Which term describes the degree of motion a patient can attain on their own?

The term that describes the degree of motion a patient can attain on their own is known as Active Range of Motion (ROM). This refers to the movement achieved by a patient without any assistance, showcasing the muscular strength and control they possess over a joint or series of joints. Active ROM is an important measure in clinical biomechanics as it provides insight into the function of the patient's muscles, tendons, and neuromuscular control.

In contrast, Passive Range of Motion refers to the degree of motion achievable when an external force (such as a therapist) moves the joint without any effort from the patient. While Passive ROM can be useful for assessing flexibility and potential joint restrictions, it does not reflect the patient's own capabilities. Accessory Joint Motion pertains to the subtle movements between joint surfaces, significant in understanding joint mechanics but not directly related to the patient's voluntary motion. Paraphysiological Space is a term used to describe the area of movement slightly beyond the anatomical limits of the joint, which again does not relate to the active movement that a patient can perform independently. Thus, Active ROM is the correct term, focusing on the patient's self-directed movements.