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Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia

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Thalamic chronotaraxis: isolated time disorientation.

Emre Kumral¹, Halil Gulluoglu, Banu Dramali

¹Cerebrovascular Unit, Department of Neurology, Ege University, Bornova, Izmir, 35100, Turkey. emre.kumral@ege.edu.tr

Journal of Neurology, Neurosurgery, and Psychiatry

|July 20, 2007

Summary

Acute thalamic stroke can cause chronotaraxis, or time disorientation. This study links this specific symptom to thalamic lesions, particularly in the mediodorsal nucleus, and suggests good recovery potential.

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Area of Science:

Neurology
Neuroscience
Neuroimaging

Background:

Acute isolated disorientation of time, known as chronotaraxis, is a rare symptom of thalamic stroke.
Previous reports have not detailed acute thalamic chronotaraxis with associated Magnetic Resonance Imaging (MRI) findings.

Observation:

This study describes five patients presenting with chronotaraxis following a thalamic stroke.
The patients exhibited disorientation regarding the date, inability to ascertain the current time, and inaccurate estimation of elapsed time.

Findings:

Four percent (5 out of 120) of patients with ischemic thalamic stroke experienced isolated time disorientation.
Patients described this as 'time blindness,' indicating a profound inability to estimate or guess the correct time.

Implications:

Acute thalamic chronotaraxis is a distinct clinical syndrome associated with small artery disease affecting the mediodorsal nucleus of the thalamus.
This clinical presentation appears to have a favorable prognosis for recovery.