Biomaterial Database

[Electroencephalographic analysis of wakefulness and the primary form of sleep in the frog, Rana temporaria]. 1978

S G Lazarev

EEG spectral and correlation analyses data were obtained on the forebrain and midbrain during active wakefulness and under sleep-like conditions (primary sleep) in frogs. Autocorrelation analysis indicates that the degree of EEG stability and the content of periodic waves in the EEG during wakefulness and primary sleep are rather low. Cross-correlation connection between the bioelectrical activity in the forebrain primordial hippocamp and midbrain tectum was found to be rather poor. At the background of EEG of primary sleep in the midbrain (and to a lower extent--in the forebrain) spike-like activity was observed which is absent in the wake animals. It is suggested that EEG patterns of primary sleep and wakefulness are essentially different. Possibility of onset of specific electroencephalographic arousal reaction against the background of primary sleep (which differs from that in warm-blooded animals) is noted.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008636	Mesencephalon	The middle of the three primitive cerebral vesicles of the embryonic brain. Without further subdivision, midbrain develops into a short, constricted portion connecting the PONS and the DIENCEPHALON. Midbrain contains two major parts, the dorsal TECTUM MESENCEPHALI and the ventral TEGMENTUM MESENCEPHALI, housing components of auditory, visual, and other sensorimoter systems.	Midbrain,Mesencephalons,Midbrains
D011896	Rana temporaria	A species of the family Ranidae occurring in a wide variety of habitats from within the Arctic Circle to South Africa, Australia, etc.	European Common Frog,Frog, Common European,Common European Frog,Common Frog, European,European Frog, Common,Frog, European Common
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D004569	Electroencephalography	Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.	EEG,Electroencephalogram,Electroencephalograms
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001001	Anura	An order of the class Amphibia, which includes several families of frogs and toads. They are characterized by well developed hind limbs adapted for jumping, fused head and trunk and webbed toes. The term "toad" is ambiguous and is properly applied only to the family Bufonidae.	Bombina,Frogs and Toads,Salientia,Toad, Fire-Bellied,Toads and Frogs,Anuras,Fire-Bellied Toad,Fire-Bellied Toads,Salientias,Toad, Fire Bellied,Toads, Fire-Bellied
D012890	Sleep	A readily reversible suspension of sensorimotor interaction with the environment, usually associated with recumbency and immobility.	Sleep Habits,Sleeping Habit,Sleeping Habits,Habit, Sleep,Habit, Sleeping,Habits, Sleep,Habits, Sleeping,Sleep Habit
D014851	Wakefulness	A state in which there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.	Wakefulnesses