[Obsessive-compulsive disorders caused by basal ganglia diseases]

Area of Science:

• Neuroscience
• Neurology
• Psychiatry

Background:

• Bilateral lesions of the lenticular nuclei, specifically the pallidum, have been observed in patients exhibiting obsessive-compulsive behaviors.
• Obsessive-compulsive behaviors can range from meeting diagnostic criteria to elementary stereotyped movements or thoughts.

Purpose of the Study:

• To explore the relationship between lesions in the basal ganglia and the manifestation of obsessive-compulsive behaviors.
• To investigate the role of specific brain circuits, including those involving the striatum, pallidum, and frontal lobes, in the regulation of sensori-motor and mental systems.

Main Methods:

• Utilized CT scan and magnetic resonance imaging to identify lesions in the lenticular nuclei and caudate.
• Employed neuropsychological and metabolic tests to assess the function of frontal circuits.

Main Results:

• Demonstrated a correlation between pallidal lesions and obsessive-compulsive behaviors, which may present in various forms.
• Identified the involvement of striatal and pallidal circuits in sensori-motor and mental regulation, with frontal circuits being particularly important.
• Observed similar behavioral patterns in patients with lesions in the caudate nucleus.

Conclusions:

• Lesions in the basal ganglia, especially the pallidum and caudate, are associated with obsessive-compulsive disorders.
• The findings support the role of basal ganglia and frontal circuits in the pathophysiology of obsessive-compulsive behaviors.
• These insights may help in understanding the mechanisms of obsessive-compulsive disorders and their relation to other neurological conditions.