<prompt> A 45 years male presents with hypeension. He has sudden abnormal flinging movements in right upper and lower limbs. Most likely site of haemorrhage is :Substantia nigraCaudate nucleiPonsSubthalmic nuclei  <response>: Answer is D Subthalmic Nucleus: The patients abnormal movement is Hemiballismus. Hemiballismus manifests as sudden and often violent flinging movement of a proximal limb usually an arm. Hemiballismus develops due to lesion in the subthalamic nucleus. Remember: Abnormal movement Site of lesion 1. Chorea Caudate nucleus and Putamen striatum 2. Athetosis Lentiform nucleus Globus pal lidus 3. Hemiballismus Subthalamic nucleus 3 4. Parkinsonism Substantia nigra 