PubMed · 16428377
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
M Irani. 2006. First, do no harm.. https://pubmed.ncbi.nlm.nih.gov/16428377/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Neurological injuries produced by explosive blasts are the result of a cascade of events that begin with the initial explosion and evolve from the secondary, tertiary, and quaternary effects that the explosion engenders [Lavonis EJ. Blast Injuries. EMedicine.htm]. Only the results of the primary blast are predictable, and subsequent actions ripple outward in an increasingly random and chance sequence. This article reviews and explains how the ensuing chain of circumstances injures the nervous system, and what examining physicians should anticipate when they treat these patients.
Traumatic isolated oculomotor nerve palsy is not common. Oculomotor nerve palsy without internal ophthalmoplegia (pupil sparing) is extremely rare. We report a case of this condition in a child. An 11-year-old boy was transferred to our hospital after a head injury in a traffic accident. Neuro-ophthalmic examination showed that the left eye had limited adduction, supraduction, and infraduction, incomplete convergence and left ptosis, but no internal ophthalmoplegia. Magnetic resonance imaging indicated mild bending of the ipsilateral oculomotor nerve at the posterior petroclinoid ligament. One month after injury, movement of the patient's eyes was normal on examination, but there was mild diplopia. The suggested mechanism of the oculomotor nerve palsy with pupil sparing in this case is stretching of the oculomotor nerve at the posterior petroclinoid ligament, maintaining an intact pupillomotor nerve.
Executive actions are represented and hierarchically organized in the cortex of the frontal lobe. The representation and coordination of an action or series of actions have the same anatomical substrate: an executive neuronal network (cognit) in forntal cortex. That network interacts structurally and dynamically with perceptual networks of posterior cortex at the highest levels of the perception-action cycle.