How is the Orion Spur often described in relation to the major arms?

Answer

A local bridge or offshoot

The Orion Spur is often described as a minor feature, essentially a local bridge or offshoot situated between the major Perseus Arm and the Sagittarius Arm.

How is the Orion Spur often described in relation to the major arms?
galaxyastronomysolar systemMilky WaySagittarius Arm