DESCENDING MOTOR PATHWAYS. Sherrington called the motor neuron the final common pathway. All the subtle signals converging from several descending tracts as well as afferent input from the periphery are somehow integrated on the motor neuron, which subsequently conducts the appropriate signal out to the muscle.
An actor (often actress for females; see terminology) is a person who portrays a character in a performance. Simplistically speaking, the person denominated actor or actress is someone beautiful who plays important characters and lives off their physical beauty. The actor performs in the flesh in the traditional medium of the theatre, or in modern mediums such as film, radio, and television.
A threat actor, also called a malicious actor, is an entity that is partially or wholly responsible for an incident that impacts â or has the potential to impact -- an organization's security. In threat intelligence, actors are generally categorized as external, internal or partner. With external threat actors, no trust or privilege previously exists, while with internal or partner actors, some level of trust or privilege has previously existed.