Understanding Neurology

Disorders of motility 175REVISION QUESTIONS1 Parkinson’s disease typically presents withunilateral postural arm tremor.2 Essential tremor typically presents with bilateralpostural arm tremor.3 Huntington’s disease is inherited in anautosomal recessive manner.4 Wilson’s disease often presents in patients agedover 50 years.5 A fine bilateral postural arm tremor can becaused by sodium valproate.6 An ischaemic lesion in the subthalamic nucleuscould be the cause of acute onset hemiballism.7 Imaging of the presynaptic dopaminergicneurone is expected to be abnormal in essentialtremor.8 Everybody with chorea should undergo genetictesting for Huntington’s disease.9 Thyroid function tests are indicated in a patientpresenting with bilateral postural tremor andweight loss.10 Structural brain imaging is not indicated whenpyramidal signs (e.g. hyper-reflexia and extensorplantars) are found in conjunction withparkinsonian signs.11 Antiemetic medications may cause parkinsonism.12 Dopamine-depleting medications may causeHuntington’s disease.13 Beta-blockers may cause tremor.14 Lithium may cause tremor.15 Essential tremor responds to levodopa.Answers1 False.2 True.3 False.4 False.5 True.6 True.7 False.8 False.9 True.10 False.11 True.12 False.13 False.14 True.15 False.