Final answer:
The reticulospinal tract originates in the brainstem reticular formation and is a motor tract involved in posture and locomotion.
Step-by-step explanation:
The reticulospinal tract originates from the reticular formation within the brainstem and is classified as an extrapyramidal motor tract. This tract is responsible for modulating motor control, particularly influencing trunk and proximal limb muscles tied to posture and locomotion. Additionally, it plays a role in regulating muscle tone and autonomic functions within the body. Therefore, the correct answer to where the reticulospinal tract originates and what type of tract it is would be Originates in the brainstem reticular formation; motor tract.