EPRs were recorded in a group of 18 medicine-free

EPRs were recorded in a group of 18 medicine-free SRT1720 concentration OCD patients and 18 normal controls using a modified Stroop paradigm in which the participants were asked to make a judgment of congruent or incongruent stimuli. The reaction time to color-word incongruent stimuli in the OCD group was significantly longer than the reaction time to congruent stimuli. In the OCD group, a significant negativity shift was discovered in P350 amplitude and N450 amplitude in response to incongruent stimuli, a shift not present in the control group. The amplitude of difference waveform was significantly higher for OCD than for control subjects. The findings probably revealed an inhibitory deficit in

patients with OCD when performing semantic conflict tasks. The results suggest that this type of inhibitory deficit may be the cause of increased Stroop effects in patients with OCD, and one of contributors to the pathophysiology of OCD. (C) 2013 Elsevier Ireland Ltd. All rights reserved.”
“The Foretinib crystal structure of Phenylalanyl-tRNA synthetase from E. coli (EcPheRS), a class II aminoacyl-tRNA synthetase, complexed with phenylalanine and AMP was determined at 3.05 angstrom resolution. EcPheRS is a (alpha beta)(2) heterotetramer: the alpha beta heterodimer of EcPheRS consists of 11 structural domains. Three of them: the N-terminus, A1 and A2 belong to the alpha-subunit and B1-B8 domains to the beta subunit. The structure of EcPheRS revealed that

architecture of four helix-bundle interface, characteristic of class IIc heterotetrameric aaRSs, is changed: each of the two long helices belonging to CLM transformed into the coil-short helix structural fragments. The N-terminal domain of the alpha-subunit in EcPheRS forms compact triple helix domain. This observation is contradictory to the structure of the apo form of TtPheRS, where N-terminal domain was not detected in the electron density map. Comparison of EcPheRS structure with TtPheRS has uncovered significant rearrangements of the structural domains involved in tRNA(Phe) binding/translocation.

As it follows from modeling experiments, to achieve a tighter fit with anticodon loop of tRNA, a shift of similar to 5 angstrom is required for C-terminal domain B8, and of similar to 6 to 7 angstrom for the whole N terminus. EcPheRSs have emerged as an important target for the incorporation INCB018424 of novel amino acids into genetic code. Further progress in design of novel compounds is anticipated based on the structural data of EcPheRS.”
“Human cytomegalovirus (HCMV) is the leading viral cause of birth defects and life-threatening lung-associated diseases in premature infants and immunocompromised children. Although the fetal lung is a major target organ of the virus, HCMV lung pathogenesis has remained unexplored, possibly as a result of extreme host range restriction. To overcome this hurdle, we generated a SCID-hu lung mouse model that closely recapitulates the discrete stages of human lung development in utero.

Conclusion We demonstrated that fMRI can detect a dermatome-depen

Conclusion We demonstrated that fMRI can detect a dermatome-dependent pattern of spinal cord activity during vibratory stimulation and can be used as a passive stimulus for the noninvasive assessment of the functional integrity of the human spinal cord. Demonstration of cross-sectional selectivity of the activation awaits further methodological and experimental refinements.”
“Purpose:

Prostate cancer has a unique set of problems associated with its early detection and diagnosis that might be aided by the addition of molecular markers, such as DNA hypermethylation. DNA methylation is an important epigenetic mechanism of gene regulation that has a critical role in normal developmental processes. Aberrant DNA methylation is a hallmark of carcinogenesis and GSTP1 hypermethylation is the most common molecular alteration in human prostate cancer. To our knowledge AZD3965 chemical structure the clinical usefulness of the detection of gene methylation is yet to be established.

Materials

and Methods: We evaluated GSTP1 hypermethylation in urine collected after prostatic massage and in core needle biopsies from 100 men referred for diagnostic biopsy.

Results: Methylation of GSTP1 in urine specimens had 75% sensitivity and 98% specificity for prostate cancer. GSTP1 methylation in the biopsy had 88% specificity and 91% sensitivity. Interestingly we observed a higher frequency of GSTP1 methylation in the urine of men with stage III vs II disease (100% vs 20%, p = 0.05).

Conclusions: This study suggests that the detection of GSTP1 methylation in prediagnostic urine may improve the AZD1480 supplier specificity of PSA and help distinguish men with prostate cancer from those with benign prostatic LY3023414 clinical trial hyperplasia. This finding should be further explored in a larger, prospective screening trial.”
“Hyperglycemia is a well-known factor in reducing nocturnal pineal melatonin production. However, the mechanism underlying diabetes-induced insufficiency of pineal

melatonin has remained uncertain. This study was undertaken to examine the structure, innervation and functional activity of the pineal gland in streptozotocin (STZ)-induced diabetes in rats by immunohistochemistry, Western blotting and image analysis. The number of the pinealocytes and the volume of pineal were also estimated using stereologic quantification including the optical fractionator and Cavalieri’s method. It has also shown a progressive reduction of the total area of the pineal gland and the nuclear size of pinealocytes beginning at 4 weeks of induced diabetes. Surprisingly, the immunoreactive intensities and protein amounts of serotonin (5-HT) and protein gene product (PGP) 9.5 in the pineal gland were progressively increased from 4 weeks of diabetes. Meanwhile, nerve fibers immunoreactive for PGP 9.5 had disappeared.

Constitutive alterations of cytoskeletal proteins may play a role

Constitutive alterations of cytoskeletal proteins may play a role in the development of DN. We investigated the expression of these proteins in cultured skin fibroblasts, obtained from long-term TlDM patients with and without DN but comparable metabolic control, and from matched healthy subjects, by means of 2-DE electrophoresis and MS-MALDI analyses. In T1DM with DN, compared to the other

two groups, quantitative analyses revealed an altered expression of 17 spots (p < 0.05-p < 0.01), corresponding to 12 unique proteins. In T1DM with DN, beta-actin and three isoforms of tubulin beta-2 chain, tropomodulin-3, and LASP-1 were decreased, whereas selleck two tubulin beta-4 chain isoforms, one alpha actinin4 isoform, membrane-organizing extension spike protein (MOESIN), FLJ00279 (corresponding to a fragment of myosin heavy chain, non-muscle type A), vinculin, a tropomyosin isoform, and the macrophage capping protein were increased. A shift in caldesmon isoforms was also detected. These

results demonstrate an association between DN and the constitutive expression of cytoskeleton proteins in cultured skin fibroblasts from TlDM with DN, which may retain pathophysiologycal implications.”
“Despite effective therapies for smoking cessation, most smokers find quitting difficult and most successful quitters relapse. Considerable evidence AG-120 price supports a genetic risk for nicotine dependence; however, less is known about the pharmacogenetics of smoking cessation. In the first pharmacogenetic investigation of the efficacy of varenicline and bupropion, we examined whether genes important in the pharmacodynamics and pharmacokinetics

of these drugs and nicotine predict medication efficacy and adverse events. Subjects participated in randomized, double-blind, placebo-controlled smoking cessation clinical trials, comparing varenicline, a nicotinic acetylcholine receptor (nAChR) partial agonist, with bupropion, a norepinephrine/dopamine reuptake inhibitor, and placebo. Primary analysis included 1175 smokers of European ancestry, and 785 single nucleotide polymorphisms from 24 genes, representing 254 linkage disequilibrium (LD) bins (genes included nAChR subunits, selleck chemicals additional varenicline-specific genes, and genes involved in nicotine or bupropion metabolism). For varenicline, continuous abstinence (weeks 9-12) was associated with multiple nAChR subunit genes (including CHRNB2, CHRNA5, and CHRNA4) (OR = 1.76; 95% CI: 1.23-2.52) (p<0.005); for bupropion, abstinence was associated with CYP2B6 (OR = 1.78; 95% CI: 1.27-2.50) (p<0.001). Incidence of nausea was associated with several nAChR subunit genes (OR = 0.50; 95% CI: 0.36-0.70) (p<0.0001) and time to relapse after quitting was associated with HTR3B (HR = 1.97; 95% CI: 1.45-2.68) (p<0.0001).

In this study, different

RNA-extraction procedures were c

In this study, different

RNA-extraction procedures were compared for two FMDV rRT-PCRs. The NucleoSpin columns available commercially combined high extraction efficiency with ease-of-automation. Furthermore, six different FMDV-negative matrices were spiked with a dilution series of FMDV SAT1 ZIM 25/89. Compared to cell-culture-spiked viral control samples, no matrix effect on the analytical sensitivity was found for blood or foot epithelium. Approximately I log(10) reduction in detection limit was noted for faecal and tongue epithelium samples, whereas a 3 log(10) decrease was observed for spleen samples. By testing the same dilution series in duplicate on 10 different occasions, an estimation of uncertainty of measurement and precision was obtained using blood as matrix. Both Z-IETD-FMK in vitro rRT-PCRs produced mTOR inhibitor highly precise results emphasising their potential to replace conventional virological methods. The uncertainty measurement, as described in this study, proved to be a useful tool to evaluate the probability of making a wrong decision. (C) 2009 Elsevier B.V. All rights

reserved.”
“Caenorhabditis elegans is a nematode that has been used as a valuable research tool in many facets of biological research. Researchers have used the many tools available to investigate this well-studied nematode, including a cell lineage map, sequenced genome, and complete wiring diagram of the nervous system, making in-depth investigation of ALOX15 the nervous system practical. These tools, along with other advantages, such as its small size, short life cycle, transparency, and ability to generate many progeny, have made C. elegans an attractive model for many studies, including those investigating toxicological paradigms and those using high throughput techniques. Researchers have investigated a number of endpoints, such as behavior and protein expression using a green fluorescent protein (GFP) marker following toxicant exposure and have explored the mechanisms of toxicity using techniques

such as microarray, RNA interference (RNAi), and mutagenesis. This review discusses the benefits of using C. elegans as a model system and gives examples of the uses of C. elegans in toxicological research. High throughput techniques are discussed highlighting the advantages of using an in vivo system that has many advantageous characteristics of an in vitro system while emphasizing endpoints relating to developmental and adult neurotoxicity. (C) 2008 Elsevier Inc. All rights reserved.”
“We designed a degenerate primer set that yielded full-length amplification of hemagglutinin (HA), neuraminidase (NA), matrix (M), and non-structural protein (NSP) genes of influenza A viruses in a single reaction mixture. These four genes were amplified from 15 HA (1-15) and 9 NA (1-9) subtypes of influenza A viruses of avian (n = 16) origin. In addition, 272 field isolates of avian origin were tested by this method.

At the beginning of each trial, we manipulated the expectations o

At the beginning of each trial, we manipulated the expectations of the subjects GSK126 nmr for an upcoming sculpture by presenting information about its authenticity (either “”genuine”" or “”fake”"),

although all images were actually taken from genuine artworks. The image of the sculpture was then presented, either in its original proportion or after being deformed by a photo-editing software. This 2 x 2 factorial design enabled us to identify whether each component of the EEG response was sensitive to contextual information (genuine or fake), visual information (original or deformed), or both. Results revealed that amplitudes of a positive EEG component emerging at 200-300 ms after the presentation of the artworks (mainly distributed over the parietal cortex) were significantly modulated by both visual and contextual factors, indicating a rapid integration of these two types of information in the brain. (C) 2013 Elsevier Ltd. All rights reserved.”
“To

define whether age modifies the prognosis of patients with chronic kidney disease (CKD) on nephrology care, we prospectively followed patients with CKD who have been receiving nephrology care in a clinic for 1 year or more. The incidence of end-stage renal disease (ESRD), defined by the occurrence of dialysis or transplant, or death without ESRD was estimated by a competing-risk approach, and interactions between age and risk factors tested in Cox models over a median follow-up period of 62.4 months. Of 1248 patients with stage III-V CKD, LCL161 supplier 481 were younger than 65, 410 were between 65 and 75, and 357 were over 75 years old. Within each age class, the mean estimated glomerular filtration rate (eGFR) was 31, 32, and 29 ml/min per 1.73m(2), respectively. There were 394 ESRD events and 353 deaths. The risk of ESRD was higher than the risk of death without ESRD for ages <60 years, and independent of eGFR. The ESRD risk diminished with aging but still prevailed for eGFRs of 25-35 in patients all between 65 and 75 years and

with an eGFR below 15 in those up to 85 years old. Proteinuria significantly increased the risk of ESRD with advancing age. Surprisingly, the unfavorable effects of cardiovascular disease on ESRD and of diabetes on survival significantly decreased with increasing age. Male gender, higher phosphate, lower body mass index, and hemoglobin were age-independent predictors for ESRD, while cardiovascular disease, lower hemoglobin, higher proteinuria and uric acid, and ESRD also predicted death. Thus, in older patients on nephrology care, the risk of ESRD prevailed over mortality even when eGFR was not severely impaired. Proteinuria increases ESRD risk, while the predictive role of other modifiable risk factors was unchanged compared with younger patients.

Kidney International (2012) 82, 482-488; doi:10.1038/ki.2012.

Collectively, these results suggest that the sound-evoked behavio

Collectively, these results suggest that the sound-evoked behavioral and neural hyperactivity induced by SS may arise from a SS-induced suppression of GABAergic inhibition in the AC. (C) 2011 IBRO. Published by Elsevier Ltd. All rights reserved.”
“Purpose: We characterized the biomacromolecular composition of phosphatic urinary stones using solid state nuclear magnetic resonance spectroscopy. We identified possible parallels between the

nature of the organic matrix-mineral interface in stones and that in other mineralized tissue using nuclear magnetic resonance BAY 11-7082 supplier spectroscopy rotational echo double resonance.

Materials and Methods: We analyzed 28 phosphatic (apatite and mixed apatite-struvite) surgically removed stones by nuclear magnetic resonance spectroscopy using (31)P, (13)C and a 9.4 Tesla magnetic field. Ten samples had sufficient signal from biomacromolecular organic material to characterize the mineral/organic interface by (13)C(31)P rotational echo double resonance.

Results: Biomacromolecular organic material was most abundant in phosphatic stones in which apatite predominated. Nuclear magnetic resonance spectroscopy detected variable proportions of protein, glycosaminoglycan, lipid and carbonate. Rotational echo double resonance revealed strong interaction between mineral and glycosaminoglycan molecules, and to a lesser extent protein molecules,

on the sub-nm length scale, implying that glycosaminoglycan and protein are composited https://www.selleckchem.com/products/4-hydroxytamoxifen-4-ht-afimoxifene.html into or onto the mineral lattice by strong physicochemical interactions. Carbonate ions substituted into apatite crystal lattices also showed the expected strong (13)C(31)P rotational echo double resonance effects. Conversely when present, lipid, calcium oxalate hydrates and uric acid showed no rotational echo double resonance effects, proving that they exist as deposits or crystals distinct from phosphatic mineral/biomacromolecular composites.

Conclusions:

The intimate coexistence of biomacromolecules, especially glycosaminoglycan, with apatite in phosphatic stones supports the notion that they may have a key role in stone pathogenesis. The underlying intermolecular relationships may reflect those governing the formation of Randall’s plaque in nascent stones.”
“Penile erection is essential for successful copulation check details in males. Dopaminergic projections from the paraventricular nucleus (PVN) to the ventral tegmental area (VTA) and from the VTA to the nucleus accumbens (NAc) are thought to exert a facilitatory effect on penile erection. Our previous study showed that treatment with an extract of Ginkgo biloba leaves (EGb 761) enhances noncontact erection (NCE) in male rats. However, the relationship between NCE and dopaminergic activity in the PVN, VTA, and NAc remains unknown. The present study examined the relationship between NCE and central dopaminergic activity following EGb 761 treatment.

We show that Twsg1 is expressed in the adult mouse brain in

We show that Twsg1 is expressed in the adult mouse brain in

the choroid plexus (CP), hippocampus, and other regions, with the strongest expression observed in CP. TWSG1 was also detected in a human fetal brain at mid-gestation, with highest levels in the epithelium of CP. Bmp1, Bmp2, Bmp4-Bmp7 as well as BmprIA and BmprII, but not BmprIB, were expressed in CP. BMP antagonists Chordin (Chrd) and Noggin were not detected in CP, however Chrd-like 1 and brain-specific Chrd-like (Brorin) were expressed. Electrophysiological study of synaptic BX-795 plasticity revealed normal paired-pulse facilitation and long-term potentiation in the CA1 region of hippocampus in Twsg1 mice. Among the homozygous mutants that survive beyond the first 2 weeks, the prevalence of hydrocephalus was 4.3%, compared to

1.5% in a wild type colony (P=0.0133) AZD5363 between 3 and 10 weeks of life. We detected a high level of BMP signaling in CP in wild type adult mice that was 17-fold higher than in the hippocampus (P=0.005). In contrast, transforming growth factor beta (TGF beta) signaling was predominant in the hippocampus. Both BMP signaling and the expression of BMP downstream targets Msx1 and Msx2 were reduced in CP in Twsg1(-/-) mice. In summary, we show that Twsg1 is expressed in the adult mouse and human fetal CP. We also show that BMP is a branch of TGF beta superfamily that is dominant in CP. This presents an interesting avenue for future research in light of the novel roles of CP in neural progenitor differentiation and neuronal repair, especially since TWSG1 appears to be the main regulator of BMP present in CP. (C) 2010 IBRO. Published by Elsevier Ltd. All rights reserved.”
“Introduction Unexplained differences between classes of antihypertensive drugs in their effectiveness in preventing stroke might be due to Class effects on intraindividual variability in blood pressure. We did a systematic review

to assess any such effects in randomised controlled trials.

Methods Baseline and follow-up data for mean (SD) of systolic blood pressure (SBP) were extracted from trial PD173074 research buy reports. Effect of treatment on interindividual variance (SD(2)) in blood pressure (a surrogate for within-individual variability), expressed as the ratio of the variances (VR), was related to effects on clinical outcomes. Pooled estimates were derived by use of random-effects meta-analysis.

Findings Mean (SD) SBP at follow-up was reported in 389 (28%) of 1372 eligible trials. There was substantial heterogeneity between trials in VR (p<1×10(-40)), 68% of which was attributable to allocated drug class. Compared with other drugs, interindividual variation in SBP was reduced by calcium-channel blockers (VR 0.81, 95% CI 0.76-0.86, p<0.0001) and non-loop diuretic drugs (0.87, 0.79-0.96, p=0.007), and increased by angiotensin-converting enzyme (ACE) inhibitors (1.08, 1.02-1.15, p=0.008), angiotensin-receptor blockers (1.16, 1.07-1.25, p=0.

As a result, we now have much deeper information about both the m

As a result, we now have much deeper information about both the membrane as well as the cytosolic proteins of erythrocytes. In this review, we have discussed

the role of red cell proteome on the two most well-studied hemoglobin disorders, sickle cell disease and thalassemia, emphasizing on the differential expression of the redox regulator proteins and chaperones, in particular. We have also touched upon the importance of the association of the varying levels of hemoglobin variants, particularly HbE on the clinical manifestation of composite diseases like HbE beta thalassemia.”
“Background. Neurocognitive dysfunction in schizophrenia (SZ), bipolar (BD) and related disorders represents a core feature of these illnesses, possibly a marker of underlying pathophysiology. Substantial overlap in domains of neuropsychological deficits has been reported among these disorders after illness onset. However, it is unclear SRT1720 in vivo whether deficits follow the same longitudinal pre- and post-morbid course across diagnoses. We examine evidence for neurocognitive dysfunction as a core feature of all idiopathic psychotic illnesses, and trace its evolution from pre- morbid and prodromal states through the emergence of overt psychosis and into chronic illness in patients with SZ, BD and related disorders.

Method. Articles reporting on neuropsychological DNA Damage inhibitor functioning in patients with SZ, BD and

related disorders before and after illness onset were reviewed. Given the vast literature on these topics and the present focus on cross-diagnostic comparisons,

selleck screening library priority was given to primary data papers that assessed cross-diagnostic samples and recent meta-analyses.

Results. Patients with SZ exhibit dysfunction preceding the onset of illness, which becomes more pronounced in the prodrome and early years following diagnosis, then settles into a stable pattern. Patients with BD generally exhibit typical cognitive development pre- morbidly, but demonstrate deficits by first episode that are amplified with worsening symptoms and exacerbations.

Conclusions. Neuropsychological deficits represent a core feature of SZ and BD; however, their onset and progression differ between diagnostic groups. A lifetime perspective on the evolution of neurocognitive deficits in SZ and BD reveals distinct patterns, and may provide a useful guide to the examination of the pathophysiological processes underpinning these functions across disorders.”
“Purpose: Physician knowledge of factors related to patient decisional regret following definitive management for localized prostate cancer is an important but under evaluated element in comprehensive patient counseling. Using validated instruments, we analyzed the relationships of pathological, perioperative and functional health related quality of life variables to treatment related regret following robot-assisted laparoscopic prostatectomy.

Results: Compared with the secundum atrial septal defect group (n

Results: Compared with the secundum atrial septal defect group (n = 90), the inferior sinus venosus defect group (n 45) had worse technical outcome scores (P = .02), a higher rate of reintervention (9% vs

1%, P = .04), longer median total cardiopulmonary bypass (48 vs 39 minutes, P<.001) and crossclamp (29 vs 20 minutes, P<.001) times, and were more likely to stay more than 1 day in the intensive care unit (20% vs 8%, P = .04) and more than 3 days in the hospital (29% vs 13%, P = .03). Only 16 (36%) of the patients with inferior sinus venosus defect had a correct diagnosis preoperatively. Patients with SRT2104 price an incorrect diagnosis had worse technical outcome scores than the secundum atrial septal defect group (P = .003), whereas those with a correct diagnosis had scores similar to those of the secundum atrial septal defect group (P = .55).

Conclusions: Compared with patients with secundum atrial septal defect, patients with inferior sinus venosus defect have more residual defects and longer durations of cardiopulmonary bypass and hospitalization. Rates of misdiagnosis of inferior sinus venosus defect are high and associated with worse technical outcome scores. Accurate preoperative diagnosis of this lesion may lead to improved outcomes. (J

Thorac Cardiovasc Surg 2011; 142: 517-22)”
“The cerebellum is important for motor coordination, as well as motor learning and memories. Learning is believed to occur in the cerebellar cortex, in the form of ZD1839 supplier synaptic plasticity. Central to motor learning theory are Purkinje cells (PCs), which are the sole output neurons Dipeptidase of the cerebellar cortex. Motor memories are postulated to be stored in the form of long-term depression (LTD) at parallel fiber synapses with PCs, once thought to be the only plastic synapse in the cerebellar cortex. However, in the past few decades many studies have demonstrated that several other synapses in the cerebellar cortex are indeed plastic, and that LTD or long-term potentiation at these various synapses could

affect the overall output signal of PCs from the cerebellar cortex. Almost all of these forms of synaptic plasticity are dependent on calcium to some extent. In the current review we discuss various types of synaptic plasticity in the cerebellar cortex and the role of calcium in these forms of plasticity. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.”
“This article provides a perspective on the current status of drug therapy for invasive fungal diseases, together with priorities for the future development of novel compounds. Key opportunities for new drugs include production of orally bioavailable agents for the treatment of invasive aspergillosis, invasive candidiasis, cryptococcal meningitis and mucosal and urinary Candida infections.

These observations are consistent with the argument that the rhes

These observations are consistent with the argument that the rhesus monkey DCN has

neuronal features similar to those of other nonprimate mammals. (C) 2008 IBRO. Published by Elsevier Ltd. All rights reserved.”
“Background Pain is costly Forskolin manufacturer and a major reason for seeking medical care. Our aim was to assess the proportion of people experiencing pain, and the severity of pain, at randomly selected times in a representative sample of individuals in the USA.

Methods A community-based telephone survey was designed that attempted to contact about 10 700 individuals by random-digit dialling. After collecting diary information for one 24-h period, ratings of pain on a 0-6 anchored scale for Selumetinib three randomly selected 15-min intervals of the day were obtained. Outcome measures were the proportion of intervals with non-zero pain, the proportion of intervals with pain above 3 (the scale midpoint), and the average

pain rating. Activities of those individuals who reported substantial pain were also examined. To make the results representative of the US population, sample data were adjusted with sample weights developed by the Gallup Organisation.

Findings 3982 individuals were interviewed (response rate 37%). After adjustment for weighting, 28.8% of men and 26.6% of women reported feeling some pain at sampled times. Those with lower income or less education spent a higher proportion of time in pain and reported higher average pain than did those with higher income or

more education. The average pain rating increased with age, although it reached a plateau between the ages of about 45 years and 75 years, with little difference between men and women. Mirabegron Satisfaction with life or health and the pain indicators tended to move in opposite directions.

Interpretation The diary-survey methods described here could be used to study pain at the population level, and will enable the combination of pain assessments with information about activities of daily living.

Funding US National Institute of Aging, Hewlett Foundation.”
“The marginal shell of the anteroventral cochlear nucleus houses small cells that are distinct from the overlying microneurons of the granule cell domain and the underlying projection neurons of the magnocellular core. This thin shell of small cells and associated neuropil receives auditory nerve input from only the low (<18 spikes/s) spontaneous rate (SR), high threshold auditory nerve fibers; high SR, low threshold fibers do not project there.