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Full-Text Articles in Medicine and Health Sciences
The Effects Of Footshock On The Reinforcing Efficacy Of Cocaine In Male Long-Evans Rats, Elizabeth S. Hendrick
The Effects Of Footshock On The Reinforcing Efficacy Of Cocaine In Male Long-Evans Rats, Elizabeth S. Hendrick
Theses and Dissertations
Many links exist between cocaine abuse and stress. The literature and laboratory studies in rats suggest that this could be because stress increases the reinforcing efficacy of cocaine. Using male Long-Evans rats, experiments in this thesis tested effects of footshock on the reinforcing efficacy of cocaine using a progressive ratio schedule of reinforcement. They also examined effects of footshock on the reinforcing efficacy of a half-maximal dose of cocaine. Finally, they tested the effects of footshock on cocaine self-administration in rats initially resistant to acquisition of cocaine self-administration. Footshock did not increase reinforcing efficacy of cocaine on a PR schedule …
Post-Juvenile Brain Development Modulates Seizure Characteristics And Diazepam Efficacy In The Rat Pilocarpine-Se Model, William H. Holbert Ii
Post-Juvenile Brain Development Modulates Seizure Characteristics And Diazepam Efficacy In The Rat Pilocarpine-Se Model, William H. Holbert Ii
Theses and Dissertations
These studies were completed to examine how status epilpeticus seizure characteristics are modulated during post-juvenile brain development. This may determine if postnatal age in rats is a better identifier of stages of post-juvenile brain development. The first study fully detailed the acute discrete seizure phase of the rat pilocarpine-SE model. Results for this study showed that Racine behavioral severity score, spike frequency, and seizure severity during the acute discrete seizure phase change in relation to post-juvenile brain developmental stages. The second study fully detailed early and late patterns of status epilepticus. Results for this study displayed modulation of time in …
The Study Of The Effect Of Drugs Of Abuse On Protein Kinase A Activity In Mouse Brain And Spinal Cord, George D. Dalton
The Study Of The Effect Of Drugs Of Abuse On Protein Kinase A Activity In Mouse Brain And Spinal Cord, George D. Dalton
Theses and Dissertations
Morphine and Δ9-THC are drugs that produce analgesia and rewarding effects. However, chronic treatment with morphine and Δ9-THC produces problematic side-effects including tolerance and physical dependence. The cellular mechanisms underlying opioid and cannabinoid antinociceptive tolerance have been studied for years. Research has demonstrated that the expression of morphine and Δ9-THC antinociceptive tolerance may be mediated through intracellular signaling pathways, such as the adenylyl cyclase /Protein Kinase A (PKA) cascade. The present study investigated the role of PKA in the expression of morphine and Δ9-THC antinociceptive tolerance. Male Swiss Webster mice were treated chronically with morphine or Δ9-THC and the warm-water …