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排序方式: 共有1115条查询结果,搜索用时 15 毫秒
991.
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RJ Phillips CM Crock MJ Dillon PT Clayton A Curran JI Harper 《Archives of disease in childhood》1993,69(4):446-448
Two infants with a florid erythematous rash and generalised oedema, hypoalbuminaemia, and anaemia were found to have cystic fibrosis. This rare presentation is associated with false negative sweat tests, delays in diagnosis, and a considerable mortality. It is proposed that this presentation represents a manifestation of kwashiorkor secondary to malabsorption. The recognition that these infants have kwashiorkor provides some insight into the pathogenesis and management of their illness. 相似文献
993.
Changes in field potentials and membrane currents in rat sensorimotor cortex following repeated tetanization of the corpus callosum in vivo 总被引:2,自引:1,他引:1
Chapman CA; Trepel C; Ivanco TL; Froc DJ; Wilson K; Racine RJ 《Cerebral cortex (New York, N.Y. : 1991)》1998,8(8):730-742
Repeated, daily tetanization of the corpus callosum induces lasting changes
in sensorimotor cortex field potential responses, but the synaptic
populations that mediate these responses and support long-term potentiation
(LTP) have not been characterized. Current source density analyses of field
responses were compared between control animals and those in which LTP was
induced by 10 daily series of tetanizations. Tetanization and paired-pulse
stimulation (100 ms interval) enhanced the duration of initial
(approximately 3 ms onset) deep-negative population spike activity
generated by a current sink in layer V that peaked repeatedly at a
frequency of approximately 400 Hz. The early (approximately 10 ms to peak)
surface-negative component of field responses was generated by a current
sink in upper layer V and a source in layer VI. This monosynaptic component
followed high stimulation frequencies, recovered quickly from the effects
of anaesthesia, and was enhanced by both tetanization and paired-pulse
stimulation. The late (approximately 20 ms to peak) surface-negative
component was generated by a sink in upper layer V and a source deep in
layer V, and was greatly enhanced by tetanization and paired-pulse
stimulation. The late component did not follow high-frequency stimulation
and recovered slowly from anaesthesia, suggesting that it is driven
polysynaptically. Potentiation of monosynaptic thalamic and
cortico-cortical afferents probably mediates enhancements of the early
component and population spikes, while potentiation of polysynaptic
afferents to layer V may contribute to growth in the late component.
相似文献
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999.
Patellar tendinosis (jumper's knee): findings at histopathologic examination, US, and MR imaging. Victorian Institute of Sport Tendon Study Group 总被引:11,自引:0,他引:11
1000.
Hartemink KJ Wisselink W Rauwerda JA Girbes AR Polderman KH 《Critical care (London, England)》2004,8(5):R343-R346
Therapeutic hypothermia can provide neuroprotection in various situations where global or focal neurological injury has occurred.
Hypothermia has been shown to be effective in a large number of animal experiments. In clinical trials, hypothermia has been
used in patients with postanoxic injury following cardiopulmonary resuscitation, in traumatic brain injury with high intracranial
pressure, in the perioperative setting during various surgical procedures and for various other indications. There is thus
evidence that hypothermia can be effective in various situations of neurological injury, although a number of questions remain
unanswered. We describe three patients with unusual causes of neurological injury, whose clinical situation was in fundamental
aspects analogous to conditions where hypothermia has been shown to be effective. 相似文献