Prime Motions &
Muscles 1
Muscles 1
What five hip muscles primarily perform hip adduction?
Medial Hip Muscle Group (Pectineus, Adductor Magnus, Adductor Longus, Adductor Brevis, and Gracilis)
Acting alone, this massive muscle produces extension and lateral rotation at the hip joint
Gluteus Maximus
What is the bony part of your pelvis that you sit on?
Ischial Tuberosity
What is the capsular pattern of the hip?
Flexion, Abduction, Medial Rotation
What is the purpose of menisci of the knee joint?
Help distribute forces evenly throughout the joint
What muscle of the hip allows you to kick a ball?
What are the three muscles that are known as the Hamstrings?
Semimembranosus, Semitendinosus, Biceps femoris
What are the bones that make up the hip joint and what are technical names for the hip joint?
Femur and acetabulum; Iliofemoral or Acetabulofemoral
What type of joint is the hip joint and how many degrees of freedom?
Ball and socket with three degrees of freedom
What type of joint is the knee joint and how many degrees of freedom?
Hinge joint with two degrees of freedom
Provide three muscles that perform hip lateral rotation?
Gluteus maximus, Obturator externus, Obturator internus, Piriformis, Gemelli, Sartorius
The medial surface of the pelvis is dominated by a pair of muscles that are powerful hip flexors, when combined, what are they named?
Iliopsoas
What are the three bones that make up the knee joint?
Femur, Patella, and Tibia
Patellar loading is 7x your body weight during what activity?
What is the loose packed position of the knee?
25 degrees of flexion
What are the three tendons that make up the Pes Anserine?
Sartorius, Gracilis, and Semitendinosus
What actions does the Sartorious help perform? (4)
Hip Flexion, Knee Flexion, External Rotation, and Abduction
What two articulations make up the knee joint?
Tibiofemoral and Patellofemoral
What range of motion is the patella most congruent with the femoral condyles?
60-90 degrees of flexion
Differentiate Genu Varum vs Genu Valgum
Genu Valgum - medial tibiofemoral angle is greater than 185° (“knock knees”)
Genu Varum - medial tibiofemoral angle is 175° or less (“bow legs”)
What are the motions possible at the hip? Identify the degrees of motion possible for each of the previously stated motions.
Flexion: 0-120 degrees
Extension: 0-30 degrees
IR: 0-45 degrees; ER: 0-45
Abd: 0-45; Add: 0-30
The Quadriceps are made up of what four muscles? Which one only crosses the hip?
Rectus Femoris is the only one that crosses the hip; Vastus Lateralis, Vastus Medialis, and Vastus Intermedialis.
What differentiates a hip fracture vs a femoral fracture?
Hip fracture = proximal 1/3rd
What associated motions of the Vertebral Column and Hip create Anterior Tilt of the Pelvic Girdle? What associated motions of the Vertebral Column and Hip create Posterior Tilt?
Hyperextension of the Vertebral Column and Flexion of the Hip
Flexion of the Vertebral Column and Extension of the Hip
This angle is between the Quadriceps muscle and the Patellar Tendon. How is this angle determined? Is this angle greater in men or women?
Q Angle or Patellofemoral Angle; Line from ASIS to midpoint of patella to tibial tuberosity. Wider in Women