Leptotene Stage

The leptotene stage is one of the stages of development of the human embryo. It occurs after the zygote and precedes blastulation.

The leptotene stage occurs 4-5 days after fertilization. At this stage, the embryo consists of two cells called blastomeres. They begin to divide and form into more complex structures.

During the leptotene stage, the formation of germ layers - ectoderm, mesoderm and endoderm - occurs. These sheets will be used to form various organs and systems of the body.

In addition, at the leptotene stage, the formation of the nervous system begins. Nerve cells begin to form at this stage, and they will continue to grow and develop until birth.

It is important to note that the leptotene stage is a very important stage in the development of the embryo, since it is at this stage that the main structures and systems of the body are formed. If any mistake occurs at this stage, it can lead to serious consequences for the health of the unborn child. Therefore, it is necessary to monitor the development of the embryo throughout pregnancy and, if necessary, take measures for its normal development.

Leptotene stages of consciousness development

The discovery of conditioned reactions of the brain determines the way of development of human consciousness as a system. Conditioned reactions are always changes in the brain. Thanks to these changes, the functioning of the nervous system changes, the excitability of both individual neurons and nerve centers that create dominant foci increases. The development of consciousness is a product of the transition of excitation from one focus of the dominant to others. The movement of excitation from one point to another is formalized as a transition through several stages. A common feature of all these stages is both an increase in the response of the central nervous system to signals from the external world, and the emergence of conscious sensitivity, in contrast to