A lacunar infarct to the ventral posterior nuclei can lead to a pure sensory stroke. The ventral posterior lateral nucleus is responsible for sensory information of the arm and leg. While the ventral posterior medical nucleus is responsible for sensory information of the face. Lacunar infarcts may have a sudden onset; however, it is also likely to manifest in stepwise progression. These patients will report numbness and tingling contralateral to the lesion. Paradoxical pain can develop in the location of sensory impairment after infarct. This phenomenon is known as the thalamic pain syndrome.