Thalamic Infarction Imaging and Clinical Outcomes
Summary
Thalamic infarction arises when blood flow to discrete thalamic vascular territories is disrupted, leading to a range of neurological deficits that can include altered consciousness, vertical gaze palsy, memory impairment and cognitive disturbance. Modern imaging techniques—chiefly diffusion-weighted MRI, perfusion imaging and CT perfusion—have revolutionised early detection by revealing characteristic signal changes in paramedian and anterior thalamic nuclei, with or without midbrain involvement. Precise identification of infarct patterns guides acute reperfusion strategies, informs prognosis and shapes rehabilitation pathways. Clinical outcomes are frequently assessed using the modified Rankin Scale and detailed neuropsychological testing, emphasising functional recovery and long-term cognitive sequelae. Improved understanding of thalamic vascular anatomy, notably variants such as the artery of Percheron, has elevated global stroke care by reducing diagnostic delays and optimising time-sensitive interventions.
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Thalamic Infarction Imaging and Clinical Outcomes publication trend
The graph below shows the total number of articles in thalamic infarction imaging and clinical outcomes across all publications each year (not limited to Nature Index journals).
Technical terms
Thalamus: Bilateral grey-matter nuclei that relay sensory and motor signals and regulate consciousness.
Artery of Percheron: A solitary thalamoperforating arterial trunk supplying both paramedian thalami and sometimes rostral midbrain.
Diffusion-weighted imaging (DWI): MRI sequence detecting acute ischaemia by restricted water diffusion in infarcted tissue.
Modified Rankin Scale (mRS): Six-point scale measuring degree of disability or dependence after stroke.
FLAIR “V sign”: A V-shaped hyperintensity on fluid-attenuated inversion recovery MRI indicating midbrain involvement in bilateral thalamic infarcts.
References
- Artery of Percheron Infarction: Imaging Patterns and Clinical Spectrum. American Journal of Neuroradiology (2010).
- Thalamic Lesions: A Radiological Review. Behavioural Neurology (2014).
- Artery of Percheron infarction with persistent amnesia: a case report of bilateral paramedian thalamic syndrome. BMC Neurology (2020).
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