animal experiment 16 autonomic nervous system 16 rat 16 endocrine system 14 nonhuman 14 Male 12 Rats 12 Sympathectomy 12 Animal 10 Ganglia, Sympathetic 10 Rats, Inbred Strains 10 Norepinephrine 8 Support, Non-U.S. Gov't 8 adrenergic system 8 noradrenalin 8 propranolol 8 superior cervical ganglion 8 thyroid gland 8 Thyroid Gland 6 drug efficacy 6 phenoxybenzamine 6 Animals 4 Cyclic AMP 4 Hypothalamo-Hypophyseal System 4 Hypothalamus, Middle 4 Pineal Gland 4 Propranolol 4 Sympathetic Nervous System 4 adrenergic receptor 4 article 4