The Aortic Annulus is the ring-like structure at the base of the aortic valve. It forms the transition between the left ventricle and the aorta. Clinicians use it as a key reference point when evaluating aortic valve disease. It is also used to size and plan valve procedures, including surgical and catheter-based options.
Extension is a movement that increases the angle between two body parts. In the spine, Extension usually means bending backward, such as arching the low back or looking up with the neck. It is commonly used in physical exams, rehabilitation, imaging tests, and surgical planning. Clinicians often discuss Extension together with flexion (bending forward) to describe how the spine moves and where symptoms change.
The Tricuspid Annulus is the ring-like attachment point where the tricuspid valve leaflets meet the heart muscle. It sits between the right atrium (upper right chamber) and right ventricle (lower right chamber). Clinicians refer to it often on echocardiography reports and during valve repair planning. It is also a key target and reference point for some surgical and catheter-based tricuspid procedures.
Flexion is a bending movement that decreases the angle between two body parts. In the spine, Flexion means bending forward, like bringing your chin toward your chest or rounding your low back. It is used in everyday movement, exercise, physical exams, and medical imaging. Clinicians also use Flexion concepts to describe posture, joint motion, and how symptoms change with movement.
The Mitral Annulus is a ring-like structure at the base of the mitral valve in the left side of the heart. It provides the attachment point for the mitral valve leaflets and helps the valve open and close properly. Clinicians commonly reference it in echocardiography reports and in planning mitral valve repair or replacement. It is also a key landmark in some catheter-based heart valve procedures.
Range of motion describes how far a joint or region of the body can move. It is commonly measured during musculoskeletal and neurologic examinations. Spine clinicians use it to understand mobility, pain behavior, and function. Rehabilitation teams use it to track progress over time.
The Pulmonary Valve is one of the heart’s four valves. It sits between the right ventricle and the pulmonary artery. It opens to let blood flow to the lungs and closes to prevent backward flow. Clinicians commonly assess it during heart exams and cardiac imaging.
Spinal biomechanics is the study of how the spine moves and how it bears load. It explains how bones, discs, joints, ligaments, and muscles work together to create stability and motion. Spinal biomechanics is commonly used in spine care, rehabilitation, injury analysis, and surgical planning. It is also used in research and medical device design to understand forces on the neck, mid-back, and low back.
The Pulmonic Valve is one of the four valves of the heart. It sits between the right ventricle and the pulmonary artery. Its job is to keep blood moving forward from the heart to the lungs. In clinical care, it is commonly discussed during echocardiograms and congenital heart disease follow-up.
Suboccipital muscles are a small group of deep muscles at the base of the skull, just above the top of the neck. They connect the skull to the first two cervical vertebrae and help control fine head movements and head posture. In spine and headache care, they are commonly discussed when evaluating upper neck pain, cervicogenic headache, and occipital-area symptoms.