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Lactating rats were given distilled water or distilled water containing 0.067% lead chloride (500 ppm lead) as their sole source of drinking fluid from Days 1-21 of lactation. Activity, social investigation and rough and tumble play fighting behaviors of the offspring were observed on Day 26 and
Transdermal scopolamine is commonly used by mariners to prevent or treat seasickness. Most studies indicate that scopolamine administered transdermally via an adhesive patch does not impair performance of skills required to navigate a vessel, but trials have not been conducted testing navigation and
Most clinical trials investigating prevention of seasickness with transdermal scopolamine have been short-term, and little information regarding long-term use is available. We report here a double-blind trial conducted on board a flat-bottomed Republic of Singapore Navy vessel of 2,490 tons, sailing
Three standard CNS stimulants were tested for effect on juvenile play soliciting in prepubertal male rats (n = 120). Three dosages of each stimulant were compared with a saline control. Soliciting behavior was isolated and magnified by a novel method incorporating pretest social deprivation and
OBJECTIVE
To find and analyze descriptions in ancient Greek and Roman literature that reveal what was known at the time about seasickness.
METHODS
A systematic search was made in the original literature beginning in the Greek period with Homer in ca 800 bc and extending up to Aetios Amidenos in the
Rewards, as diverse as food, sweetened solutions, copulation, electrical brain stimulation, and drugs abused by humans, have been shown to condition place preferences in rats. Juvenile rats will readily learn to traverse a T-maze for the opportunity to interact with another similar-aged rat. This
Rats emit distinct types of ultrasonic vocalizations (USVs), which serve as situation-dependent affective signals. In appetitive situations, such as rough-and-tumble-play, high-frequency 50-kHz USVs occur, whereas low-frequency 22-kHz USVs can be observed in aversive situations, such as social