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Transcript
STRESS, FEAR, AND THE FIGHT OR FLIGHT RESPONSE FIGHT OR FLIGHT OVERVIEW AMYGDALA HYPOTHALAMUS PITUITARY GLAND ADRENAL GLAND THROUGHOUT BODY THE HYPOTHALAMUS AND THE PITUITARY GLAND INSIDE THE PITUITARY GLAND THE BRAIN • Incoming info into Thalamus • Signal sent to Amygdila (decodes emotions) • Transmitted to Hypothalamus (Responds by initiation F or F) • Hypo. sends nerve impulse down spine • Hypo. activates Pituitary gland (Releases Hormone – ACTH) THE ADRENAL GLAND AND INSIDE EPINEPHRINE SPREADS THROUGH THE BODY THE BODY • • • • • • Nerve impulse from Hypo./ ACTH both reach Adrenal Nerve impulse signals chromofin cells – Epinephrine ACTH signals cells to produce Cortisol Both chemicals released from Adrenal gland Cortisol raises blood sugar (Frees fatty acids) Epinephrine reaches liver (Increases glucose production – more potential energy – ATP) – Reaches lungs (relaxes muscles/increases respiration (more O2 for muscles) – Reaches Heart (Beats faster – circulates energy faster) FIGHT OR FLIGHT OVERVIEW Brain receives/sends signals to pituitary Pituitary releases messengers to Adrenal Adrenal produces Epinephrine and Cortisol Cortisol frees fatty acids/raises sugar Adrenaline increases resp. allows more o2/energy (ATP) WHAT IS FEAR? PATHS OF FEAR Thalamus - decides where to send incoming sensory data (from eyes, ears, mouth, skin) Sensory cortex - interprets sensory data Hippocampus - stores and retrieves conscious memories; processes sets of stimuli to establish context Amygdala - decodes emotions; determines possible threat; stores fear memories Hypothalamus - activates "fight or flight" response TEXT FROM http://health.howstuffworks.com/mental-health/human-nature/other-emotions/fear.h SO WHAT DOES THIS RESPONSE LOOK LIKE? • Increase Heart rate • Pupils dilate (take in light) • Veins in skin tighten – allow flow to major muscles (chills – less blood in skin) • Muscles tense (goose bumps) • Focus on immediate ACTIVITY: Play the fight or flight game http://cmhc.utexas.edu/stressrecess/Level_One/fof.html
