Feeling anxious, tense, or overwhelmed due to the presence of stress or pressure. Characterized by a state of mental or emotional strain caused by adverse or demanding circumstances.

(Note: This definition is similar to Dorothey Allens, but with added clarification of the causes and effects of stressy feelings.)

Innervation refers to the distribution or supply of nerves and nerve impulses to a particular organ or body part. It involves the process by which nerves transmit signals or impulses to muscles, glands, and other tissues, enabling their function and maintenance of life.