A long history of studies have suggested that the rostral hypothalamus promotes sleep, while the caudal hypothalamus promotes waking. My research advisor recently identified neurons in the ventrolateral preoptic area (VLPO) that may subserve the rostral hypothalamic sleep-promoting role. These neurons send inhibitory projections to a caudal hypothalamic structure, the tuberomammillary nucleus (TMN). The role of the TMN is unclear, but we propose that it promotes waking, and that it in turn sends inhibitory projections to the VLPO, thus defining a circuit with mutual antagonism between sleep and wake-promoting structures. This model suggests that the sleep-wake state is defined by a pair of competing neural systems, and has implications for disorders of sleep-wake regulation such as narcolepsy.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Predoctoral Individual National Research Service Award (F31)
Project #
5F31MH012370-02
Application #
6185273
Study Section
Special Emphasis Panel (ZRG1-IFCN-3 (01))
Program Officer
Chavez, Mark
Project Start
2000-05-01
Project End
Budget Start
2000-05-01
Budget End
2001-04-30
Support Year
2
Fiscal Year
2000
Total Cost
$22,970
Indirect Cost
Name
Beth Israel Deaconess Medical Center
Department
Type
DUNS #
076593722
City
Boston
State
MA
Country
United States
Zip Code
02215