Keeping memory clear and stable--the contribution of human basal ganglia and prefrontal cortex to working memory.
Successful remembering involves both hindering irrelevant information from entering working memory (WM) and actively maintaining relevant information online. Using a voxelwise lesion-behavior brain mapping approach in stroke patients, we observed that lesions of the left basal ganglia render WM susceptible to irrelevant information. Lesions of the right prefrontal cortex on the other hand make it difficult to keep more than a few items in WM. These findings support basal ganglia-prefrontal cortex models of WM whereby the basal ganglia play a gatekeeper role and allow only relevant information to enter prefrontal cortex where this information then is actively maintained in WM.
Baier
Bernhard
B
Department of Neurology, University of Mainz, 55131 Mainz, Germany. baierb@uni-mainz.de
Karnath
Hans-Otto
HO
Dieterich
Marianne
M
Birklein
Frank
F
Heinze
Carolin
C
Müller
Notger G
NG
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001479:Basal Ganglia / Q000502:physiology*; D001931:Brain Mapping; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008569:Memory Disorders / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D008570:Memory, Short-Term / Q000502:physiology*; D008875:Middle Aged; D017397:Prefrontal Cortex / Q000502:physiology*; D011699:Putamen / Q000502:physiology / Q000503:physiopathology; D020521:Stroke / Q000150:complications / Q000473:pathology / Q000503:physiopathology*