01807nas a2200229   4500008004100000022001400041245014300055210006900198260001200267300001400279490000700293520108100300653001701381653002701398653001901425653001901444653001201463100002101475700001901496700001501515856004701530       1989                        eng d  a0197-846200aChronic exposure of primates to 60-Hz electric and magnetic fields: I. Exposure system and measurements of general health and performance.0 aChronic exposure of primates to 60Hz electric and magnetic field  c01/1989  a277–2880 v103 aWe exposed pigtailed macaques (Macaca nemestrina) to electric (E) and magnetic (B) fields at strengths of 3 kV/m and 0.1 G, 10 kV/m and 0.3 G, and 30 kV/m and 0.9 G for three 21 day segments. These three exposure segments were preceded and followed by 21 day sham exposure segments. Additional animals received only sham exposure for five 21 day segments. Detailed description of the exposure chamber and field generation apparatus is given. We evaluated measures of animal well-being, including weight, blood chemistry, blood cell counts, and performance on a simple motor task, and performed postmortem examinations. Reliable and consistent results were obtained throughout data collection. None of the measures evaluated was significantly affected by E- and B-field exposures. Data obtained during actual exposure segments were not distinguishable from those obtained during the initial and final sham exposure segments, nor were they different from data obtained from the sham-exposed animals. Thus, field exposure had no apparent effects on general health or performance.10a60-Hz fields10acentral nervous system10aelectric field10amagnetic field10aprimate1 aWolpaw, Jonathan1 aSeegal, R., F.1 aDowman, R.  uhttp://www.ncbi.nlm.nih.gov/pubmed/275170201114nas a2200265   4500008004100000022001400041245005400055210005300109260001200162300001400174490000800188520041600196653001300612653001100625653001500636653001200651653001800663653001900681100002100700700002000721700001900741700002100760700002000781856004700801       1983                        eng d  a0006-899300aAdaptive plasticity in the spinal stretch reflex.0 aAdaptive plasticity in the spinal stretch reflex  c05/1983  a196–2000 v2673 aMonkeys can change the amplitude of the spinal stretch reflex without change in initial alpha motor neuron tone, as measured by EMG, or in initial muscle length. Change is apparent in 5-10 days, continues to develop over weeks, and persists during inactive periods. Spinal stretch reflex change may be a valuable system for studying the neuronal and synaptic bases of an adaptive change in primate CNS function.10aLearning10aMemory10aplasticity10aprimate10aspinal reflex10astretch reflex1 aWolpaw, Jonathan1 aKieffer, V., A.1 aSeegal, R., F.1 aBraitman, D., J.1 aSanders, M., G.  uhttp://www.ncbi.nlm.nih.gov/pubmed/686094801145nas a2200229   4500008004100000022001400041245004900055210004800104260001200152300001400164490000800178520053400186653002100720653001900741653001900760653001200779653001800791653001900809100002100828700001900849856004700868       1982                        eng d  a0006-899300aDiurnal rhythm in the spinal stretch reflex.0 aDiurnal rhythm in the spinal stretch reflex  c07/1982  a365–3690 v2443 aWe studied primate spinal stretch reflex (SSR) amplitude as a function of time of day. SSR amplitude was greatest around midnight and smallest around noon. The diurnal rhythm was not simply a function of number of trials, or of the lighting cycle. This rhythm offers an opportunity to study the neuronal and synaptic mechanisms producing a diurnal change in CNS function. Its existence indicates that the CNS response to a given limb disturbance, and thus the CNS activity underlying a given performance, varies with time of day.10acircadian rhythm10adiurnal rhythm10amuscle stretch10aprimate10aspinal reflex10astretch reflex1 aWolpaw, Jonathan1 aSeegal, R., F.  uhttp://www.ncbi.nlm.nih.gov/pubmed/6889452