Radiation therapy for feline cutaneous squamous cell carcinoma using a hypofractionated protocol.

The objective of this paper was to evaluate the efficacy of a hypofractionated radiation protocol for feline facial squamous cell carcinoma (SCC). Twenty-five histologically confirmed SCCs in 15 cats were treated with four fractions of 7.6-10Gy each, with 1 week intervals.

[A neurocomputational model for the thalamocortical loop: towards a better understanding of attention deficit hyperactivity disorder].

Background: Inattention symptoms observed in patients with attention deficit hyperactivity disorder (ADHD) are mostly related to a hypoactivity in the mesocortical dopaminergic pathway. However, mesothalamic dopaminergic variations also affect the attentional control, and possibly lead to attention alterations in ADHD.

Purpose: Elaborating a neurocomputational model from biochemical knowledge of mesocortical and mesothalamic dopamine systems, to investigate how different levels of mesothalamic dopamine influence the thalamocortical loop, leading to some attention deficits observed in ADHD.

A graph model for the evolution of specificity in humoral immunity.

The immune system protects the body against health-threatening entities, known as antigens, through very complex interactions involving the antigens and the system's own entities. One remarkable feature resulting from such interactions is the immune system's ability to improve its capability to fight antigens commonly found in the individual's environment. This adaptation process is called the evolution of specificity.

The UFRJ-UERJ group: interdisciplinary virtual reality experiments in neuropsychiatry.

This paper describes the research lines of an interdisciplinary group composed by two government universities in Rio de Janeiro. The first research line, a Virtual Environment for testing the acceptance of Virtual Reality equipment by schizophrenia patients, has stimulated a growing interest in this area in the country and abroad. The second research line, in progress now, develops a virtual environment to improve the learning abilities of children with Attention-Deficit and Hyperactivity Disorder (ADHD).