| Pineal
Gland: The Epithalamus |
| Hypothalamus |
| Pineal |
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| gland |
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| “Third Eye” |
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| Responds to |
|||||
| light stimulation |
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| to control |
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| diurnal |
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| biorhythms. |
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| SAD = Seasonal |
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| Affective
Disorder; |
|||
| due to inadequate |
|||
| light stimulation. |
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| Figure 12.12 |