<prompt> Bilateral Babinski sign is characteristic of:Pontine hemorrhageBasal ganglia and thalamic hemorrhageCerebellar hemorrhageSubarachnoid hemorrhage  <response>: Ans. a. Pontine hemorrhage Ref: Harrison 19e p2583, 209, 18e p3286-3287Features of Pontine StrokeSudden onsetDeep coma with quadriplegia usually occurs over few minutesPinpoint pupil 1 mm pupils that react to lightLoss of reflex eye movements and corneal responsesDecerebrate rigidityPosturingHyperpneaHyperventilationSevere hypertensionOcular bobbingExcessive sweatingHyperhidrosisHyperpyrexiaPontine StrokesVentral pontine syndrome Millard Gubler syndromeLower dorsal pontine syndrome Fovilles syndromeUpper dorsal pontine syndrome Raymond ceston syndrome Caused by paramedian infarction of pons Caused by lesion is dorsal tegmentum of lower pons Caused by obstruction of long circumferential branches of basilar artery 