autonomic nervous system rat 62 animal experiment 58 Rats 54 Male 50 endocrine system 50 Animal 46 nonhuman 38 Ganglia, Sympathetic 36 Rats, Inbred Strains 36 Norepinephrine 34 Support, Non-U.S. Gov't 34 noradrenalin 34 radioisotope 34 superior cervical ganglion 34 pineal body 30 Pineal Gland 26 central nervous system 24 propranolol 24 adrenergic system 22 article 22 drug efficacy 20 Animals 18 Female 18 animal 18 In Vitro 16 Thyroid Gland 16 alpha adrenergic receptor 16 phentolamine 16 priority journal 16