USAHS Neuroscience correctly answered graded A+ 2023/2024

USAHS NeuroscienceWhat is Q angle (patellofemoral angle) - correct answer The angle between the quadriceps muscle (primarily the rectus femoris muscle) and the patella tendon Male/female differences in Q angle - correct answer The angle tends to be greater in females because the pelvis is generally wider in women Normal Q angle - correct answer Knee extension ranges from 13-19 degrees in normal individuals Genuvarum - correct answer Bowlegged/ problem in which the distal segments are positioned more medially than normal Genuvalgum - correct answer knock knees/ problem in which the distal segments are positioned more laterally than normal. Knees tend to touch while ankles are apart. Genurecurvatum - correct answer Back knees/ hyperextension, ROM goes beyond 0 degrees extension During an open chain knee extension what kind of rotation takes place in tibia in relation to femur? For example, the tibia rotates laterally on the femur. During open chain knee extension, Femur does not rotate on tibia, but tibia rotates on femur. On the other hand, during closed chain reaction, the femur rotates on tibial condyle - correct answer Open chain- the knee has a concave on convex relationship where the concave tibial condyles glide posteriorly with flexion and anteriorly with extension, while the distal end of the tibia moves in the same direction Closed chain- the knee has a convex on concave relationship, but is reversed when non weight bearing When you come up from sit to standing, what happens at the end of knee extension (now this is the closed chain reaction). At the end of knee extension, the femur spins (medially or laterally) to lock into place for optimal standing stability - correct answer When going from sit to stand, the femur must glide posteriorly on the tibia as it rolls into extension