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      Pineal function: the biological clock in the sparrow?

      Science (New York, N.Y.)
      Animals, Birds, physiology, Brain, anatomy & histology, Circadian Rhythm, Darkness, Light, Motor Activity, Pineal Gland, surgery, Radiation Effects

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          Abstract

          The pineal organ of the house sparrow, Passer domesticus, is essential for persistence of the circadian locomotor rhythm in constant conditions. Upon removal of the pineal body, activity becomes arrhythmic. However, pinealectomy does not abolish the rhythm of locomotor activity in birds exposed to light-dark cycles. Pinealectomized birds are entrained by light cycles in much the same manner as are normal birds. Our data demonstrate that the pineal organ is a crucial component of the endogenous time-measuring system of the sparrow.

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          Author and article information

          Journal
          5647435
          10.1126/science.160.3832.1125

          Chemistry
          Animals,Birds,physiology,Brain,anatomy & histology,Circadian Rhythm,Darkness,Light,Motor Activity,Pineal Gland,surgery,Radiation Effects

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