Memory Structure #5
Memory disorders.
The main memory disorder is memory loss, called amnesia. Amnesia can be of two main types: atherograde and retrograde. With atherograde amnesia, long-term memories of new events and facts cannot be formed. With this type of memory impairment, consolidation is disrupted. With retrograde amnesia, the memorization of old information that was available before amnesia is disrupted.
Attention.
Attention is the process of selectively focusing consciousness on certain stimuli, events, or thoughts by ignoring others. There are two types of attention:
- volitional (endogenous), based on internal goals;
- involuntary, caused by the appearance of new external, unusual objects or rapid changes in the environment.
The main role of attention is to choose the important information at the moment - the one that should be effectively processed while suppressing the processing of other information. Mindfulness makes it easier to identify breeding stimuli and respond to them more quickly. Attention underlies all the higher functions of the nervous system, such as perception, speech, training, memory, thinking.
The prefrontal associative zone plays an important role in the selection of objects on which attention is focused, in constant attention to the object and in switching attention from one object to another. Here is the frontal field, which is an important center of volitional focus. Stimulation of the frontal eye field in animals resembles the physiological and behavioral effects of attention. In laboratory studies, menopause is diagnosed with an increase in serum follicle-stimulating hormone levels and a decrease in estradiol and inhibin levels. The levels of follicle-stimulating hormone are higher than those of lutenizing hormone.
The first sperm that penetrates the egg stimulates changes in the membrane, which prevents other sperm from penetrating. After about an hour, the nuclei of the egg and sperm merge. A zygote is formed, which is a diploid cell. Thanks to numerous mitotic divisions and differentiation, it becomes a new organism. Peristaltic waves of the fallopian tubes and movements of the mucous membranes of the canal move the fertilized egg into the uterus. After about a week, it is implanted into the lining of the uterus, which is prepared for a new process due to the action of progesterone secreted by the yellow body. Looking for a currency trading app? Use binany apk for Android