(n.) The brain and spinal cord; the cerebro-spinal axis; myelencephalon.
Example Sentences:
(1) Therefore, these findings may extend the use of platelets as neuronal models.
(2) Although solely nociresponsive neurons are clearly likely to fill a role in the processing and signalling of pain in the conscious central nervous system, the way in which such useful specificity could be conveyed by multireceptive neurons is difficult to appreciate.
(3) On the other hand, after exposure to BrdUrd, neuron specific enolase decreased in NB-1 and SK-N-DZ and increased in GOTO.
(4) The present findings indicate that the deafferented [or isolated] hypothalamus remains neuronally isolated from the environment if the operation is carried out later than the end of the first week of life.
(5) This modulation results from repetitive, alternating bursts of excitatory and inhibitory postsynaptic potentials, which are caused at least in part by synaptic feedback to the command neurons from identified classes of neurons in the feeding network.
(6) However, the firing of 5-HT neurons appears to relate to the state of vigilance of the animal.
(7) As prolongation of the action potential by TEA facilitates preferentially the hormone release evoked by low (ineffective) frequencies, it is suggested that a frequency-dependent broadening of action potentials which reportedly occurs on neurosecretory neurones may play an important role in the frequency-dependent facilitation of hormone release from the rat neurohypophysis.
(8) Two small populations of GLY + neurons were observed outside of the named nuclei of the SOC; one was located dorsal to the LSO, near its dorsal hilus, and the other was identified near the medial pole of the LSO.
(9) Based on our results, we propose the following hypotheses for the neurochemical mechanisms of motion sickness: (1) the histaminergic neuron system is involved in the signs and symptoms of motion sickness, including vomiting; (2) the acetylcholinergic neuron system is involved in the processes of habituation to motion sickness, including neural store mechanisms; and (3) the catecholaminergic neuron system in the brain stem is not related to the development of motion sickness.
(10) Thus, it appears that neuronal loss may account for up to roughly half of the striatal D2 receptor loss during aging.
(11) This report is an overview of the data and has incorporated some additional findings of the influence of the ACTH4-9 analog, Org2766, on neuronal excitation, especially in the hippocampus.
(12) The results are consistent with our previous suggestion that lethality for virulent SFV infection results from a lethal threshold of damage to neurons in the CNS and that attenuating mutations may reduce neuronal damage below this threshold level.
(13) We conclude that the rat somatosympathetic reflex consists of an early excitatory component due to the early activation of RVL-spinal sympathoexcitatory neurons with rapidly conducting axons and a later peak that may arise from the late activation of these same neurons as well as the early activation of RVL vasomotor neurons with more slowly conducting spinal axons.
(14) We conclude that neuronal activities in the region of the retrofacial nucleus are important both in the integration of stimuli from the central chemoreceptors and in defining the discharge patterns of respiratory neurons.
(15) In electrophysiological studies with neurons of Lymnaea stagnalis, THA inhibited the slow outward K+ current and consequently increased the duration of the action potentials.
(16) In the ultrastructural analysis, GABA-like immunoreactivity (GABA-LI) was detected in neuronal perikarya, dendrites, axons, and axon terminals.
(17) Two weeks later, the IL-3-treated animals showed significant numbers of acetylcholinesterase-positive neurons remaining in the septal region.
(18) The data indicate that adult neurons with an intrinsic ability to regenerate axons can respond to substances with neurotrophic or neurite-promoting activities in tissue cultures.
(19) The axons of A5, RPoOl and RaD neurons exhibit no lateral predominance in their spinal projections.
(20) Intramembrane particles (IMP) were quantitatively assessed in the perikaryal plasma membranes of infundibular neurons.
Soma
Definition:
(n.) The whole axial portion of an animal, including the head, neck, trunk, and tail.
Example Sentences:
(1) An initial complex-soma inflection was observed on the rising phase of the action potential of some cells.
(2) Axons emerge from proximal dendrites within 50 microns of the soma, and more rarely from the soma, in a tapering initial segment, commonly interrupted by one or two large swellings.
(3) In cat, DARPP-32-immunoreactive cell bodies identified as Müller cells were demonstrated in the inner nuclear layer (INL) with processes closely surrounding the cell soma of photoreceptors in the outer nuclear layer.
(4) Today the physician who treats women with emotional problems during menopause cannot function solely as a psychotherapist; he must deal with both their soma and psyche.
(5) For those synapses that were close to the soma the time constant for decay for the non-NMDA component, which was voltage insensitive, ranged from 4-8 ms. 7.
(6) We find that the labelled cell has a myelinated axon, but that the axon loses its myelin within 50 microns of the soma and has not yet been traced further.
(7) The soma of the injured neutron has a dense perinuclear ring of RNA.
(8) The effective electrical geometry under the conditions of control and 0.5 mM PNB sufficient to completely abolish the postsynaptic potential were determined from analyses of the membrane charging curves assuming the lumped-soma-short-cable model.
(9) Sequential recordings of spike amplitudes from the axon hillock, soma, and lateral dendrite suggest that the generator of the axotomy-induced component is localized to the normally passive soma and proximal dendrite.
(10) In order to determine whether there is a relationship between soma diameter and oxidative enzyme activity of alpha-motoneurons, we investigated the alpha-motoneurons innervating the different portions within a rat gluteus medius muscle.
(11) In oestrogen-treated preparations, tuberoinfundibular arcuate neurons responsive and unresponsive to accessory bulb stimulation could be distinguished by the frequency of successful antidromic propagation into the soma.
(12) These cells were also NSE positive and were characterized by the presence of soma action potentials.
(13) It is concluded that barium ions have at least 2 points of attack in the ganglion: 1, on the soma membrane of the neurones, and 2, on the presynaptic terminals controlling them.
(14) By the end of this period the neuronal soma and the proximal dendrites appeared mature in terms of both morphology and synaptic input.
(15) Although the globular bushy cell axons were not completely filled from the soma of origin to terminal fields in the contralateral brainstem, a number of consistent anatomical features were distinguished in the population.
(16) Approximately 85% of Na channels in the soma are essentially indistinguishable from those in the giant axon with regard to gating properties and sensitivity to tetrodotoxin or saxitoxin.
(17) In slices cut parallel to the pyramidal neurons (perpendicular to the brain surface) one can study chemosensitivity of the various parts of the dendritic tree and the soma.
(18) It has not been possible to connect the efferent somas with the fibers.
(19) Interestingly, the M-cell soma which stains positive for AChE was ChAT negative.
(20) However, the distribution of the enzymes is indirectly correlated as high levels of particulate cyclic AMP-dependent protein kinase are present in the soma of neurons with high concentrations of adenylate cyclase in their terminals.