Brain Function and Marijuana: Are there Changes after Abstinence of Consumption? Preliminary Results.

Background: The legalization of cannabis use and false claims about the plant Cannabis sativa to be considered a pharmaceutical product have been found to increase consumption, lower risk perception, and lead to more health problems, without reducing criminal activity. Brain function, typically assessed by neuropsychological tests, shows abnormalities with acute marijuana use, but inconsistent results have been published after abstinence, with a maximum follow-up of 28 days. Our previous research, using neuropsychological tests and brain perfusion single photon emission computed tomography (neuroSPECT), demonstrated consistent abnormalities in brain function among schoolchildren who consume marijuana compared to their non-consuming peers.

Differences in the variability of cerebral proton magnetic resonance spectroscopy (1H-MRS) measurements within three HIV-infected cohorts.

Introduction: Cerebral functional impairment remains prevalent in effectively treated HIV-infected subjects. As the results of formal cognitive testing are highly variable, surrogate markers to accurately measure cerebral function parameters are needed. Such markers include measurement of cerebral metabolite ratios (CMR) using proton magnetic resonance spectroscopy (1H-MRS).

An interval kicking progression for return to soccer following lower extremity injury.

Background And Purpose: The majority of all soccer injuries affect the lower extremities. Regardless of whether the injured limb is an athlete's preferred kicking or stance leg, a lower extremity injury may affect their ability to impact the ball. Sport-specific biomechanical progressions to augment loading and gradually reintroduce a player to the demands of sport have been developed for upper extremity sports such as baseball, softball, tennis, and golf.

A novel agent (Endozoicomonas elysicola) responsible for epitheliocystis in cobia Rachycentrum canadum larvae.

Aquaculture of cobia has gained popularity in the last decade, and this species is now farmed in several countries in Latin America and Asia. Despite recent improvement in production techniques that allowed the expansion of the industry, little is known about the diseases that affect cobia during the larviculture stage. In this article we investigated the cause of mass mortalities occurring 13-20 d post-hatching in 3 cycles of cobia larviculture.

Effect of white cell counts on the presence of human herpes simplex virus type-1 in saliva of pediatric oncology patients.

Objective: The objective of this study was to assess if there is increased herpes simplex virus type 1 (HSV-1) salivary shedding in oncology pediatric patients with severe cytopenia (SC).

Study Design: HSV-1 was detected by real time PCR in saliva samples from oncology pediatric patients (n = 30) during SC and relative cytopenia (RC), and from healthy children (n = 27).

Results: The frequency of HSV-1 positive saliva samples was higher in patients with SC as compared to controls (P < .

Oral manifestations of aplastic anemia in children.

Background: Few studies concerning oral manifestations of aplastic anemia (AA) in children have been reported. The purpose of the authors' study was to describe oral lesions in children with AA.

Methods: The authors conducted a retrospective review using medical records of children diagnosed with AA who were treated at the Pediatric Service of the Regional Hospital of Concepción, Chile, between March 1996 and May 2001.

Oral ulcers in children under chemotherapy: clinical characteristics and their relation with Herpes Simplex Virus type 1 and Candida albicans.

Objective: The objective of this study was to determine the clinical characteristics of oral ulcers in pediatric oncology patients undergoing chemotherapy and their relation with the presence of Herpes Simplex Virus (HSV) type 1 and Candida albicans.

Study Design: The sample consisted of 20 ulcerative lesions from 15 children treated with chemotherapy in the Pediatric Service of the Regional Hospital of Concepción, Chile. Two calibrated clinicians performed clinical diagnosis of the ulcers and registered general data from the patients (age, general diagnosis, absolute neutrophil count, and number of days after chemotherapy) and clinical characteristic of the ulcers: number, size, location, presence or absence of pain and inflammatory halo, edge characteristics, and exudate type.