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Lecture

Psyc330 Mar 19.docx

2 Pages
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Department
Psychology
Course Code
PSYC 330
Professor
Richard Wright

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Psyc330 Attention Across the Lifespan “Last­in/first­out” principle • Plate stacking mechanism metaphor good example • Significant development in interconnectivity of cortical layers during infancy • Visual acuity and discrimination of faces, etc. 1 vs. 2 month old • Sticky fixation in one month olds – difficulty looking away/disengaging o Pathways within the cortex are not available yet Aging and attention • Inevitable cognitive decline • Factors effecting cognitive decline o Diet  Nutrition­deficient diet  Food additive and colouring • Affect levels of neurotransmitter in our brain • Glutamine levels too low/high = death of brain cells o Oxygen Depletion o Stress   Stress can trigger increase in cortisol  Short­term increase in cortisol beneficial   Long term increase in cortisol levels are toxic and can lead to  neural damage  Stress increase calcium level inside neurons if prolonged, this can  lead to cell death.  Some foods and supplements are calcium channel blockers o Thyroid problems o Recreational drug use o Free Radicals  Free Radical hypothesis – ??   Smog  Smoke  Pesticides  Electromagnetic radiation  Heavy metals • At what age does cognitive decline begin? o No set time o Very modifiable o Death of neurons is inevitable as we age o Exercising you
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