Biomaterial Database

Mutual inhibition between olivary cell groups projecting to different cerebellar microzones in the cat. 1984

G Andersson

This study was carried out predominantly on the b zone in the lateral vermis of the cerebellar anterior lobe. This zone is divided into sagittally oriented microzones which receive a somatotopically organized climbing fibre input. It was shown that the climbing fibre input to one microzone is inhibited by stimulation of a nerve that projects to an adjacent microzone. The degree of inhibition was related to the proximity of the microzones involved. The latency of the inhibition was short and the duration 70-110 ms. The inhibition of climbing fibre responses occurred in the inferior olive and was presumably due to post-synaptic inhibition of the olivo-cerebellar neurones. The mutual inhibition could be produced by antidromic activation of olivo-cerebellar neurones. An inhibition with similar properties as in the b zone, but weaker, was observed between forelimb and hindlimb inputs to the c1 and c3 zones in the pars intermedia. In the c3 zone, an inhibition between adjacent forelimb microzones also occurred.

UI	MeSH Term	Description	Entries
D009412	Nerve Fibers	Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.	Cerebellar Mossy Fibers,Mossy Fibers, Cerebellar,Cerebellar Mossy Fiber,Mossy Fiber, Cerebellar,Nerve Fiber
D009433	Neural Inhibition	The function of opposing or restraining the excitation of neurons or their target excitable cells.	Inhibition, Neural
D009435	Synaptic Transmission	The communication from a NEURON to a target (neuron, muscle, or secretory cell) across a SYNAPSE. In chemical synaptic transmission, the presynaptic neuron releases a NEUROTRANSMITTER that diffuses across the synaptic cleft and binds to specific synaptic receptors, activating them. The activated receptors modulate specific ion channels and/or second-messenger systems in the postsynaptic cell. In electrical synaptic transmission, electrical signals are communicated as an ionic current flow across ELECTRICAL SYNAPSES.	Neural Transmission,Neurotransmission,Transmission, Neural,Transmission, Synaptic
D009847	Olivary Nucleus	A brainstem nuclear complex. in the hindbrain, also referred to as the olivary body. The olivary nuclear complex is a part of the MEDULLA OBLONGATA and the PONTINE TEGMENTUM. It is involved with motor control and is a major source of sensory input to the CEREBELLUM.	Basal Nucleus, Olivary,Nucleus Basalis, Olivary,Olivary Body,Olivary Complex,Olivary Nuclei,Complex, Olivary,Nucleus, Olivary,Nucleus, Olivary Basal,Olivary Basal Nucleus,Olivary Bodies
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
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
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