TABLE 5.

Predictions of the SEC/OCD Model for Idiopathic OCD and Symptoms of OCD Acquired from Brain Lesions

	Idiopathic OCD	OCD Symptoms Secondary to PFC Damage	OCD Symptoms Secondary to Basal Ganglia Damage
Type of repetitive behavior	Complex	Simple and complex	Simple and complex
Executive dysfunction	Less	Yes	Less
Performance of SECs	Intact	Impaired	Intact
Anxiety	Yes	No	Less
Obsessions	Yes	No	Less
Associated with motor tics	Yes	No	Yes
Functional imaging	↑ tracer uptake in OFC, caudate, ACC	↓ tracer uptake in OFC, caudate, ACC	↓ tracer uptake in basal ganglia (esp. caudate), ↑ in OFC

SEC = structured event complexes; OCD = obsessive-compulsive disorder; OFC = orbitofrontal cortex; ACC = anterior cingulate cortex; PFC = prefrontal cortex