Objective Analysis of skull thickness at the area of halo pin in

Objective. Analysis of skull thickness at the area of halo pin insertion site.

Summary of Background Data. Halo orthosis is a device used for providing stable fixation

of instability of cervical spine injury. Although this device can be applied quickly and safely, complications do occur. While clinical experiences have informed us that cranial bone thickness varies with age.

Methods. Coronal computerized tomography scans of 415 heads of patients who had no head injury, skull fracture, or craniofacial abnormalities were reviewed. All scans were performed with a Philips CX/Q. The patients’ ages were between 15 days and 89 years. Measurements were taken directly from the computer console, using the measure mode function. These measurements were obtained in millimeters at the locations where halo pins would normally be placed. Statistical analyses within and between selleck compound all age groups were performed using analysis of variance tests.

Results. The skull thickness increased with age at all sites measured. The average thickness of skull at the anterior midline varied from 5.62 mm (0-9 years) to 7.42 mm (80-89 years). The average thickness of the anterolateral

was from 5.52 to 8.54 mm, and the average thickness of the posterolateral was from 5.59 to 8.86 mm.

Conclusion. The thickness of skull at the halo pin insertion site gradually increases with age. Our study reveals that the thickness of skull reaches a steady peak in third to sixth decades. The thickness of skull at the anterior midline can be predicted by a simple linear regression equation: A = 7.302 + 0.014*age.”
“Chemical modification of LDL is a PCI-34051 nmr key event in atherogenesis. Modified LDL particles have the ability to act in all selleck kinase inhibitor stages of atherosclerosis. LDL modified by different mechanisms shares an increase of the negative charge of the particle. A subfraction of LDL with an increased electronegative charge – named electronegative LDL (LDL(-)) – has been reported in blood and can be considered as a pool of modified LDL particles in circulation. LDL(-) displays inflammatory and apoptotic properties,

is poorly recognized by LDL receptors and binds with high affinity to arterial proteoglycans. The proportion of LDL(-) in the blood is higher in patients who have a greater cardiovascular risk and active atherosclerosis. The heterogeneous origin of LDL(-) raises the possibility that its quantification could reflect the overall modification of LDL. Future studies conducted in large groups of patients are necessary to determine whether LDL(-) could be a useful biomarker to monitor the development of atherosclerosis.”
“This is the first report that presents renal transplantation after bilateral nephrectomy as the final treatment for severe renovascular hypertension due to fibromuscular dysplasia (FMD). We describe the history of a 1-year-old girl who suffered from renovascular hypertension due to FMD.

Article history: Received 24 July 2012, Accepted 7 November 2012,

Article history: Received 24 July 2012, Accepted 7 November 2012, Available online 29 December 2012″
“Atrial fibrillation (AF) is self-perpetuating, via mechanisms of acute electrical remodelling and ‘second factors’ acting over a longer time course. Renin-angiotensin system (RAS) blockade may inhibit AF self-perpetuation. We evaluated the effects of RAS blockade with candesartan in a burst-paced goat model of lone AF in which both mechanisms are known to operate. Bioactivity of oral candesartan was demonstrated in 10 goats by inhibition of the pressor effect NVP-LBH589 of angiotensin II. The effects of candesartan on electrical remodelling were assessed in 12 placebo and 12 candesartan-treated

goats in a 28-day burst pacing protocol. To assess the effects of candesartan on second factors Fludarabine mw (structural remodelling), 16 goats underwent further 28-day periods of burst pacing (two periods in 16 goats, three periods in eight goats) each separated by periods of sinus rhythm sufficient for electrical remodelling to reverse. There was a progressive rise in angiotensin levels in both groups. Candesartan (0.5 mg/kg/day) achieved a 76% blunting of the pressor effect of angiotensin II and had no effect on electrical remodelling; the half time for fall of atrial effective refractory period (AERP) was 22.3 +/- 4.9 h (placebo) and 22.0 +/- 3.2 h (candesartan) (p = ns). Candesartan had no effect on AF stability, which progressively

increased over successive 28-day periods (ANOVA p < 0.05). Candesartan had no effect on atrial electrical remodelling or the operation of ‘second factors’ in a goat model of lone AF. These findings suggest that any benefits of RAS blockade in patients with AF are unlikely to be due to direct effects on atrial remodelling.”
“Objectives: To investigate population trends in thoracic aortic disease (dissections YH25448 order and aneurysms) in England and Wales, with focus on the impact of thoracic endovascular aortic repair on procedure numbers and age at repair.

Materials and methods: Routine hospital

statistics of England and Wales provided admission, procedure and mortality data from 1999 to 2010. All data were age-standardised, reported per 100,000 population, by age bands (>50 years or 50-74 years versus 75+ years) and gender. Only patients 50+ years were included, to focus on degenerative disease.

Results: Between 1999 and 2010 hospital admissions for total (ascending and descending) have risen steadily for thoracic aortic dissection (TAD) from 7.2 to 8.8 and thoracic aortic aneurysm (TAA) from 4.4 to 9.0, principally attributable to increased admissions in those 75+ years. Total mortality declined steadily over the same period, for TAD from 4.4 to 3.2 and for TAA from 10.4 to 7.5. Procedure rates have risen sharply, driven by the implementation of TEVAR from 2006, for type B dissection from 0.06 to 0.53 and for descending TAA from 0.76 to 1.89.

The forbidden frequency gaps have not been found in photonic crys

The forbidden frequency gaps have not been found in photonic crystals because they are not caused

by the Bragg multiple-reflections to create conventional photonic band gaps. The position of the forbidden frequency gap depends on the ratio of the period of the plasmonic crystal and the air-gap size. The steep edges of the frequency gaps could be useful in sensing a chemical or a bio-chemical reaction in a terahertz Crenolanib in vivo wave range. (C) 2011 American Institute of Physics. [doi:10.1063/1.3610515]“
“Aims: To assess the feasibility of a standardized multidisciplinary protocol for the management of locally advanced breast cancer (LABC). We also evaluated the accuracy of magnetic resonance imaging (MRI) and positron emission tomography (PET) in predicting the extent of residual disease.

Methods: Patients with LABC were offered

preoperative chemotherapy of docetaxel 75 mg/m(2), doxorubicin 50 mg/m(2), cyclophosphamide 500 mg/m(2) (TAC), every 21 days for six cycles, until progression or intolerable toxicity. MRI and PET were performed at baseline and six cycles. Patients underwent a mastectomy or complete local excision, followed by radiotherapy. Trastuzumab and endocrine treatment were recommended where appropriate.

Results: Between April 2005 and October 2006, 51 patients were included from three institutions, and 50 received TAC (90% commenced within 35 YH25448 chemical structure days of diagnosis), with 44 patients completing six cycles 3-deazaneplanocin A clinical trial (88%). Pathological complete response was seen in 10 patients (19.6%); all had invasive ductal carcinoma. No patient with invasive lobular carcinoma achieved pathological complete response. MRI was the most accurate method of assessing the extent of residual cancer. In total, 45 (88%) patients underwent

surgery within the protocol-specified time and 12 (23%) patients had breast conservation surgery. At a median follow-up of 41.3 months, there were three local recurrences. Ten patients (19.6%) developed distant metastases, resulting in an 80% actuarial disease-free survival.

Conclusion: This regimen of TAC is effective and well-tolerated and is likely to result in improved outcomes since patients can receive optimal multimodality treatments.”
“Two experiments were conducted to evaluate the effects of slow-release urea (SRU) versus feed-grade urea on portal- drained visceral (PDV) nutrient flux, nutrient digestibility, and total N balance in beef steers. Multi-catheterized steers were used to determine effects of intraruminal dosing (Exp. 1; n = 4; 319 +/- 5 kg of BW) or feeding (Exp. 2; n = 10; 4 Holstein steers 236 +/- 43 kg of BW and 6 Angus steers 367 +/- 46 kg of BW) SRU or urea on PDV nutrient flux and blood variables for 10 h after dosing. Intraruminal dosing of SRU (Exp.

The mean number of preantral follicles in the ovaries of Bos indi

The mean number of preantral follicles in the ovaries of Bos indicus-taurus cows with high AFC (116226 +/- 83156 follicles) was greater (p<0.05) than that of Bos indicus cows (63032 +/- 58705 follicles) with high AFC. However, there was no significant correlation between numbers of antral and preantral follicles.”
“BACKGROUND: This study investigated the synthesis

of magadiite from a natural diatomite material. The influence of key reaction parameters, including reaction time, temperature and AZD2014 mw molar ratios of Na(2)O/SiO(2) and H(2)O/Na(2)O, on the formation of magadiite were investigated. The as-synthesized magadiite was characterized by X-ray powder diffraction, scanning electron microscopy, infrared spectroscopy, thermogravimetry and differential thermal analysis.

RESULTS: The well crystallized magadiite with a rosette like morphology was prepared from a dispersion with the molar ratio H(2)O/Na(2)O = 28.15 and Na(2)O/SiO(2) = 0.15 by heating at 160 degrees C for 42 h. The basal space of the synthesized magadiite is 15.5 angstrom and the stretching and bending frequencies of the SiO(4) units making up the magadiite layer were recorded. The layered structure was

destroyed when the temperature rose above 250 degrees C, and combining the results of thermogravimetry and differential Captisol supplier thermal analysis suggested the structural alteration may be due to the condensation of silanol groups.

CONCLUSION: Diatomite has been used to synthesize magadiite with a high purity and well crystallized. The cost of synthesis has been reduced allowing its use in conventional industrial applications, thus expanding the commercial utilization of diatomite. (C) 2009 Society of Chemical Industry”
“Familial hypercholesterolemia (FH) affects on average 1 in 500 individuals in European countries, and it is estimated that FH in

Poland may affect more than 80,000 people. However, in Poland, only about 20% of the population is estimated to have been diagnosed with FH, of which only a small number receive adequate treatment. FH results in more rapid development of atherosclerosis and is associated with a high risk of cardiovascular PF2341066 events. Atherosclerosis develops beginning in childhood in patients with FH and reaches advanced stages before clinical manifestations develop. Inadequate diagnostics and treatment of FH in Polish children suggests a need for raising the level of awareness and understanding of the condition in both society and among health professionals. These recommendations present the current epidemiological status, guidelines for diagnosing FH in Polish children and adolescents, and effective treatment options. (C) 2014 National Lipid Association. All rights reserved.”
“Anterior cervical decompression and fusion (ACDF) procedures are successful in treating multilevel cervical radiculopathy and cervical myelopathy.

The magnets, in the form of cylinders, were observed to decrepita

The magnets, in the form of cylinders, were observed to decrepitate exclusively from the ends. High-resolution electron microscopy was QNZ nmr able to identify the presence of crack formation within the Nd(2)Fe(14)B grains, with the cracks running parallel to the c axis of these grains. Based on the concentration profile for hydrogen in a rare-earth transition-metal material, it is clear that the presence of hydrogen-induced cracks running perpendicular to the ends of the magnet provides

for a much more rapidly progressing hydrogen front in this direction than from the sides of the magnet. This results in the magnet exhibiting a macroscopic tendency to decrepitate from the poles of the magnet toward the center. This combination of microstructural modification via particle alignment as part of

the sintering process and direct observation via high-resolution electron microscopy has led to a satisfying explanation for the anisotropic hydrogen-decrepitation effect. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3348632]“
“DNA-based methods have emerged as an additional tool for Brucella infection-confirmation at a herd level. However, their JNK-IN-8 chemical structure implementation may require the use of specialized equipment. In this context the recently developed loop-mediated isothermal amplification (LAMP) technique may constitute an additional and cost-effective tool for rapid and specific DNA detection, especially in low income areas. In the present study the usefulness of a newly developed LAMP assay aiming at the multicopy-IS711 sequence was assessed on a variety of clinical samples (n = 81 from abortions and ewes; cattle, n = 3; swine, n = 4) that were analyzed in parallel using real-time PCR and bacteriology. Although check details overall sensitivities obtained with the three

methods were comparable (p > 0.05), our results highlighted the complementarity between bacteriology and molecular-based methods for increased sensitivity. Significant differences (p < 0.05) were observed with all techniques depending on the nature of the sample. Our results demonstrate the potential of the IS711-LAMP technique for direct Brucella detection. (c) 2013 Elsevier Ltd. All rights reserved.”
“BACKGROUND: Nebulized amphotericin B deoxycholate (n-ABD) is used to prevent Aspergillus infection in lung transplantation. Nebulized liposomal amphotericin B (n-LAB) is another option; however, no clinical data are available on the results of n-LAB for this purpose.

METHODS: In an observational study performed in 2 centers to assess the feasibility, tolerability, and outcomes of n-LAB prophylaxis, 104 consecutive patients undergoing prophylaxis with n-LAB were compared with 49 historical controls who received n-ABD. Patient follow-up lasted 12 months. The n-LAB prophylaxis regimen was 25 mg thrice weekly starting on the first post-operative day and continuing to 60 days, 25 mg once weekly from 60 to 180 days, and the same dose once every 2 weeks thereafter.

Definitions to standardize diagnoses among SOT recipients are nee

Definitions to standardize diagnoses among SOT recipients are needed.”
“Objective. Botulinum toxin A (BoNT-A) injections into the prostate have been reported to be effective and durable in the treatment of small benign prostatic hyperplasia (BPH). This study evaluated the effectiveness

of BoNT-A in patients with large BPH with an unsatisfactory response to combined -blocker and 5–reductase inhibitor therapy. Material and methods. Sixty patients with BPH and total prostate volume (TPV) of 60 ml with unsatisfactory response to combination medical therapy were randomly assigned to receive add-on intraprostatic BoNT-A injection (n=30) or continued medical therapy (control group). Patients in the treatment group received 200-600 U of Botox injected into the prostate. Stem Cell Compound Library datasheet Outcome parameters including International Prostate Symptom Score (IPSS), quality of life index (QoL-I), TPV, maximum flow rate (Q max) and postvoid residual (PVR) were compared

between treatment and control groups at baseline, 6 months and 12 months. Results. Significant decreases in IPSS, QoL-I and TPV, and increase in Q max were observed at 6 months Selleckchem HSP990 and remained stable at 12 months in the treatment group. Improvements in IPSS and QoL-I were also observed at 6 months and a decrease in TPV at 12 months was noted in the control group. However, no significant changes in any parameters except for QoL-I at 6 and 12 months were noted between the treatment and control groups. Acute urinary retention developed in three

patients receiving BoNT-A treatment. Three BoNT-A and two medical treatment patients converted to transurethral surgery at the end of study. Conclusions. This study shows that add-on prostatic BoNT-A medical treatment can reduce prostate volume and improve lower urinary tract symptom score and QoL-I within 6 months in the treatment of large BPH. However, the therapeutic effect at 12 months was similar to combination medical treatment.”
“The methanolic and aqueous extracts of whole plant of Ceratophyllum demersum were AZD4547 order evaluated for antidiarrhoeal and wound healing potentials using experimental models in rats. Acute oral toxicity studies were performed according to the OECD 423 guidelines. Antidiarrhoeal activity at a dose of 250 and 500 mg/kg was evaluated in castor oil and magnesium sulphate induced diarrhoea in rats and the parameters studied were: total no. of faeces, no. of wet faeces, percentage inhibition of defecation and diarrhoeic drops. Wound healing activity of the both the extracts (5 % w/w ointment in simple ointment base) was evaluated in excision wound model and the parameters taken into account were percentage of wound closure and epithelialization time. Both the extracts at a dose of 500 mg/kg showed significant antidiarrhoeal and also showed significant wound healing activities (5 % w/w).

4 +/- A 6 3 and 80 3 +/- A 7 2, respectively) were

signif

4 +/- A 6.3 and 80.3 +/- A 7.2, respectively) were

significantly improved after treatment (P = 0.032 and P = 0.002, respectively). And the ORR between the two groups were significantly different (P = 0.001).

Percutaneous vertebroplasty is a minimally invasive surgery for MM-associated pathologic fracture. PVP had the characteristics of minimal trauma, easy operation and less complication. PVP can achieve long-term analgesic effect, and enhance the spinal stability.”
“Objectives: The aim of this study is to compare the analgesic and anti-inflammatory effects of the local postoperative administration of a single 12-mg dose of betamethasone after the surgical removal of impacted lower third molars. Study design: A split-mouth, triple-blind, randomized, check details placebo-controlled Epigenetics inhibitor clinical trial of 25 patients requiring the surgical removal of symmetrical lower third molars was performed. In the experimental side, a 12-mg dose of betamethasone was administered submucosally after the surgical procedure, while in the control side a placebo (sterile saline solution) was injected in the same area. To assess postoperative pain, visual analogue scales

and the consumption of rescue analgesic were used. The facial swelling and trismus were evaluated by measuring facial reference distances and maximum mouth opening.

Results: There were no significant differences between the two study groups regarding postoperative pain, facial swelling and trismus.

Conclusions: The injection of a single dose of betamethasone does not seem to reduce pain, facial swelling and trismus after impacted lower third molar removal when compared to placebo.”
“The

electroencephalography source estimation problem consists of inferring cortical activation from measurements of electrical potential this website taken on the scalp surface. This inverse problem is intrinsically ill-posed. In particular the dimensionality of cortical sources greatly exceeds the number of electrode measurements, and source estimation requires regularization to obtain a unique solution. In this work, we introduce a novel regularization function called cortical graph smoothing, which exploits knowledge of anatomical connectivity available from diffusion-weighted imaging. Given a weighted graph description of the anatomical connectivity of the brain, cortical graph smoothing penalizes the weighted sum of squares of differences of cortical activity across the graph edges, thus encouraging solutions with consistent activation across anatomically connected regions. We explore the performance of the cortical graph smoothing source estimates for analysis of the event related potential for simple motor tasks, and compare against the commonly used minimum norm, weighted minimum norm, LORETA and sLORETA source estimation methods.

Furthermore, the patients showed an increased stability index, su

Furthermore, the patients showed an increased stability index, suggesting that they need to maintain a “”safety margin”"

between the XCoM and CoP during the gait termination. Patients develop a series of compensatory strategies in order HDAC inhibitors cancer to preserve balance during planned gait termination, e.g. increasing their step width and number of steps. Ataxic patients need to maintain a safety margin in order to avoid instability when stopping. Given the potential risk of falls when stopping, walking ataxic patients may benefit from a rehabilitation treatment focused on preserving and improving their ability to terminate gait safely.”
“Adolescence is a transitional life phase that is associated with heightened risk for two major health conditions – obesity and mental health problems. Given the established comorbidity of obesity and depression, one avenue that warrants further exploration is the association between obesogenic this website risk and obesity in the expression and maintenance of depressive symptoms. The aim of the current systematic review was to identify and evaluate the empirical literature reporting the relationships between obesogenic risk factors (physical

activity, sedentary behaviour, diet and weight status) and depression in adolescents. A search of five databases for studies published over the last decade found 24 studies eligible for review. Relationships were found between lack of physical exercise, heightened sedentary behaviour, poor diet quality, obese or overweight and depression in adolescence. However, the finding that obesogenic risk factors are associated

with poor adolescent eFT-508 molecular weight mental health should be interpreted with caution as data typically come from non-representative samples with less than optimal study design and methodology.”
“Objective: To examine the methods used to calculate the reported medication initiation rates in secondary fracture prevention programs.

Study Design and Setting: A systematic review was conducted on postfracture interventions that aimed to improve osteoporosis management in an orthopedic environment. Two authors independently reviewed eligible articles to determine the numerator and denominator used to calculate the rates of antiresorptive medication initiation based on author reports. In interventions with numerator and denominator combinations that appeared to be comparable, we examined the inclusion and exclusion criteria to confirm comparability.

Results: Fifty-seven articles reporting on 64 interventions were eligible for the review. A total of 28 different combinations of numerators and denominators to calculate rates were reported for medication initiation across 49 of the 64 interventions. After examining the inclusion and exclusion criteria for rates that appeared to be comparable, the highest number of interventions with a comparable rate was 3.

Gregg C Fonarow, MD, is a consultant for Novartis and Pfizer W

Gregg C. Fonarow, MD, is a consultant for Novartis and Pfizer. W. Frank Peacock, MD, has received research grants (>$10000) from Abbott, Alere, Brahms, Corthera, EKR, Nanosphere, and The Medicines Company; is a consultant (<$10000) for Abbott, Alere, Beckman Coulter, Electrocore, and The

Medicines Company; participates in the speakers’ bureau (<$10000) with Abbott and Alere; and has an ownership interest (<$10000) in Comprehensive Research Associates LLC, Vital Sensors, and Emergencies in Medicine LLC. Lee H. Schwamm, MD, is a consultant for Stroke Systems and Medtronic. Deepak L.

Bhatt, buy Navitoclax MD, MPH, discloses the following relationships – Advisory Board: Medscape Cardiology; Board of Directors: Boston VA Research Institute, Society of Chest Pain Centers; Chair: American Heart Association Get With The Guidelines Science Subcommittee; Honoraria: American College of Cardiology (Editor, Clinical Trials, Cardiosource), Duke Clinical Research Institute (clinical trial steering committees), Slack Publications (Chief Medical Editor, Cardiology Today Intervention), WebMD (CME steering committees); Research

CH5183284 Grants: Amarin, AstraZeneca, Bristol-Myers Squibb, Eisai, Ethicon, Medtronic, Sanofi Aventis, The Medicines Company; Unfunded Research: FlowCo, PLx Pharma, Takeda. Sylvia E. Rosas has received a research grant from Abbott Laboratories and honorarium from Genzyme. The Get With The Guidelines-Coronary Artery Disease (GWTG-CAD) program was provided by the American Heart Association. selleck compound The GWTG-CAD program was supported in part through the American Heart Association Pharmaceutical Roundtable and an unrestricted educational grant from Merck. The authors have no other

funding, financial relationships, or conflicts of interest to disclose. Additional Supporting Information may be found in the online version of this article.”
“The purpose of this study was to investigate the developmental tendency of velopharyngeal structures in different-age patients with cleft palate (CP) to provide reference for selecting surgery in clinic. The investigators implemented a retrospective study, and 66 patients were selected, including 38 boys and 28 girls (average age, 15 years 5 months +/- 7 years). These patients were divided into 3 groups (G1, G2, and G3) according to their ages and were taken lateral pre-operative cephalograms at rest and during phonation of /i/. Twelve lengths and 3 ratios variables were defined in this study. All these measurements were analyzed by analysis of variance and post hoc test, whereas P value was set at 0.05. There were significant differences of velar thickness and height, vertical velar length, pharyngeal height and depth, uvular pharyngeal depth, and hard palate length and height.

This finding is more robust for males than for females

This finding is more robust for males than for females SU5402 in vitro between the ages of 40 and 90 years.”
“Hypothesis

Evaluate,

based on morphologic and histologic parameters, the atraumaticity of 2 electrode arrays implanted in 10 human temporal bones.

Background

Atraumatic surgery and electrode arrays are current topics in otologic surgery. The preservation of cochlear anatomy and its functions is a priority and morphologic evaluation of the surgical trauma is essential to continue improving in this field.

Methods

Ten preserved human temporal bones (TB) without anatomic alterations were used in this study. They were divided into 2 groups of 5, and atraumatic surgery was performed to insert HiFocus 1J (group A) and HiFocus Helix (group B) electrode arrays. Anatomic comparisons were performed using computed tomography and histologic analysis.

Results

Group A: the mean length 4SC-202 supplier for the cochlear longitudinal axis was 10.30 mm, and the cochlear transversal axis was 7.2 mm. Scala tympani insertion was achieved in 4/5 TB studied, with a mean depth and angle of insertion

of 19.2 mm and 325.5 degrees, respectively. Lateral location of the electrode array was achieved in all specimens. No significant correlation was observed between these dimensions and depth of insertion. Group B: the mean length for the cochlear longitudinal axis was 9.52 mm, and cochlear transversal axis was 6.38 mm. Scala tympani AZD2014 supplier insertion was achieved in 4/5 TB studied, with a mean depth and angle of insertion of 17.5 mm and 352 degrees, respectively. Modiolar location of the electrode array was achieved in all specimens. A positive correlation was established between the linear and angular insertion depths (p = 0.044).

Conclusion

In summary,

it is safe to state that neither electrode array shows significant insertion trauma.”
“Pediatric aggression is common in human societies, mainly presenting as impulsive aggression or predatory aggression. Numerous psychiatric disorders can contain aggression as a symptom, leading to difficulties in diagnosis and treatment. This review focuses on the biological systems that affect pediatric aggression. We review the hypothalamic-pituitary-adrenal (HPA) axis, the hypothalamic-pituitary-gonadal (HPG) axis, and the mechanisms by which these axes influence the body and mind of aggressive children and adolescents. Although this review focuses on the HPA and HPG axes, it is important to note that other biological systems have relationships with these two axes. Based on the results of the studies reviewed, elevated cortisol concentrations were associated with impulsive aggression, whereas, low levels of cortisol were associated with callous-unemotional traits similar to predatory aggression. Higher levels of dehydroepiandrosterone were correlated with higher levels of aggression as were higher levels of testosterone.