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Distribution of monoamine‐containing nerve terminals in the brain of the painted turtle, Chrysemys picta
Author(s) -
Parent A.
Publication year - 1973
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901480203
Subject(s) - biology , anatomy , monoamine neurotransmitter , hypothalamus , turtle (robot) , reticular formation , painted turtle , free nerve ending , median eminence , tegmentum , neuroscience , nucleus , serotonin , midbrain , central nervous system , biochemistry , receptor , fishery
The distribution of monoamine (catecholamines and 5‐hydroxytryptamine)‐containing nerve terminals in the brain of the painted turtle ( Chrysemys picta ) was studied by means of the histofluorescence technique of Falck and Hillarp. The highest concentration of monoamine terminals in this reptilian brain occurs within the ventral region of the strio‐amygdaloid complex which on this basis may be related to the mammalian neostriatum (caudate nucleus and putamen). Numerous catecholamine type nerve endings are also present in several other regions of the turtle brain, namely: the dorsal cortical layer, the dorsolateral portion of the septum, the habenula, the nuclei dorsomedialis and dorsolateralis of the thalamus, the lateral part and median eminence of the hypothalamus, the tectum and the brain stem reticular formation (more especially its lateral edge). The greatest concentration of 5‐hydroxytryptamine (serotonin) type nerve endings is found in the dorsomedial portion of the septum, nucleus geniculatus lateralis, nuclei pretectalis, interpeduncularis and isthmi, the tectum and the reticular formation of the brain stem (more especially its medial portion). These monoamine nerve terminals belong to several groups of neurons whose cell bodies are located in the brain stem and, to a lesser degree, in the hypothalamus of the turtle.