Alignment

Data Points:

• Anterior Coronal Deviation: The max angle the upper arm traveled anteriorly (forward) from the coronal plane throughout the entire movement
• Elbow Flexion: The max angle of the upper arm segment relative to the lower arm segment throughout the entire movement with 0 deg being a straight arm.
• Inferior Transverse Deviation: The max angle the upper arm traveled inferiorly (below) the transverse plane of the shoulder joint throughout the entire movement
• Superior Transverse Deviation: The max angle the upper arm traveled superiorly (above) the transverse plane of the shoulder joint throughout the entire movement
• Sagittal Plane Lateral Deviation: The max angle the upper arm traveled laterally (away) from the body's midline throughout the entire movement
• Total Thoracic Lateral Flexion: The total lateral flexion angle (in the coronal plane, to the side) of both the left and right side. Measured between the upper spine and lower spine throughout the entire movement
• Thoracic Flexion: The max flexion angle (in the sagittal plane, forward) between the upper spine and lower spine throughout the entire movement
• Lumbar Flexion: The max flexion angle (in the sagittal plane, forward) between the lower spine and pelvis throughout the entire movement
• Trunk Flexion: The trunk is defined as a line from the sacrum to base of the neck. Trunk flexion is determined by the max angle between trunk in the sagittal plane (forward) and vertical throughout the entire movement. Trunk flexion is positive.
• Max Weight Shift: Weight shifts are calculated using the ground reaction force (N) imposed by each leg. The max weight shift is determined by the percentage of mass on the right and left legs when the maximal difference in weight distribution occurs.
• Hip Adduction: Hip adduction is determined by the max adduction that occurs between the pelvis and the femur throughout the entire movement. Adduction is positive and abduction is negative.
• Femoral Rotation: After zeroing the amount of femoral rotation at the beginning of motion, femoral rotation is determined by the max transverse plane femoral motion during the recording. Internal rotation is positive and external rotation is negative.
• Dynamic Valgus: Dynamic valgus is defined as Θ. It is calculated in three steps: calculating the leg plane by taking the cross product of the hip-to- ankle vector and lower torso y-axis vector, calculating the distance from the knee to the leg plane, and then using the knee deviation, femoral length, and tibial length to calculate ɑ, β, and Θ. The dynamic valgus displayed is the max that the individual exhibits throughout the entire movement.

• Tibial Rotation: After zeroing the amount of tibial rotation at the beginning of motion, tibial rotation is determined by the max transverse plane tibial motion during the recording. Internal rotation is positive and external rotation is negative.
• Lateral Trunk Flexion: The trunk is defined as a line from the sacrum to base of the neck. Lateral Trunk flexion is determined by the max angle between trunk in the frontal plane and vertical during the recording. Trunk flexion towards the stance leg is positive.
• Pelvic Obliquity: Pelvic obliquity is determined by the max pelvic hike or drop during the recording. Positive indicates a hike while negative indicates a drop.
• Femoral Lateral Tilt: Femoral lateral tilt is the angle between the femur’s deviation in the frontal plane and vertical. Medial knee deviation results in positive femoral tilt.
• Tibial Lateral Tilt: Tibial Lateral Tilt is the angle between the tibia’s deviation in the frontal plane and vertical. Medial knee deviation results in positive tibial tilt.

Visual References:

Bodyweight Squat - Weight Shift

• Weight shifts during the bilateral squat may be a result of compensation. During the rehabilitation process, symmetry should improve indicating the patient can more effectively use the affected limb.

Stork Balance - Lateral Trunk Flexion

• The stork balance test can be used as a functional measure of the hip. Lateral trunk flexion or excessive hip adduction may be a result of hip abductor weakness.

Step Down - Pelvic Obliquity

• The step down motion is commonly implemented during the rehabilitation process to determine if the patient has sufficient eccentric quad strength and control. The patient will commonly reach with the contralateral leg resulting in pelvic drop if they can’t control their center of mass through the movement with their stance leg.

Unilateral Squat - Dynamic Valgus

• Dynamic Valgus has been identified as a risk factor for both ACL tear risk and patellofemoral syndrome. It is commonly identified, and tracked over time in the rehabilitation process. Page 2 in the clinician report definitions packet covers the way DARI quantifies dynamic valgus