This research explores how ultrasound, a common medical imaging tool, can be used to look at the ligaments that support the base of the thumb. These ligaments are important because they help the thumb stay stable during everyday tasks like opening jars, writing, or buttoning clothes. When these ligaments become weak or damaged, it can cause pain and lead to joint problems like arthritis. Right now, it's not easy for doctors to check the condition of these ligaments without advanced scans or surgery. By using ultrasound, which is safe and non-invasive, we hope to find a quicker and easier way to examine ligament health.