One of the most interesting discoveries in the past decade is that the brain has a “waste management system.” Like people, in order to have the energy to do their work, brain cells need to eat (to absorb, primarily, sugar and oxygen). And, as in people, meals lead to wastes that need to be disposed of.
The waste management system (called the glymphatic system) is a series of tubes that carry fresh fluid into the brain, mix the fresh fluid with the waste-filled fluid that surrounds the brain cells, and then flush the mix out of the brain and into the blood. This occurs primarily during deep sleep.
There is some evidence that an under-functioning waste management system may play a role in the neurodegeneration that follows traumatic brain injury (as experienced by some football players, for example).
It may even play a role in other brain disorders, including Alzheimer’s disease. Since chronic sleep deprivation increases the risk for various brain diseases, it is plausible that it does so by reducing the function of the waste management system.
Why do we sleep? We know it helps to rest the body and to consolidate memories and learning. Perhaps we also need to sleep to flush wastes from our brain.
Bible verses for today’s meditation and inspiration: Matthew E. McLaren
Your beauty should not come from outward adornment, such as elaborate hairstyles and the wearing of gold jewelry or fine clothes. Rather, it should be that of your inner self, the unfading beauty of a gentle and quiet spirit, which is of great worth in God’s sight. 1 Peter 3:3-4 NIV
Above all else, guard your heart, for everything you do flows from it. Proverbs 4:23 NIV
As water reflects the face, so one’s life reflects the heart. Proverbs 27:19 NIV
May he give you the desire of your heart and make all your plans succeed. Psalm 20:4 NIV
The heart is deceitful above all things and beyond cure. Who can understand it? “I the Lord search the heart and examine the mind, to reward each person according to their conduct, according to what their deeds deserve.” Jeremiah 17:9-10 NIV
You will seek me and find me when you seek me with all your heart. Jeremiah 29:13 NIV
Let love and faithfulness never leave you; bind them around your neck, write them on the tablet of your heart. Then you will win favor and a good name in the sight of God and man. Proverbs 3:3-4 NIV
Trust in the Lord with all your heart and lean not on your own understanding; in all your ways submit to him, and he will make your paths straight. Proverbs 3:5-6 NIV
Create in me a pure heart, O God, and renew a steadfast spirit within me. Psalm 51:10 NIV
But the Lord said to Samuel, “Do not consider his appearance or his height, for I have rejected him. The Lord does not look at the things people look at. People look at the outward appearance, but the Lord looks at the heart.” 1 Samuel 16:7 NIV
Jesus replied: ‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ Matthew 22:37 NIV
Take delight in the Lord, and he will give you the desires of your heart. Psalm 37:4 NIV
Each of you should give what you have decided in your heart to give, not reluctantly or under compulsion, for God loves a cheerful giver. 2 Corinthians 9:7 NIV
A cheerful heart is good medicine, but a crushed spirit dries up the bones. Proverbs 17:22 NIV
My son, do not forget my teaching, but keep my commands in your heart, for they will prolong your life many years and bring you peace and prosperity. Proverbs 3:1-2 NIV
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