Memory short term

Environmental exposures to PCBs are significantly lower than those reported in the workplace and are therefore unlikely to cause adverse human health effects in adults. However, it is apparent from the results of several recent studies on children that there was a correlation between in utero exposure to PCBs, eg, cord blood levels, and developmental deficits (65—68) including reduced bkth weight, neonatal behavior anomaUes, and poorer recognition memories. At four years of age, there was stiU a correlation between prenatal PCB exposure levels and short-term memory function (verbal and quantitative). In these studies the children were all exposed to relatively low environmental levels of PCBs. Although these effects may be related to other contaminants, it is clear that this is an area of concern regarding the potential adverse human health impacts of PCBs. 

Posters on specific hazards are useful as short-term memory joggers if they are aimed at specific topics and are placed in appropriate positions. Fear or anxiety inducing posters must be used with caution. General safety awareness posters have not been shown to be effective... 

Often referred to as short-term memory loss , this form of amnesia results in the inability to transfer new events to long term memory. The sufferer will still be able to recall older memories but will not be able to remember recent events once attention has been switched to something else. 

Yanofsky NN, Nierenberg D, Turco JH (1991) Acute short-term memory loss from trimethyltin exposure. Journal of Emergency Medicine, 9 137-139. 

In the past, trichloroethylene was used as a human anesthetic. Trichloroethylene has also been used by individuals who intentionally inhale it for its narcotic properties. Therefore, most of the information regarding the effects of trichloroethylene in humans comes from case studies and experiments describing effects of trichloroethylene after inhalation exposure. These studies indicate that the primary effect of exposure to trichloroethylene is on the central nervous system. Effects include headache, vertigo, fatigue, short-term memory loss, decreased word associations, central nervous system depression, and anesthesia. 

Impairments in short-term memory 10-20 mg/kg, s.c., twice daily, 3 days 2 weeks Marston et al.134... 

Hindmarch I (1986). Activity of Ginkgo biloba extract on short-term memory. Presse Medicale, 15, 1592-1594. 

Impaired short-term memory, difficulty learning complex tasks... 

Short-term memory vs. long-term memory 861... 

Mercury content, in pg/L, of 100 in urine and 280 in blood Mercury content, in pg/L, of 250 in urine and 500 in blood Increased tremors Increased prevalence of abnormal psychomotor scores Disturbances in tests on verbal intelligence and memory Short-term memory loss Increased tremor frequency and reaction time... 

Random walks are often called Markov random walks. A Markov chain is a sequence of random events described in terms of a probability that the event under scmtiny evolved from a defined predecessor. In effect there is no memory of any preceding step in a Markov chain. Hidden Markov processes involve some short-term memory of preceding steps. 

Braff L., Callaway, E., and Naylor, H. (1977) Very short term memory (VSTM) dysfunction in schizophrenia. Arch. Gen. Psychiatry, 34 25-30. 

My brain was so far gone at that point, I couldn t track a conversation or hold a thought. My short-term memory was gone. I was relying on my nurse to cover for me. She wasn t as sick as I was, because I was exposed to fumes in the treatment room and in my office. 

I had no support system there, so I started a HEAL chapter. What happened was, I started to get phone calls from people complaining about conditions in their children s schools. I thought maybe this was an area I needed to look into, so I started doing research. Nobody seemed to have any research on sick schools, so I just started collecting case histories from these parents and, eventually, from teachers who felt the school environment compromised their health. And gradually I started finding bits and pieces about the connection between environmental exposure and brain function—short-term memory loss, the ability to access, store and retrieve information, all of that kind of neurobiology as it related to the environment. 

A short-term memory function determines how long a tabu restriction remains active. This can be expressed as the number of iterations a tabu condition is enforced once it is imposed. 

The purpose of a tabu restriction is to prevent a move from being reversed during the length of the short-term memory, which is a number of future moves specified by the variable tabu size. If, at a given iteration, jobs p(i) and p(j) are swapped, then any move that places job p(i) earlier in the sequence than position i is tabu, until tabu size iterations have occurred or the aspiration level is exceeded. To keep track of which moves are tabu and to free those moves from their tabu status, Laguna et al. define the following data structures... 

Initialize move value matrix Initialize short term memory function... 

Length of short-term memory = tabu size = 3. 

Dunnett, S.B., Evenden, J.L., and Iversen, S.D., Delay-dependent short term memory deficits in aged rats, Psychopharmacology, 96, 174-180, 1982. 

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