Which condition can primarily result from poor posture affecting TMJ?

The condition that can primarily result from poor posture affecting the TMJ is headaches. Poor posture, particularly in the neck and shoulders, can lead to an imbalance in the positioning of the head, which may affect how the jaw functions. When the jaw is misaligned due to improper posture, it can cause strain and stress in the muscles around the TMJ. This strain can result in tension headaches or migraines as the muscles contract and become fatigued from the dysfunctional movement and stress over time.

In contrast, the other options indicate positive outcomes or processes that would not commonly result from poor posture. Increased lubrication of the joint and improved jaw alignment would typically be associated with proper posture and jaw function, rather than its disruption. Reduced muscle tension would similarly not be a common result of poor posture, as misalignment tends to increase muscle tension instead.