Memory impairment following right cerebellar infarction: a case study.

Area of Science:

• Neuroscience
• Neurology

Background:

• Cerebellar Cognitive Affective Syndrome (CCAS) is linked to cerebellar lesions.
• The proposed mechanism for CCAS involves deactivation of the contralateral prefrontal cortex via cerebello-cerebral pathway disconnections.

Observation:

• A patient with right cerebellar infarction presented with anterograde amnesia.
• The patient's episodic memory impairment did not align with the typical CCAS mechanism involving prefrontal cortex lesions.

Findings:

• Single-photon emission computed tomography revealed hypoperfusion in the right cerebellar hemisphere and left anterior thalamus.
• The memory deficit pattern resembled diencephalic amnesia.

Implications:

• Episodic memory impairment in cerebellar infarction may involve thalamic dysfunction.
• The thalamus acts as a critical relay center in cerebello-cerebral connectivity networks, influencing memory.
• This suggests a revised understanding of cerebellar cognitive disorders and their underlying neural circuitry.