Location
The pineal gland is reddish-gray and about the size of a grain of rice (5–8 mm) in humans, located just rostro-dorsal to the superior colliculus and behind and beneath the stria medullaris, between the laterally positioned thalamic bodies. It is part of the epithalamus.
The pineal gland is a midline structure shaped like a pine cone, and is often seen in plain skull X-rays, as it is often calcified; calcification has been shown in one study to correlate with the accumulation of fluoride.
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