Mohit Agarwal MD, Abstract Co-Author: Nothing to Disclose

John L. Ulmer MD, Abstract Co-Author: Stockholder, Prism Clinical Imaging, Inc Medical Advisory Board, General Electric Company

Andrew Paul Klein MD, Presenter: Nothing to Disclose

Tushar Chandra MD, Abstract Co-Author: Nothing to Disclose

Leighton P. Mark MD, Abstract Co-Author: Nothing to Disclose

1. Revisit the functional pathways that control eye movements 2. Identify them on cross sectional brain MR images 3. Discuss effects of lesion location, laterality and hemispheric dominance on deficits and recoverability  

The precise, symmetric and synchronous movements of the eyes is accomplished by perfect coordination of six sets of extraocular muscles controlled by three pairs of cranial nerves. Voluntary focusing of the eye to search the environment and maintain clear view of stationary or moving objects, near or far, is meticulously controlled by centers in the frontal and parietal lobes, brainstem, cerebellum, and upper spinal cord. Maintenance of clear images during head movement brings about vestibular influences and ocular reflex pathways as well. The extent to which injury to nuclear and supranuclear structures can impair eye movements depends on lesion location, laterality, and hemispheric dominance. Knowledge of these substrates and their location on cross-sectional imaging can be useful in guiding search patterns and in clinico-radiological correlation. In this exhibit, functional pathways which control eye movements are identified on cross-sectional MRI and correlated with function, deficits, and recoverability. 

http://abstract.rsna.org/uploads/2014/14019091/14019091_qssq.pdf

Agarwal, M, Ulmer, J, Klein, A, Chandra, T, Mark, L, Ocular Movements: More than Meets the Eye.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14019091.html