Involvement of ventral pallidum in prefrontal cortex-dependent aspects of spatial working memory.
Ventral pallidum (VP) is an important source of limbic input to medial thalamus. Three studies examined the role of VP in spatial memory tasks impaired by medial thalamic lesions. In the 1st study, rats with VP lesions were impaired performing delayed matching trained with retractable levers (DMRL), a measure sensitive to prefrontal (but not hippocampal) damage. The 2nd study demonstrated dose-dependent DMRL impairment following microinjection of gamma-aminobutyric acidA, glutamate, or mu-opioid agonists in VP. In the 3rd study, VP lesions had no effect on varying choice radial-maze delayed nonmatching, a measure sensitive to hippocampal (but not prefrontal) lesions. These results suggest a common role in spatial memory for VP and other components of prefrontal-ventral striatopallidothalamic circuits distinct from hippocampal function.
Zhang
Yueping
Y
Department of Psychology, University of New Hampshire, Durham, NH 03824, USA.
Bailey
Kathleen R
KR
Toupin
Margaret M
MM
Mair
Robert G
RG
D000818:Animals; D005917:Globus Pallidus / Q000473:pathology / Q000502:physiology*; D018698:Glutamic Acid / Q000008:administration & dosage / Q000494:pharmacology; D008297:Male; D008568:Memory / Q000502:physiology*; D051381:Rats; D020318:Rats, Long-Evans; D013028:Space Perception; D013787:Thalamic Nuclei / Q000473:pathology / Q000502:physiology; D005680:gamma-Aminobutyric Acid / Q000008:administration & dosage / Q000494:pharmacology
D018698:Glutamic Acid; D005680:gamma-Aminobutyric Acid