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8 Cards in this Set
- Front
- Back
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Acute Stress Response is a reaction to threatening stimuli, which includes? |
Avoidance behaviour Increased Vigilance and Arousal Activation of Sympathetic NS Release of Aderanline from Adrenal Medulla (fastest and first hormonal response) Release of cortisol from Adrenal Cortex |
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Cortisol is a steroid hormone produced by the Adrenal Gland, what are it's functions? |
Released in response to more intense or sustained stress Mobilizes energy reserves and suppresses the immune system Dysregulation/excessive release thought to contribute to anxiety disorders |
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Hypothalamus directly controls the stress response via? |
activation of Sympathetic NS & hormone release |
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What regulates the HPA axis? (hypothalamic-pituitary-adrenal axis) |
Amygdala & hippocampus |
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Amygdala activates stress via? |
central nucleus of amygdala (affects hypothalamus etc) |
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Studies in animals and humans show chronic stress causes degeneration of the hippocampus, this is possibly due to? |
Over-activation of neurons by glucocorticoids (cortisol) Causing excitotoxic cell death |
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Can hippocampal nuerons regenerate? |
Yes, neural stem cells within the hippocampus can produce new neurons. However is inhibited by chronic stress |
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watch lecture on GABA receptors |
watch lecture on GABA receptors |
