Lesions of the dorsal premammillary nucleus (PMd) have been reported to produce dramatic reductions in responsivity of rats to a live cat. Such lesions provide a means of analyzing the potentially differential neural systems involved in different defensive behaviors, and the relationship between these systems and concepts such as anxiety. Rats with bilateral electrolytic lesions of the PMd were run in an elevated plus maze (EPM), exposed first to cat odor and then to a live cat, and assessed for postshock freezing and locomotion. PMd lesions produced a dramatic reduction in freezing, avoidance, and stretch attend to the cat odor stimulus, and reduction in freezing, with greater activity, and enhanced stretch approach to cat exposure. However, PMd lesions had minimal effects in the EPM, and postshock freezing scores were unchanged. These results confirm earlier findings of reduced defensiveness of PMd-lesioned rats to a cat, extending the pattern of reduced defensiveness to cat odor stimuli as well, but also suggest that such lesions have few effects on nonolfactory threat stimuli.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0304-3940(03)00415-4 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effects of Chenpi ( cv. ) on serum antioxidant enzymes, inflammatory factors, and intestinal health in Beagle dogs.
Front Microbiol
January 2025
Chongqing Sweet Pet Products Co., Ltd., Chongqing, China.
Ensuring companion animal welfare is a top priority for the pet industry and owners alike. The health of the pets can be directly and effectively improved through diet. Chenpi includes beneficial ingredients with proven anti-inflammatory, antioxidant, and immunomodulatory properties.
View Article and Find Full Text PDFCalibration of visible and near-infrared spectral imaging technology to predict the quality evolution of retail fresh pork bellies with different fat content.
Food Res Int
January 2025
IRTA-Food Quality and Technology, Finca Camps i Armet, 17121 Monells, Girona, Spain. Electronic address:
This study investigates quality changes occurred in sliced pork belly with different fat content during refrigerated storage, and the potential of spectral imaging technology in predicting quality properties. Pork bellies with different fat levels (low 'LF', medium 'MF' and high 'HF') were selected from slaughtering houses and directly transferred to the laboratory. The sliced bellies were packed in modified atmosphere packages with high oxygen levels (80 %) and the essential visual and olfactory characteristics, microbiological load, pH, lipid oxidation and colour values were assessed throughout 20 days of refrigerated storage.
View Article and Find Full Text PDFReduction of urinary felinine in domestic cats with renal diseases leads to decreased catty odor.
J Vet Med Sci
January 2025
Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Iwate, Japan.
Cats with progressive renal diseases often exhibit a weakened urinary odor, in contrast to normal cat urine which emits odorants with catty odor, such as 3-mercapto-3-methyl-1-butanol, 3-mercapto-3-methylbutyl formate, 3-methyl-3-methylthio-1-butanol, and 3-methyl-3-(2-methyldisulfanyl)-1-butanol. Felinine, an amino acid, is a precursor of these odorants and metabolized from its precursor, 3-methylbutanol glutathione (MBG), via 3-methylbutanol-cysteinylglycine (MBCG). While previous studies have reported felinine excretion in normal cats, its levels in cats with renal diseases remain unclear.
View Article and Find Full Text PDFIdentification of a staphylococcal dipeptidase involved in the production of human body odor.
J Biol Chem
December 2024
Department of Biology, University of York, York, UK; York Biomedical Research Institute, University of York, York, UK. Electronic address:
The production of human body odor is the result of the action of commensal skin bacteria, including Staphylococcus hominis, acting to biotransform odorless apocrine gland secretions into volatile chemicals like thioalcohols such as 3-methyl-3-sulphanylhexan-1-ol (3M3SH). As the secreted odor precursor Cys-Gly-3M3SH contains a dipeptide, yet the final enzyme in the biotransformation pathway only functions on Cys-3M3SH, we sought to identify the remaining step in this human-adapted biochemical pathway using a novel coupled enzyme assay. Purification of this activity from S.
View Article and Find Full Text PDFPork quality and histological properties of longissimus muscle from boars and early and late immunocastrated pigs.
Meat Sci
January 2025
IRTA-Food Quality and Technology, Finca Camps i Armet, 17121 Monells (Girona), Spain. Electronic address:
Immunocastration has been introduced in pig production to reduce boar taint. However, there is not much information on how different schedule of immunocastration affects meat quality, especially muscle histological properties. In this study, carcass and meat quality characteristics, histological properties of the longissimus dorsi muscle, sensory characteristics and fatty acid composition of meat and fat from entire males (EM), late immunocastrated (LIC, first dose 8 weeks before slaughter, second dose 4 weeks before slaughter) and early immunocastrated pigs (EIC, first dose 13 weeks before slaughter, second dose 8 weeks before slaughter) were compared.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!