Sleep-wake cycle: Difference between revisions

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===Approaching night===

*The decreasing of the light levels which were activating melanopsin cells gradually shut off the signal to the suprachiasmatic nucleus, stopping GABA from being sent to the pineal gland allow melatonin to be released

*In the presence of insulin melatonin causes upregulation of leptin allowing one to fast while they sleep<ref>https://www.ncbi.nlm.nih.gov/pubmed/15572654 | Melatonin enhances leptin expression by rat adipocytes in the presence of insulin.</ref> (If one has been fasting before sleep insulin levels will be low causing melatonin to downregulate leptin instead of upregulating it, thus encouraging one to eat before they sleep)

*High levels of adenosine activating the adenosine receptor A1 inhibit cholinergic neurons in the basal forebrain<ref>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3362278/ | Adenosine inhibits glutamatergic input to basal forebrain cholinergic neurons</ref> thus gradually causing cognitive decline.<ref>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2659740/ | The Role of Acetylcholine in Learning and Memory</ref>

*~~Activation~~ of adenosine receptor (A(2A)R) causes the release of GABA in the tuberomammillary nucleus to inhibit histamine, thus inducing sleepiness.<ref>http://www.ncbi.nlm.nih.gov/pubmed/15748171 | An adenosine A receptor agonist induces sleep by increasing GABA release in the tuberomammillary nucleus to inhibit histaminergic systems in rats.</ref>

*In addition activation of adenosine receptor (A(2A)R) causes the release of GABA in the tuberomammillary nucleus to inhibit histamine, thus inducing sleepiness.<ref>http://www.ncbi.nlm.nih.gov/pubmed/15748171 | An adenosine A receptor agonist induces sleep by increasing GABA release in the tuberomammillary nucleus to inhibit histaminergic systems in rats.</ref>

*In the presence of insulin melatonin causes upregulation of leptin allowing one to fast while they sleep<ref>https://www.ncbi.nlm.nih.gov/pubmed/15572654 | Melatonin enhances leptin expression by rat adipocytes in the presence of insulin.</ref> (If one has been fasting before sleep insulin levels will be low causing melatonin to downregulate leptin instead of upregulating it, thus encouraging one to eat before they sleep)

===Fast asleep===

@@ Line 15: / Line 15: @@
 ===Approaching night===
+*The decreasing of the light levels which were activating melanopsin cells gradually shut off the signal to the suprachiasmatic nucleus, stopping GABA from being sent to the pineal gland allow melatonin to be released
+*In the presence of insulin melatonin causes upregulation of leptin allowing one to fast while they sleep<ref>https://www.ncbi.nlm.nih.gov/pubmed/15572654 | Melatonin enhances leptin expression by rat adipocytes in the presence of insulin.</ref> (If one has been fasting before sleep insulin levels will be low causing melatonin to downregulate leptin instead of upregulating it, thus encouraging one to eat before they sleep)
 *High levels of adenosine activating the adenosine receptor A1 inhibit cholinergic neurons in the basal forebrain<ref>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3362278/ | Adenosine inhibits glutamatergic input to basal forebrain cholinergic neurons</ref> thus gradually causing cognitive decline.<ref>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2659740/ | The Role of Acetylcholine in Learning and Memory</ref>
-*Activation of adenosine receptor (A(2A)R) causes the release of GABA in the tuberomammillary nucleus to inhibit histamine, thus inducing sleepiness.<ref>http://www.ncbi.nlm.nih.gov/pubmed/15748171 | An adenosine A receptor agonist induces sleep by increasing GABA release in the tuberomammillary nucleus to inhibit histaminergic systems in rats.</ref>
+*In addition activation of adenosine receptor (A(2A)R) causes the release of GABA in the tuberomammillary nucleus to inhibit histamine, thus inducing sleepiness.<ref>http://www.ncbi.nlm.nih.gov/pubmed/15748171 | An adenosine A receptor agonist induces sleep by increasing GABA release in the tuberomammillary nucleus to inhibit histaminergic systems in rats.</ref>
-*In the presence of insulin melatonin causes upregulation of leptin allowing one to fast while they sleep<ref>https://www.ncbi.nlm.nih.gov/pubmed/15572654 | Melatonin enhances leptin expression by rat adipocytes in the presence of insulin.</ref> (If one has been fasting before sleep insulin levels will be low causing melatonin to downregulate leptin instead of upregulating it, thus encouraging one to eat before they sleep)
 ===Fast asleep===