Normal changes in functional activity can alter the quantity of glycogen present in brain and retina. The normal circadian rhythm effects this so that, for example, brain glycogen (in mouse) is lowest coincident with the peak of locomotor activity and body temperature (Hutchins and Rogers, 1970). This was not found to be the case in the neonate chick in which brain glycogen, although showing a circadian variation, was not apparently closely related to changes in motor activity or body temperature (Edwards and Rogers, 1972).


Glycogen Content Brain Glucose Glycogen Granule Glycogen Accumulation Lateral Geniculate Body 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1975

Authors and Affiliations

  • M. Z. M. Ibrahim
    • 1
  1. 1.Department of Human Morphology, School of MedicineAmerican University of BeirutBeirutLebanon

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