Neuroscience and Neurobiology Commons^™

Some Parameters Of The Second-Order Conditioning Of Fear In Rats, Alan Kamil

Papers in Behavior in Biological Sciences

The effects of CS1 duration, partial reinforcement, and trace conditioning on second-order conditioned suppression were investigated, employing 64 rats as Ss. In Experiment 1, the clearest second-order conditioning was obtained when CS1 duration was the same during both the first- and the second-order conditioning phases of the experiment. In Experiment 2, somewhat better second-order conditioning was obtained when first-order conditioning had been under conditions of partial reinforcement, delay CS-US pairing. In neither experiment were CS1 suppression and CS2 suppression during second-order testing well correlated. This aspect of the results raised the question of the influence of nonclassical conditioning factors on …

The Inadequacy Of Intracranial Stimulation To The Posterior Hypothalamus To Serve As A Reinforcer For Maze Learning In The Rat, John A. Bull

All Master's Theses

Eighteen, 23 hour food deprived, self-stimulating rats were divided into two groups. One group received 20 ICS pulses as a reward for a correct response in a T-maze while the second group received a food reward. The subjects learned for food over 5 days of 10 massed trials per day, but failed to show learning for ICS either within sessions or over days. There was no difference in learning between rats with high bar press rates and those with low rates in either group.

A Method Of Slide-Making For Early Nervous System Study In The Chick Embryo, Roger L. Pscherer

Masters Theses

No abstract provided.

Chemical Poisoning In Animals. 2. Lead, H D. Seddon

Journal of the Department of Agriculture, Western Australia, Series 4

LEAD is the most frequent cause of poisoning in farm animals, especially of cattle.

All animals and man are susceptible to large doses, but small repeated doses may accumulate to toxic proportions in the body.

Cattle and sheep are more susceptible to poisoning and are more likely to have access to sources of lead.

Cerebral Anoxia And Its Residuals: Pt. Iii. The Structural Changes, Cyril B. Courville

Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists

No abstract provided.

Laboratory Applications Of Present Day Knowledge Of The Hormone Of The Anterior Lobe Of The Pituitary Gland, Herman F. Geske

Bachelors’ Theses

The history of a pregnancy diagnosis is an old one. In the report of Dr. S. Ashheim is a note which bears this out. The women of ancient Egypt used a rather crude method. Whether it was an efficient test the records do not state. Considering the fact that pregnancy and germination and growth are correlative, these women of the Nile probably were not so far wrong theoretically, whatever the practical results may have been. Their method was to put barley and wheat grains in a pot. These grains were wettened with urine from a woman who thought herself pregnant.