Acetylcholinesterase (ACHE)-positive nerve fibres in the thymus of the rat form perivascular plexuses as well as free ACHE-positive nerves, which do not follow the course of the vessels. A higher number of ACHE-positive nerves was observed in corticomedullary border and the medulla, a lower number in the cortex of the thymus lobuli. A gradual reduction of ACHE-positive intrathymus nerve formation was recorded and correlated with the increasing age of the rats. Nicotinamide adenine dinucleotide phosphate-diaphorase positive cells observed in the rat thymus were irregular with numerous projections and were located on the boundary of the cortex and medulla.
        
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Danko J, Ondrasovic M, Svicky E, Jenca A, Pospieszny N, Ondrasovicova O (2003) Histochemical study of innervation and NADPH-D activity of the thymus Anatomia Histologia Embryologia32: 233-5
Danko J, Ondrasovic M, Svicky E, Jenca A, Pospieszny N, Ondrasovicova O (2003) Anatomia Histologia Embryologia32: 233-5