Expected Clinical Symptoms
Based on the imaging findings showing multiple acute infarcts in the left cerebellar hemisphere, left thalamus, left capsuloganglionic region, left medial temporoparietal lobe, and peri-trigonal region, this patient would be expected to present with a combination of right-sided motor weakness, sensory deficits, ataxia, vertigo, and potential cognitive/language disturbances.
Symptom Profile by Anatomical Location
Left Cerebellar Hemisphere Infarction
The cerebellar involvement would produce:
- Vertigo and lateropulsion (most common symptoms in cerebellar infarction, present in 87% and 82% respectively) 1
- Ipsilateral limb ataxia affecting right-sided coordination 1
- Gait instability with tendency to fall toward the right side
- Nystagmus (particularly with caudal vermis involvement) 1
- Dysarthria if anterior paravermis is affected 1
Notably, isolated vertigo or lateropulsion without other symptoms occurs in 38% of cerebellar infarct patients, while limb ataxia is only present in 40% 1. The specific lobular involvement determines symptom severity 2.
Left Thalamus Infarction
Thalamic involvement produces:
- Right-sided sensory loss (contralateral to lesion) from disruption of thalamocortical sensory pathways
- Potential cognitive impairment including confusion and memory deficits
- Possible altered consciousness depending on extent
Left Capsuloganglionic Region Infarction
This location affects the internal capsule and basal ganglia, causing:
- Right-sided hemiparesis (pure motor deficit from corticospinal tract involvement) 3
- Right-sided sensory deficits if posterior limb is involved 4
- Potential cognitive symptoms including confusion and word-finding difficulty, particularly with caudate involvement 4
Left Medial Temporoparietal and Peri-trigonal Region Infarction
This cortical involvement would produce:
- Language dysfunction (aphasia) - expressive, receptive, or mixed depending on exact location 3
- Right visual field deficits (right homonymous hemianopsia) 3
- Right-sided sensory neglect (parietal involvement)
- Memory impairment (temporal lobe involvement)
EEG Findings: Left Temporal Theta Slowing
The occasional left temporal theta slowing indicates:
- Focal cortical dysfunction in the left temporal region
- Correlates with the structural damage seen on MRI
- May predispose to seizure activity, though not necessarily present acutely
Integrated Clinical Presentation
The most likely clinical picture combines:
- Right hemiparesis (face, arm, leg weakness)
- Right hemisensory loss (numbness, decreased sensation)
- Aphasia (difficulty speaking or understanding language)
- Right visual field cut
- Vertigo and imbalance (cerebellar component)
- Right-sided ataxia (incoordination beyond weakness)
- Cognitive impairment (confusion, memory problems)
Critical Considerations
Multiple vascular territory involvement suggests either:
- Cardioembolic source (most likely given scattered distribution) 5
- Large vessel disease with multiple emboli
- Hypercoagulable state
The absence of flow-limiting stenosis on MRA makes large vessel atherosclerotic disease less likely and strongly suggests a cardioembolic mechanism 5. This patient requires urgent cardiac evaluation including prolonged rhythm monitoring and echocardiography to identify the embolic source 6.
Symptom severity depends on infarct size within each territory. Small infarcts may produce subtle deficits that could be missed on routine examination, emphasizing the need for formal stroke scale assessment (NIHSS) 7.
The combination of motor, sensory, cerebellar, and cognitive symptoms from multiple left-sided lesions creates a complex neurological syndrome requiring comprehensive rehabilitation addressing motor recovery, balance training, speech therapy, and cognitive rehabilitation 8.