BIO SCI 47 Study Guide - Final Guide: Menstruation, Group C Nerve Fiber, Cortisol
8 Jun 2018
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Stress Exam 3 Review
Stress and Aging
● GCs in salmon migration, GCs rise with age and death
○ Go up at the end of life of salmon
○ GCs cause salmon to go home
● Cortisol increases as you age
○ Worsens memory
■ Cortisol inhibits LTP
○ Disrupts sleep
■ Lack of deep sleep
■ Wake up often
Sleep
● Sleep cycle (be able to draw this)
○ REM, 1, 2, 3, 4
○ First two hours are deep sleep
● Stress is relieved by
○ Support
○ Touch
○ Predictability
○ Control
○ Good sleep
● Lack of sleep, amygdala more active
○ Frontal lobe becomes less active
■ Increase in amygdala caused a higher stress response
■ Increased cortisol
● Graveyard workers have higher cortisol levels
● Flight attendants who didn’t get a lot of sleep had smaller temporal lobes
○ Failing memory
● Corticolimbic system: Cortico is logic, Limbic is emotional
○ Cortex
○ Cingulate cortex
○ Amygdala
○ Hippocampus
Document Summary
Gcs in salmon migration, gcs rise with age and death. Go up at the end of life of salmon. Sleep cycle (be able to draw this) Increase in amygdala caused a higher stress response. Flight attendants who didn"t get a lot of sleep had smaller temporal lobes. Corticolimbic system: cortico is logic, limbic is emotional. Substance p is secreted from drg as an efferent which calls for mass cells which secrete histamine. Perseverance, amygdala is more active and prefrontal cortex is less active, thought process becomes clouded. A loop of not understanding why you"re feeling what you"re feeling. Hashimoto"s is a thyroid disease, often misdiagnosed as depression. Axons get sent from nucleus and innervate entire brain. Pain is useful bc it protects an injury from getting hurt more. Travels up spinal cord to the brain. A delta also travels unmyelinated to interneuron which stops spinal cord synapsing. C fiber unmyelinated comes, goes to interneuron stopping the stoppage.
