Disappearance of essential tremor after frontal cortical infarct

Area of Science:

• Neuroscience
• Neurology
• Movement Disorders

Background:

• Essential tremor (ET) is a common neurological disorder characterized by involuntary rhythmic shaking.
• The exact pathophysiology of ET remains incompletely understood, with various theories involving the cerebellum, thalamus, and cortex.

Observation:

• A patient with a diagnosis of essential tremor experienced a spontaneous remission of symptoms.
• This improvement coincided with the occurrence of a sensorimotor stroke.
• The stroke was attributed to a small cortical infarct located near the left precentral gyrus.

Findings:

• The resolution of essential tremor following a stroke supports the involvement of specific brain circuits.
• Evidence points towards the existence of cortical or transcortical motor loops in the pathophysiology of ET.
• A potential connection between ET and the cerebellar-thalamic-cortical pathway is suggested.

Implications:

• This case provides novel insights into the neural underpinnings of essential tremor.
• The findings may open new avenues for understanding and potentially treating essential tremor.
• Further research into motor loop dysfunction could lead to targeted therapeutic strategies for ET.