A patient presents with pure sensory or sensorimotor syndrome, plus memory impairment, aphasia or neglect, and apathy. Which syndrome is most likely?

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Multiple Choice

A patient presents with pure sensory or sensorimotor syndrome, plus memory impairment, aphasia or neglect, and apathy. Which syndrome is most likely?

Lesions in the thalamus can produce a pattern that includes sensory loss with broader cognitive and affective changes because the thalamus relays sensory information and connects with frontal and limbic circuits. When the ventral posterior nuclei (VPL and VPM) are affected, you get contralateral pure sensory loss or a sensory-motor syndrome. But involvement of other thalamic nuclei, such as the dorsomedial and anterior nuclei, disrupts circuits that subserve memory, motivation, and executive function, leading to memory impairment and apathy, and, depending on the hemisphere involved, aphasia or neglect. This combination of sensory disturbance with cognitive/behavioral symptoms is characteristic of thalamic syndrome. Thalamic pain syndrome is a related variant focused on central pain, while Weber's and Top of Basilar syndromes involve motor pathways or brainstem/cortical signs rather than this sensory-plus-cognitive pattern. Therefore, the most likely syndrome is thalamic syndrome.

Lesions in the thalamus can produce a pattern that includes sensory loss with broader cognitive and affective changes because the thalamus relays sensory information and connects with frontal and limbic circuits. When the ventral posterior nuclei (VPL and VPM) are affected, you get contralateral pure sensory loss or a sensory-motor syndrome. But involvement of other thalamic nuclei, such as the dorsomedial and anterior nuclei, disrupts circuits that subserve memory, motivation, and executive function, leading to memory impairment and apathy, and, depending on the hemisphere involved, aphasia or neglect. This combination of sensory disturbance with cognitive/behavioral symptoms is characteristic of thalamic syndrome. Thalamic pain syndrome is a related variant focused on central pain, while Weber's and Top of Basilar syndromes involve motor pathways or brainstem/cortical signs rather than this sensory-plus-cognitive pattern. Therefore, the most likely syndrome is thalamic syndrome.

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