ABSTRACT
GABA Cerebellum, cerebral cortex, presynaptic inhibitors, retina
? There are receptors on the pre-as well as the postsynaptic elements at many synaptic junctions. The presynaptic receptors (also called autoreceptors) often inhibit further secretion of the transmitter, providing feedback control. This is, for
Adenosine Neocortex, olfactory cortex, hippocampus, cerebellum
ATP Not established
Polypeptides
Substance P Ubiquitous, retina
Vasopressin Posterior pituitary, medulla, spinal cord
Oxytocin Posterior pituitary, medulla, spinal cord
CRH Median eminence of hypothalamus, other parts of brain
TRH Median eminence of hypothalamus, other parts of brain, retina
GRH Median eminence of hypothalamus
Somatostatin Median eminence of hypothalamus, other parts of brain, retina
GnRH Median eminence of hypothalamus, circumventricular organs, retina
Endothelins Posterior pituitary, brain stem
Enkephalins Ubiquitous, retina
ß-Endorphin Hypothalamus, thalamus, brain stem, retina
CCK Cerebral cortex, hypothalamus, retina
VIP Postganglionic cholinergic neurons, hypothalamus, cerebral cortex, retina
Neurotensin Hypothalamus, retina
GRP Hypothalamus
Gastrin Hypothalamus, medulla oblongata
Glucagon Hypothalamus, retina
Motilin Neurohypophysis, cerebral cortex, cerebellum
Secretin Hypothalamus, thalamus, olfactory bulb, brain stem, cerebral cortex, hippocampus
CGRPa Taste pathways, medial forebrain bundle
Neuropeptide Y Medulla, periaqueductal grey, hypothalamus
Activins Brain stem
Inhibins Brain stem
Angiotensin II Hypothalamus, brain stem, spinal cord
Galanin Hypothalamus
ANP Hypothalamus, brain stem
BNP Hypothalamus, brain stem
However, autoreceptors can also facilitate the release of neurotransmitters.
