👉 In medicine, a parencephalon is a type of brain tissue that develops from the outer layer of the brain called the diencephalon. This tissue forms in the lateral aspect of the brain, and it is responsible for various functions such as vision, hearing, speech processing, and movement control. The term "parencephalon" refers to the entire structure of the brain, which includes the diencephalon, cerebellum, and other structures that are not directly involved with brain function
