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[The functional heterogeneity of the human caudate nucleus]
Insights
Surgical removal of caudate nucleus (CN) vascular malformations can lead to distinct postoperative syndromes. Left CN damage, particularly the head, causes perseveration, while right CN damage affects perception.
Area of Science:
- Neuroscience
- Neurosurgery
- Clinical Neurology
Background:
- Vascular malformations of the caudate nucleus (CN) are rare neurological conditions.
- Understanding the neuropsychological sequelae of CN lesions is crucial for patient management.
Purpose of the Study:
- To investigate the clinical-neuropsychological effects of surgical intervention for caudate nucleus vascular malformations.
- To correlate specific lesion locations within the CN with resulting postoperative syndromes.
Main Methods:
- Combined clinical and neuropsychological assessments were conducted on 26 patients pre- and post-surgery.
- Vascular malformation location (head, corpus, or both) was confirmed via CT, angiography, and intraoperative findings.
Main Results:
- Postoperative syndromes were significantly associated with the laterality and specific region of CN damage.
- Left CN lesions, especially in the head, frequently resulted in perseverative syndromes.
- Right CN lesions, particularly involving the corpus, were linked to perceptual disorders and mild semantic/rhythm evaluation deficits.
Conclusions:
- The location and side of vascular malformations within the caudate nucleus predict distinct neuropsychological deficits after surgical removal.
- Targeted surgical approaches and rehabilitation strategies should consider the specific CN region affected.
Abstract:
Combined clinical-neuropsychological investigation of 26 patients with vascular malformations of caudate nucleus (CN) was performed both before and after surgical removal of the malformation. Arterial-venous malformations were located in the head (12 cases) of CN, in its corpus (9 patients), in both head and corpus (5 individuals). Verification of the malformation's location was carried out according to data of computer tomography, angiography, as well as during the operation. It was revealed that postoperative syndromes were closely related in patients with both the side of CN's alteration and with the region of the damage. The clear perseverative syndrome was observed when left CN, and especially its head was damaged. When the corpus of the left CN was damaged perseverations were slighter. Meanwhile faint alienation of the word's meaning as well as the slight alterations of evaluation of rhythm's estimation were observed in such cases. Disorders of the perception were observed mainly when the right CN and especially its corpus was damaged.