Biomaterial Database

[Effect of harmaline on firing pattern of rat cerebellar Purkinje cells in ontogenesis]. 2008

T V Karelina

In this work, responses of rat Purkinje cells to intraperitoneal administration of the hallucinogenic alkaloid harmaline (0.15 mg/kg) were studied in the course of ontogenesis. The experiments were carried out on Wistar rats of three age groups: rat pups (13-18 days), adult animals (2-7 months), and aged rats (25-36 months). In Purkinje cell firings, two types of electric reactions were revealed; they were similar in all age group of the animals. In cells with the 1st type of reactions, in response to the harmaline administration there was recorded a significant increase of frequency of complex spikes, accompanied by disappearance of simple spikes. In the activity of Purkinje cells of the 2nd type, the complex spike frequency also increased; however, the firing simple spikes were preserved, although with a decrease of their frequency as compared with norm. Essential changes of activity of the cerebellar Purkinje cells were found in the rat pups and aged animals in comparison with adult rats, which agrees well with immaturity of various cerebellar structures in the first case and with involutionary changes in the second case.

UI	MeSH Term	Description	Entries
D011689	Purkinje Cells	The output neurons of the cerebellar cortex.	Purkinje Cell,Purkinje Neuron,Purkyne Cell,Cell, Purkinje,Cell, Purkyne,Cells, Purkinje,Cells, Purkyne,Neuron, Purkinje,Neurons, Purkinje,Purkinje Neurons,Purkyne Cells
D002531	Cerebellum	The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills.	Cerebella,Corpus Cerebelli,Parencephalon,Cerebellums,Parencephalons
D006246	Harmaline	A beta-carboline alkaloid isolated from seeds of PEGANUM.	3H-Pyrido(3,4-b)indole, 4,9-dihydro-7-methoxy-1-methyl-,Dihydroharmine,Harmidine
D000375	Aging	The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.	Senescence,Aging, Biological,Biological Aging
D000697	Central Nervous System Stimulants	A loosely defined group of drugs that tend to increase behavioral alertness, agitation, or excitation. They work by a variety of mechanisms, but usually not by direct excitation of neurons. The many drugs that have such actions as side effects to their main therapeutic use are not included here.	Analeptic,Analeptic Agent,Analeptic Drug,Analeptics,CNS Stimulant,CNS Stimulants,Central Nervous System Stimulant,Central Stimulant,Analeptic Agents,Analeptic Drugs,Central Stimulants,Agent, Analeptic,Agents, Analeptic,Drug, Analeptic,Drugs, Analeptic,Stimulant, CNS,Stimulant, Central,Stimulants, CNS,Stimulants, Central
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
D017208	Rats, Wistar	A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.	Wistar Rat,Rat, Wistar,Wistar Rats
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus