(n.) The tip, top, point, or angular summit of anything; as, the apex of a mountain, spire, or cone; the apex, or tip, of a leaf.
(n.) The end or edge of a vein nearest the surface.
Example Sentences:
(1) After 1 year, anesthesia was induced with chloralose and an electrode catheter placed at the right ventricular apex.
(2) Following injections of HRP into the apex of the heart, the sinoatrial (SA) nodal region and the ventral wall of the right ventricle, we observed that HRP-labeled sympathetic neurons were localized predominantly in the right stellate ganglia, and to a lesser extent, in the right superior and middle cervical ganglia, and left stellate ganglia.
(3) It is therefore suggested that salt water adaptation triggers a cellular reorganization of the epithelium in such a way that leaky junctions (a low resistance pathway) appear at the apex of the chloride cells.
(4) When HRP was injected in the left ventricular wall or the apex, few labeled neurons were identified in the DMN.
(5) The length of the diaphragmatic wall of the heart in both the right and left ventricle was equal to the sum of the length of the inflow tract and the thickness of the ventricular wall at the apex.
(6) However, the external muscle fibers of the ventricles ran clockwise from base to apex toward the center of the vortex, which had a striking resemblance to the normal rather than the mirror image pattern.
(7) In the RAO view with the collimator flat against the chest there was better resolution of the cardiac apex.
(8) Their proliferating regions are located in the apex tip, where the various cells originate.
(9) In these tissues, the viral DNA replicated at the site of inoculation and was transported first to the roots, then to the shoot apex and to the neighboring leaves and the flowers.
(10) The vertical distances were compared with measurements taken from periapical radiographs between the apex of each mesial root and the superior border of the mandibular canal prior to sectioning.
(11) Three of six patients in whom treatment failed had disease at the vaginal apex.
(12) We recommend this skin incision for young patients with pneumothorax if the chest CT scan confirms that the bullae or blebs are localized to the apex of superior segment of the lower lobe.
(13) MRI only offered advantages over CT in lesions of the orbital apex, the upper part of the orbit, and in the diagnosis of inflammatory processes.
(14) In the accelerated protocol, one, two, and then three extrastimuli were introduced at each of three basic drive train cycle lengths (350, 400, and 600 msec) at the right ventricular apex; the procedure was repeated at a second right ventricular site.
(15) Magnetic resonance imaging of the chest in patients with lung cancer is being investigated, but current studies comparing it with CT demonstrate no definite advantage at this time, with the possible exception of the lung apex in which T1 weighted thin-section coronal views are useful.
(16) The apex to base lung distribution of 99Tcm-C and 81Krm appeared to be similar.
(17) If a web has a low apex angle and the skin is elastic, the length-width ratio may be as great as 1.5:1.
(18) Double product increase was inferior to that recorded before atenolol administration; the difference became significant after 2 months and reached its apex after 6 months of treatment.
(19) HRCT scans at the apex of the thorax in all nine patients scanned at this level showed that extrapleural fat with interspersed vessels accounted for most of the plain radiographic opacity.
(20) To determine if anodal excitation during bipolar stimulation facilitates the initiation of sustained monomorphic ventricular tachycardia, nonsustained polymorphic ventricular tachycardia, or repetitive ventricular responses, both bipolar and cathodal unipolar programmed ventricular stimulation with one to three extrastimuli delivered during ventricular pacing at two rates from the right ventricular apex were performed in 28 patients evaluated for spontaneous sustained ventricular tachycardia or ventricular fibrillation (11 patients), nonsustained tachycardia (eight patients), or syncope (nine patients).
Cuneate
Definition:
(a.) Alt. of Cuneated
Example Sentences:
(1) While the heaviest anterogradely labeled ascending projections were observed to the contralateral ventral posterolateral nucleus of the thalamus, pars oralis (VPLo), efferent projections were also observed to the contralateral ventrolateral thalamic nucleus (VLc) and central lateral (CL) nucleus of the thalamic intralaminar complex, magnocellular (and to a lesser extent parvicellular) red nucleus, nucleus of Darkschewitsch, zona incerta, nucleus of the posterior commissure, lateral intermediate layer and deep layer of the superior colliculus, dorsolateral periaqueductal gray, contralateral nucleus reticularis tegmenti pontis and basilar pontine nuclei (especially dorsal and peduncular), and dorsal (DAO) and medial (MAO) accessory olivary nuclei, ipsilateral lateral (external) cuneate nucleus (LCN) and lateral reticular nucleus (LRN), and to a lesser extent the caudal medial vestibular nucleus (MVN) and caudal nucleus prepositus hypoglossi (NPH), and dorsal medullary raphe.
(2) The data reported here, in combination with the published literature, suggest that the collaterals of roughly 300 G hair fibers overlap at any given point at middle levels of the cuneate nucleus.
(3) It is therefore unlikely to account for the adaptation time course either in cuneate neurons or at a subjective level.
(4) the solitary complex and the superficial rostral cuneate fascicle, were found to contain neuronal perikarya displaying a normally weak staining which was markedly enhanced after monoaminoxidase (MAO) inhibition.
(5) The practical implications of the results are 3-fold: firstly, they suggest that the 'P13' and P14 should both be intracranially generated, at a pre- and postsynaptic level with respect to the cuneate nucleus, respectively; secondly, they show that some discrepancies between previous papers dealing with SEPs and hypothermia can be explained by differences in the choice of the reference; thirdly, they bring some suggestions on a better use of SEPs to monitor patients undergoing aortic arch surgery.
(6) After applying horseradish peroxidase to the central cut end of the pharyngo-esophageal branch of the glossopharyngeal nerve in the cat, axon terminals labeled transganglionically with the enzyme were found ipsilaterally in the dorsomedial tip regions and ventromedial border regions of the dorsal division of the principal sensory trigeminal nucleus (dorsal Vp), as well as in the solitary, spinal trigeminal and medial cuneate nuclei.
(7) Replacement of extracellular chloride with isethionate or methylsulphate causes an increased efflux of 1-[14C]-GABA from the in vivo superfused rat cuneate nucleus.
(8) Multiple-unit responses to the acoustic CS+ were significantly enhanced in the auditory cortex, cochlear nucleus, and somatic cortex, but not in the cuneate nucleus.
(9) Other precerebellar nuclei which send their cerebellipetal axons to the inferior cerebellar peduncle, such as the external cuneate nucleus, the lateral reticular nucleus and the arcuate nucleus, were normally preserved.
(10) This dual organization of efferent connectivity is similar to that of the cuneate n.20, and is consistent with many of the differences in cytoarchitecture, afferent connectivity and response properties of cells within different portions of the dorsal column nuclei.
(11) Minor projections reach the rostral part of the medial and lateral cuneate nuclei, the reticular nucleus, the n. centralis dorsalis and the periependymal gray.
(12) Individual cuneate touch, touch-hair and proprioceptive neurones often display periodic components in their steady-state resting or evoked discharges.
(13) Terminations in the rostro-medial part of the dorsal accessory olive arise from the contralateral internal cuneate nucleus and from the opposite intermediate grey at C.1.
(14) We studied the ultrastructure and the synaptic arrangement of glutamate-immunoreactive terminals in rats, in the superficial laminae of the spinal cord, the brainstem cuneate nucleus, and the thalamic ventroposterolateral nucleus, where a role for glutamate as neurotransmitter has been suggested by biochemical, physiological and pharmacological approaches.
(15) In the external cuneate nucleus, the distributions of afferents from individual muscles constitute integral parts of a segmental representation.
(16) The present results provide a comprehensive description of the somatotopic patterns of termination of afferents from the skin of the hand and forearm in the spinal cord and cuneate nucleus of macaque monkeys.
(17) The cerebellar projection of the external cuneate nucleus and the adjoining rostral part of the internal cuneate nucleus were investigated by means of anterograde transport of tritiated leucine.
(18) As in cats, about one third of the neurons in the cuneate n. are GAD-positive; these have mostly small perikarya and they are present throughout the nucleus.
(19) These experiments show that calcitonin gene-related peptide-positive fibers in the cuneate nucleus originate mostly from C3-C6 medium sized dorsal root ganglia neurons but also from some small and large neurons.
(20) A good correspondence was found between the inhibition and the depolarization of group I afferent terminals in the cuneate nucleus.5.