Biomechanics 2nd Practical Q's - Practice

1. Angle of inclination

2. Coxa Vara

*(Normal: 125º; Coxa Vara: <125º; Coxa Valga: >125º)

3. Genu Valgum

1. What angle is being shown here?

2. What does this angle measured cause at the hip?

3. What does this result in at the knee?

1. Anteversion

2. Standing in IR (Toeing in)

*In retroversion, there is an ER tendency (duck)

1. Is this anteversion or retroversion?

2. What is the tendency seen in order to improve joint congruency?

1. Center Edge Angle: Measures the extent to which the acetabulum covers the top of the femoral head

(Normal: ~25-35º)

1. What angle is being shown here in the frontal plane?

1. Acetabular anteversion angle: Measures the extent to which the acetabulum covers the front of the femoral head

(Normal: ~20º)

2. A reduced center edge angle

1. What angle is being shown here in the horizontal plane?

2. An increased angle can be a result from?

1. Medial Roll & Lateral Glide

1. In IR (Femoral-on-pelvic), what is the roll and glide?

1. Inferior & Med Roll with a Superior & Lat Glide

1. In adduction (Femoral-on-pelvic), what is the roll and glide?

1. Spin

1. In flexion (Femoral-on-pelvic), what is the roll and glide?

1. Increases the Q-angle

*(Normal: 10-15º; Abnormal: >20º)

1. Excessive Genu Valgum does what to the q-angle?

1. Tibial Anterior roll & Anterior Glide

2. ER during the last 30-0º (due to medial femoral condyle curve)

1. In OKC Tibal-on-femoral extension, what is the roll and glide?

2. What movement at the tibia must occur for the screw-home mechanism to work?

1. Femoral Posterior roll & Anterior glide

1. In CKC Femoral-on-tibial flexion, what is the roll and glide?

Terminal Stance

What stance is this according to Ranchos Los Amigos?

Initial Swing

What stance is this according to Ranchos Los Amigos?

Pre Swing

What stance is this according to Ranchos Los Amigos?