L Y Wong

Publications (2)1.52 Total impact

• Source

  Available from: hkmj.org

  Article: Epidemiology of headache in Hong Kong primary-level schoolchildren: questionnaire study.

  C K Kong, W W Cheng, L Y Wong
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  ABSTRACT: To collect and analyse epidemiological data on childhood headache in the Hong Kong community. Questionnaire study. Three primary schools, Hong Kong. Two thousand, one hundred and twenty pupils from 2156 replied to the questionnaire survey. One hundred and twenty-four pupils who were identified to have suspected recurrent headache were invited to a follow-up medical consultation. Age-groups and prevalence of tension-type and migraine headache, using the diagnostic criteria of the International Headache Society. The overall prevalence of headache in the 2120 respondents was 2.8%. The prevalence of tension-type headache, migraine, probable migraine, and unclassified headache were 1.2%, 0.5%, 0.7%, and 0.5%, respectively. The age-specific prevalence of headache from the age of 6 to 13 years showed a steadily increasing trend from childhood to the early teens. Headache is a common complaint for children, although it may be underrecognised. Further study will be beneficial for providing better management of headache in this population.
  Hong Kong medical journal = Xianggang yi xue za zhi / Hong Kong Academy of Medicine 04/2001; 7(1):29-33.
• Article: Visual field plasticity in a female with right occipital cortical dysplasia.

  C K Kong, L Y Wong, M K Yuen
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  ABSTRACT: Brain plasticity refers to its ability to recover after damage. Visual field plasticity is not well recognized. We report a 12-year-old female who first presented with recurrent seizures and was subsequently found to have a large, right occipital cortical dysplasia on magnetic resonance imaging. Her visual field by Goldmann perimetry was totally normal. Visual-evoked potential studies revealed the left hemifield P100 response was detected maximally at the right temporal and parietal regions. A weak but reproducible right hemifield P100 response was located at the right medial skull base. Functional magnetic resonance imaging with flashlight stimulation revealed cerebral activity mainly at the right posterior temporal and parietal lobes and left occipital lobe. These studies suggested that the left hemifield function was located at the right posterior temporal and parietal lobes. The left occipital lobe may also have been reorganized, with a P100 vector pointing out from its inferiomedial base. We reviewed other related reported cases. We believe that visual-evoked potential studies and visual functional magnetic resonance imaging should be performed more liberally for recognition of visual field plasticity.
  Pediatric Neurology 10/2000; 23(3):256-60. · 1.52 Impact Factor