animal survival – fighting, feeding, fleeing, and fornicating. the third phase is the neocortex or the neo-mammalian brain. the higher cognitive functions which distinguish humans from other animals are primarily in the cortex. the reptilian brain controls muscles, balance, and autonomic functions, such as breathing and heartbeat. this part of the brain is active, even in deep sleep. the limbic system includes the hypothalamus, hippocampus, and amygdala. the neocortex includes the cortex and the cerebrum. it corresponds to the brain of primates and, specifically, the human species. each of the three brains is connected by nerves to the other two, but each seems to operate as its own brain system with distinct capacities. (see illustration in triune brain.)
nervous system network models
the neurons in the dorsal aspect of the facial motor nucleus receive inputs from both sides of the cortex, while those in the ventral aspect mainly receive contralateral inputs (i.e. from the opposite side of the cortex). the result is that both sides of the brain control the muscles of the upper face, while the right side of the brain controls the lower left side of the face, and the left side of the brain controls the lower right side of the face.









































section::::clinical significance.
facial motor nucleus