Environmental causes of central nervous system maldevelopment.

نویسنده

Patricia M Rodier

چکیده

The central nervous system is the most vulnerable of all body systems to developmental injury. This review focuses on developmental processes by which the nervous system is formed and how those processes are known or suspected to be injured by toxic agents. The processes discussed are establishment of neuron numbers; migration of neurons; establishment of connections, neurotransmitter activity, and receptor numbers; deposition of myelin; and 2 processes that are prominent in postnatal development, trimming back of connections and postnatal neurogenesis. Our knowledge of the risks of exposure to environmental hazards in childhood and adolescence is minimal. Most of our information concerns the effects of neurotoxicants in prenatal and early postnatal life. More worrisome than our lack of data regarding later stages of development is the minimal effort that we have mounted to protect the public from known neurotoxic agents and that regulations for testing new drugs and chemicals still do not require any assessment of neuroteratologic effects.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The Role of Central Nervous System and Hypothalamic-Pituitary-Gonadal (HPG) Axis Changes in the Occurrence of Polycystic Ovary Syndrome: A Narrative Review Article

Background and Objectives: Polycystic ovary syndrome (PCOS) is a common reproductive endocrine disorder, affecting at least 10% of women in reproductive age. It is associated with hyperandrogenism, obesity, menstrual iregularity and infertility. There are several hypotheses regarding the metabolic, genetic, epigenetic, and environmental causes of the disease. Although the main cause of the dise...

متن کامل

P176: Neurological Diseases: Causes, Symptoms and Treatments

The nervous system is an extremely complex communication system that can send and receive large amounts of information simultaneously. The nervous system has two distinct parts: the central nervous system (the brain and the spinal cord) and the peripheral nervous system (the nerves located outside the brain and spinal cord). The main unit of the nervous system is neural cells (neurons). The rou...

متن کامل

P 64: Micro-Rna Disorder and Multiple Sclerosis

Noncoding ribonucleic acids micro-RNA is involved in the regulation of gene expression have major roles in the post-transcriptional level. A micro-RNA alone several causes down regulation of mRNA transcript of the target. Thus, small changes in the expression of a micro RNA may lead to significant changes in gene expression are different. Micro- RNA as key regulators of immune cell lineage diff...

متن کامل

P 137: Central Nervous System Involvement in Systemic Lupus Erythematosus

Systemic Lupus Erythematosus (SLE) is a complex clinical syndrome which its components are less clearly recognized and includes heterogeneous demonstrations engaging both central and peripheral nervous system along with disabling effects. This disease is called "thousand faces" due to these heterogeneous demonstrations. This gap exists while 75% of adults and children with SLE may dea...

متن کامل