Figure 7

Diagram illustrating the neural pathway by which the SCN controls the secretion of pineal melatonin. Melatonin feeds back to influence neurons in the SCN. IML, intermediolateral cell column of the spinal cord; Mel, melatonin; PVN, paraventricular nucleus; RHT, retinohypothalamic tract; SCG, superior cervical ganglion; SCN, suprachiasmatic nucleus.

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published 2000