Biomaterial Database

[Convergence of reticulo-, vestibulo- and rubrospinal influences on motor neurons of the cervical region of the cat spinal cord]. 1978

N I Gaĭdaĭ

Intracellular recording of synaptic potentials of 93 cervical motoneurons was performed in cats under stimulation of medial longitudinal fasciculus, Deiters vestibular nucleus and red nucleus. Under stimulation of medial longitudinal fasciculus and Deiters nucleus in motoneurons of the forelimb muscles distal groups excitatory reactions were predominant and in motoneurons of proximal extensors inhibitory reactions prevailed. When stimulating the red nucleus excitatory and inhibitory reactions were recorded almost in equal number of cells independently of functional significance of corresponding muscles. Monosynaptic EPSPs were recorded in 1/5 of motoneurons under stimulation of the medial longitudinal fasciculus and only in several cases during stimulation of vestibular and red nuclei. In the other cases stimulation of the structures investigated caused polysynaptic reactions in motoneurons which arose after a series of 2-3 stimuli. In 62% of motoneurons when stimulating different structures under study the reactions were of the same direction. The mutual facilitation of reactions was revealed under stimulation of different inputs. The data obtained show that interaction of influences of the studied structures occurs to a considerable extent at the level of spinal interneurons.

UI	MeSH Term	Description	Entries
D008564	Membrane Potentials	The voltage differences across a membrane. For cellular membranes they are computed by subtracting the voltage measured outside the membrane from the voltage measured inside the membrane. They result from differences of inside versus outside concentration of potassium, sodium, chloride, and other ions across cells' or ORGANELLES membranes. For excitable cells, the resting membrane potentials range between -30 and -100 millivolts. Physical, chemical, or electrical stimuli can make a membrane potential more negative (hyperpolarization), or less negative (depolarization).	Resting Potentials,Transmembrane Potentials,Delta Psi,Resting Membrane Potential,Transmembrane Electrical Potential Difference,Transmembrane Potential Difference,Difference, Transmembrane Potential,Differences, Transmembrane Potential,Membrane Potential,Membrane Potential, Resting,Membrane Potentials, Resting,Potential Difference, Transmembrane,Potential Differences, Transmembrane,Potential, Membrane,Potential, Resting,Potential, Transmembrane,Potentials, Membrane,Potentials, Resting,Potentials, Transmembrane,Resting Membrane Potentials,Resting Potential,Transmembrane Potential,Transmembrane Potential Differences
D009046	Motor Neurons	Neurons which activate MUSCLE CELLS.	Neurons, Motor,Alpha Motorneurons,Motoneurons,Motor Neurons, Alpha,Neurons, Alpha Motor,Alpha Motor Neuron,Alpha Motor Neurons,Alpha Motorneuron,Motoneuron,Motor Neuron,Motor Neuron, Alpha,Motorneuron, Alpha,Motorneurons, Alpha,Neuron, Alpha Motor,Neuron, Motor
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
D012012	Red Nucleus	A pinkish-yellow portion of the midbrain situated in the rostral mesencephalic tegmentum. It receives a large projection from the contralateral half of the CEREBELLUM via the superior cerebellar peduncle and a projection from the ipsilateral MOTOR CORTEX.	Nucleus Ruber,Nucleus, Red
D012154	Reticular Formation	A region extending from the PONS & MEDULLA OBLONGATA through the MESENCEPHALON, characterized by a diversity of neurons of various sizes and shapes, arranged in different aggregations and enmeshed in a complicated fiber network.	Formation, Reticular,Formations, Reticular,Reticular Formations
D001931	Brain Mapping	Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.	Brain Electrical Activity Mapping,Functional Cerebral Localization,Topographic Brain Mapping,Brain Mapping, Topographic,Functional Cerebral Localizations,Mapping, Brain,Mapping, Topographic Brain
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
D003689	Vestibular Nucleus, Lateral	Vestibular nucleus lying immediately superior to the inferior vestibular nucleus and composed of large multipolar nerve cells. Its upper end becomes continuous with the superior vestibular nucleus.	Deiter Nucleus,Lateral Vestibular Nucleus,Deiter's Nucleus,Nucleus Vestibularis Lateralis,Nucleus Vestibularis Magnocellularis,Nucleus of Deiters,Deiters Nucleus,Nucleus Vestibularis Laterali,Nucleus Vestibularis Magnocellulari,Nucleus, Deiter,Nucleus, Deiter's,Nucleus, Lateral Vestibular,Vestibularis Laterali, Nucleus,Vestibularis Lateralis, Nucleus,Vestibularis Magnocellulari, Nucleus,Vestibularis Magnocellularis, Nucleus
D005116	Extrapyramidal Tracts	Uncrossed tracts of motor nerves from the brain to the anterior horns of the spinal cord, involved in reflexes, locomotion, complex movements, and postural control.	Extrapyramidal Tract,Tract, Extrapyramidal
D005552	Forelimb	A front limb of a quadruped. (The Random House College Dictionary, 1980)	Forelimbs