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Chemical synapses are specialised junctions through which cells of the nervous system signal to one another and to non-neuronal cells such as muscles or glands. A chemical synapse between a motor neuron and a muscle cell is called a neuromuscular junction. Chemical synapses allow the neurons of the central nervous system to form interconnected neural circuits. They are thus crucial to the biological computations that underlie perception and thought. They also provide the means through which the nervous system connects to and controls the other systems of the body. The human brain contains a huge number of chemical synapses, with young children having about 1016 synapses (10,000 trillion[1].). This number declines with age, stabilising by adulthood. Estimates for an adult vary from 1015 to 5 × 1015 synapses (1,000 to 5,000 trillion).
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Бессонница, панические атаки, лишний вес, заболевания на нервной почве, интимные проблемы – в обиходе эти явления принято называть психосоматическими. С этими вопросами мы приходим к психологу, психотерапевту, психоаналитику, иногда к психиатру – лишь бы была заветная приставка «психо». И ждём ответов. А вместо ответов – сплошные сюрпризы, потому что «психо» вам в этих вопросах ...
It goes almost without saying that there has been a marked increase in the incidence of sexually transmitted diseases throughout the world in the past two to three decades. Indeed, despite the progress that has been made in methods of diagnosis and treatment, the sexually transmitted diseases as a whole are the most common communicable diseases and as such constitute an important health problem. The increase in incidence may be accounted for by changes in sexual behaviour, the introduction of contraceptives and the increasing mobility of the population. In addition, during the same time period, the number of infectious agents recognized as being sexually transmitted has increased considerabl...
Bone Marrow transplantation or Hematopoietic stem cell transplantation is a life saving procedure in a number of diseases,hematological and non hematological, which fail alternative medical management or have no other treatment options. It has transformed the lives of thousands of patients and their families around the world battling with fatal or debilitating diseases.There are many unique aspects of bone marrow transplantation which makes it very different from solid organ transplants. There is an enormous amount of research going on in this field both at clinical and basic science levels.With the rapidly changing world and field of transplantation, there is a need for an authoritative and...