Oligodendrocytes in the central nervous system (CNS) produce myelin sheaths that insulate axons to ensure fast propagation of action potentials. beta1 integrins regulate the myelination of peripheral nerves, but their function during the myelination of axonal tracts in the CNS is unclear. Here we show that genetically modified mice lacking beta1 integrins… (More)
Non-peptide receptor ligands with differential affinity for the angiotensin II-1 (AII-1) receptor (EXP3312, EXP3880) or the AII-2 receptor (PD123177) and an angiotensin converting enzyme (ACE) inhibitor captopril were evaluated for the ability to protect against a renin-induced performance deficit in a passive avoidance (PA) task in rats. The ability to… (More)
The 5-HT antagonists ketanserin, mianserin, methysergide, and cyproheptadine and the 5-HT uptake inhibitors fluoxetine and zimeldine were evaluated for their ability to protect against an hypoxia-induced performance deficit in a passive avoidance (PA) task. The ability to retain a PA response was found to decrease as the oxygen concentration decreased with… (More)
The indications and operative technique of various procedures commonly used to provide or increase access to the central skull base, anterior and middle cranial fossae, nasopharynx, infratemporal fossa and retromaxillary space are discussed with illustrative cases.
DuP 996 and ketanserin have previously been shown to protect against experimentally induced passive avoidance (PA) deficits. In the present experiment the potential interaction between DuP 996 and ketanserin on hypoxia-induced amnesia was evaluated. Exposure to hypoxia (6.5% oxygen) produced a reliable deficit in PA retention which was attenuated by… (More)
DuP 996, 3,3-bis(4-pyrindinylmethyl)-1-phenylindolin-2-one, physostigmine (PH), tetrahydroaminoacridine (THA) and 3,4-diaminopyridine (3,4-DAP) were compared for their ability to protect against hypoxia-induced performance deficits in a passive avoidance (PA) task. The ability to retain PA response was found to decrease as the oxygen concentration decreased… (More)