The entire human enterprise runs on brain chemicals and hormones. Take those away and it all falls apart. All the silly stories, space travel, science fiction, wealth accumulation, family formation, goals, etc are all driven by these factors.
Human behavior is strongly influenced by brain chemicals (neurotransmitters) and hormones.
Key points: * Mechanisms * Neurotransmitters (e.g., dopamine, serotonin, norepinephrine, GABA, glutamate) shape moment-to-moment states: reward, motivation, mood, attention, inhibition, learning. * Hormones (e.g., cortisol, testosterone, estrogen, oxytocin, insulin) modulate longer-timescale drives and physiological states: stress responses, libido, social bonding, energy balance, growth and development. * Neuromodulators interact with neural circuits: they change the gain, plasticity, and valuation signals that guide decision-making rather than directly producing specific complex actions. * Degree of influence * Substantial: many drives and predispositions (hunger, thirst, desire, fear, social attachment, sleep, reward-seeking) are rooted in neurochemical/hormonal signaling. * Dopamine promotes motivation and reinforcement learning; low dopamine can reduce motivation, high phasic dopamine promotes pursuit of rewards. * Cortisol mobilizes resources under stress but chronic elevation impairs cognition and health. * Oxytocin enhances social bonding and trust in many contexts but effects depend on social cues and individual differences. * Testosterone is associated with dominance, risk-taking, and sexual motivation but expression depends on social context and personal values.
The entire human enterprise runs on brain chemicals and hormones. Take those away and it all falls apart. All the silly stories, space travel, science fiction, wealth accumulation, family formation, goals, etc are all driven by these factors.
ReplyDeleteHuman behavior is strongly influenced by brain chemicals (neurotransmitters) and hormones.
Key points:
* Mechanisms
* Neurotransmitters (e.g., dopamine, serotonin, norepinephrine, GABA, glutamate) shape moment-to-moment states: reward, motivation, mood, attention, inhibition, learning.
* Hormones (e.g., cortisol, testosterone, estrogen, oxytocin, insulin) modulate longer-timescale drives and physiological states: stress responses, libido, social bonding, energy balance, growth and development.
* Neuromodulators interact with neural circuits: they change the gain, plasticity, and valuation signals that guide decision-making rather than directly producing specific complex actions.
* Degree of influence
* Substantial: many drives and predispositions (hunger, thirst, desire, fear, social attachment, sleep, reward-seeking) are rooted in neurochemical/hormonal signaling.
* Dopamine promotes motivation and reinforcement learning; low dopamine can reduce motivation, high phasic dopamine promotes pursuit of rewards.
* Cortisol mobilizes resources under stress but chronic elevation impairs cognition and health.
* Oxytocin enhances social bonding and trust in many contexts but effects depend on social cues and individual differences.
* Testosterone is associated with dominance, risk-taking, and sexual motivation but expression depends on social context and personal values.