This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
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 : 
Select and explain. 
A. Substantia nigra, B. Caudate nuclei, C. Pons, D. Subthalmic nuclei
D: Subthalmic nuclei
Answer: D: Subthalmic nuclei 
Explanation: Answer is D (Subthalmic Nucleus): The patient's 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