Ether anesthesia following one-trial passive avoidance conditioning interferes with the acquisition of the avoidance response (Abt, Essman, & Jarvik, 1961). The amount of the interference decreases as the interval between learning (footshock) and administration of ether increases (Alpern & Kimble, 1967; Pearlman, 1966). These results are typically interpreted to mean that ether disrupts memory ...

objective(s) the present study aimed to investigate the effects of a fat soluble antioxidant, coenzyme q10 (coq10) and folic acid on learning and memory in the rats with intracerebroventricular injection of streptozotocin (icv-stz), an animal model of sporadic type of alzheimer's disease. materials and methods the lesion groups were injected bilaterally with icv-stz (1.5 mg/kg b.wt., in no...

background: alzheimer’s disease was known as a progressive neurodegenerative disorder in the elderly and is characterized by dementia and severe neuronal loss in the some regions of brain such as nucleus basalis magnocellularis. it plays an important role in the brain functions such as learning and memory. loss of cholinergic neurons of nucleus basalis magnocellularis by ibotenic acid can commo...

introduction: zinc is an essential trace element that plays an important role in synaptic plasticity and modulating the activity of cns and involve in learning and memory. synaptic vesicle zinc in the hippocampus area exerting modulatory effects on nmda glutamate receptor. method: in this experiment the effects of nmda agonist and antagonist administration intra hippocampus on passive avoidance...

a b s t r a c t introduction: diabetes mellitus is accompanied with disturbances in learning, memory, and cognitive skills in the human society and experimental animals. due to anti-diabetic and antioxidant activity of rumex patientia (rp), this research study was conducted to evaluate the efficacy of chronic rumex patientia feeding on alleviation of learning and memory disturbance in streptozo...

background: different stressors induce learning and memory impairment and physical activity influence learning and memory enhancement. in this research, we investigated the effect of synchronized running activity with stress on acquisition and retention time of passive avoidance test. methods: male wistar rats were randomly divided into five groups as follows: control (co), sham (sh), exercise ...

morphine’s effects on learning and memory processes are well known to depend on synaptic plasticity in the hippocampus. whereas the role of the hippocampus in morphine-induced amnesia and state-dependent learning is established, the biochemical and molecular mechanisms underlying these processes are poorly understood. the present study intended to investigate whether administration of morphine ...

Background: Morphine is wildly used as a painkiller in clinics, but causes several side effects such as hyperalgesia, depression and more notably amnesia. Here, we assumed that insulin-like Growth Factor-1 (IGF-1) as a peptide with widespread distribution of receptors in brain regions, especially hippocampus, might be capable to alleviate morphine-induced amnesia. Meth...

electromagnetic field (emf) radiation affects cellular and brain chemistry and function, resulting in deleterious effects such as free radicals formation, impaired dna repair, reduced melatonin and blood brain barrier protection, and defects on learning and memory and other higher brain functions. in this paper the effects of low frequency emf of 50- and 217 hz, ranges often associated with com...

materials and methods thirty-two adult male wistar rats were randomly allocated to four groups: normal, diabetic, normal + extract of c. mukul and diabetic + extract of c. mukul groups with free access to regular rat diet. diabetes was induced in male rats by single interaperitoneal injection of 60 mg/kg stz. after the confirmation of diabetes, 300 mg/kg c. mukul extract was orally administered...