Cerebellar Atrophy in Cortical Myoclonic Tremor and Not in Hereditary Essential Tremor-a Voxel-Based Morphometry Study

A W G Buijink, Marja Broersma, A M M van der Stouwe, S Sharifi, M A J Tijssen, J D Speelman, N M Maurits, A F van Rootselaar

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)
260 Downloads (Pure)

Abstract

Essential tremor (ET) presumably has a cerebellar origin. Imaging studies showed various cerebellar and also cortical structural changes. A number of pathology studies indicated cerebellar Purkinje cell pathology. ET is a heterogeneous disorder, possibly indicating different underlying disease mechanisms. Familial cortical myoclonic tremor with epilepsy (FCMTE), with evident Purkinje cell degeneration, can be an ET mimic. Here, we investigate whole brain and, more specifically, cerebellar morphological changes in hereditary ET, FCMTE, and healthy controls. Anatomical magnetic resonance images were preprocessed using voxel-based morphometry. Study 1 included voxel-wise comparisons of 36 familial, propranolol-sensitive ET patients, with subgroup analysis on age at onset and head tremor, and 30 healthy controls. Study 2 included voxel-wise comparisons in another nine ET patients, eight FCMTE patients, and nine healthy controls. Study 3 compared total cerebellar volume between 45 ET patients, 8 FCTME patients, and 39 controls. In our large sample of selected hereditary ET patients and ET subgroups, no local atrophy was observed compared to healthy controls or FCMTE. In ET patients with head tremor, a volume increase in cortical motor regions was observed. In FCMTE, a decrease in total cerebellar volume and in local cerebellar gray matter was observed compared to healthy controls and ET patients. The current study did not find local atrophy, specifically not in the cerebellum in hereditary ET, contrary to FCMTE. Volume increase of cortical motor areas in ET patients with head tremor might suggest cortical plasticity changes due to continuous involuntary head movements.

Original languageEnglish
Pages (from-to)696-704
Number of pages9
JournalCerebellum
Volume15
Issue number6
DOIs
Publication statusPublished - Dec-2016

Keywords

  • Essential tremor
  • MRI
  • VBM
  • Volumetry
  • FCMTE
  • Cerebellum
  • GRAY-MATTER
  • EPILEPSY
  • DYSFUNCTION
  • DISORDER
  • DISEASE
  • SPECTROSCOPY
  • STIMULATION
  • VOLUME

Cite this