It is a syndrome of unilateral softening of the brain tissue arising from obstruction of the blood vessels of the pons, involving the sixth and seventh cranial nerves and fibers of thecorticospinal tract, and is associated with paralysis of the abducens (including diplopia, internal strabismus, and loss of power to rotate the affected eye outward) and facial nerves andcontralateral hemiplegia of the extremities.
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