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  • Flexed hip- medial rotation and almost zero contribution to abductionExtended hip- posterior fibers laterally rotate
  • STRONGER than MVO

2 2 Presentation Transcript

  • + ESS 3092: KINESIOLOGY Week 11- Wednesday
  • + Review 3
  • + What is the most common cause of sciatica? 4
  • + Sciatica Pain, tingling, or numbness produced by an irritation of the nerve roots that lead to the sciatic nerve Causes  The most common cause of sciatica is a bulging or ruptured disc, pressing against the nerve roots  It can also be a symptom of other conditions such as stenosis, bone spurs, arthritis or nerve root compression 5
  • + What are the two most powerful external rotator of the hip? 6
  • + External Rotators of the Hip External rotators  Piriformis  Gemellus Superior  Obturator Internus  Gemellus Inferior  Obturator Externus  Quadratus Femoris 7
  • + Piriformis  Sciatic nerve passes inferiorly  Tightness  Origin  Anterior surface of lateral sacrum Insertion  Greater trochanter of femur, along the upper medial surface Actions  Lateral rotation
  • + Gemellus Superior Origin Ischial spine Insertion Medial aspect of greater trochanter Actions External rotation
  • + Obturator Internus Origin Ischiopubic ramus, obturator membrane Insertion Medial aspect of greater trochanter Actions Lateral rotation
  • + Obturator Externus Origin Obturator membrane and the adjacent surfaces of the pubic body and pubic and ischial rami Insertion Medial aspect of greater trochanter Actions Lateral rotation
  • + Quadratus Femoris Origin Lateral border of ischial tuberocity Insertion Intertrochanteric crest Actions Lateral rotation
  • + How would you strengthen the external rotators of the hip? 13
  • + Strength of ER 60% > IR Challenge to condition  Difficult to apply force to rotation  Seated position, surgical tubing  Stand on one leg- turn body away Stretch  Seated position, manual resistance Strength & Conditioning External rotators
  • +
  • + Manual Stretch
  • 17
  • + Bony Landmarks- Femur  Proximal end  Head  Femoral neck  Greater trochanter  Lesser trochanter  Pectineal Line  Shaft  Linea aspera  Distal end  Medial & lateral condyles  Patellar surface
  • + Hip Joint Flexion/Extension- Muscles  FLEXION  Rectus femoris  Iliacus  Psoas major  Sartorius  Tensor fascia latae  EXTENSION  Semimembranous  Semitendinous  Biceps femoris  Gluteus maximus
  • Gluteus Maximus  Origin  Posterior surface of the sacrum and coccyx, posterior aspect of the ilium  Insertion  Proximal end of the IT band  Location  Posterior/lateral  Superficial  Action  Hip extension (powerful)  External rotation  Abduction (superior fibers) 21
  • Gluteus Medius  Origin  Lateral surface of the iliac spine  Insertion  Lateral aspect of the greater trochanter  Location  Lateral  Action  Hip abduction  Internal rotation (weak) 23
  • Gluteus Minimus  Origin  Lateral surface of the ilium  Insertion  Superior and anterior aspect of the greater trochanter  Location  Lateral  Action  Hip abduction  Internal rotation (weak) 24
  • Tensor Fasciae Latae  Origin  Anterior aspect of the lateral surface of the iliac crest and ASIS  Insertion  IT band to the lateral tubercle of the tibia  Location  Lateral  Action  Hip flexion  Hip abduction  Internal rotation (weak) 25
  • +  Combo of gluteus max and TFL  Crosses the knee (lateral femoral condyle)  Moves during flex & ext (knee)  Palpate- above femoral lat condyle Iliotibial Band
  • + IT Band Syndrome  Most common cause of lateral knee pain  Recurrent friction  Common in runners  High mileage, track (turning one way constantly or on crowned surfaces)  Common symptoms  Pain over the outside of the knee joint  Swelling at the location of discomfort  A snapping or popping sensation as the knee is bent  92% patients w/ IT Band Syndrome improved by strengthening the gluteus medius
  • + Knee Joint Movements- Muscles EXTENSION  Rectus femoris  Vastus medialis  Vastus intermedius  Vastus lateralis FLEXION  Biceps femoris  Semitendinous  Semimembranous  Sartorius (*)  Popliteus  Gastrocnemius  Gracilis ROTATION  Internal  Semitendinous  Semimembranous  Popliteus  Gracilis  External  Biceps femoris  Sartorius
  • + 29
  • + Knee Extensors  Generate power  Strongest muscle groups  3x stronger than antagonist  Stabilize patella  Reduce strain on MCL  Assist PCL  Posterior displacement  Too much extension works against the ACL
  • + Quadriceps Rectus Femoris  Origin  Anterior, inferior iliac spine, ilium above the acetabulum  Insertion  Patella, via patellar ligament to tibial tuberosity  Location  Anterior  Action  Knee extension  Hip flexion 31 Rectus Femoris
  • Rectus Femoris  The only biarticulate muscle of the extensors (Crosses 2 joints)  Contributes to knee extension best when hip is extended or hyperextended  Kicking  Strengthened  Knee extension (resistance)  Flexibility  Side-lying, full flexion while hip is extended
  • + Quadriceps Vastus Medialis  Origin  Medial lip of linea aspera; lower part of intertrochanteric line  Insertion  Patella, via quadriceps aponeurosis and patellar ligament to tibial tuberosity  Location  Anterior/medial  Action  Knee extension 33 Vastus Medialis
  • + Quadriceps Vastus Lateralis  Origin  Greater throchanter and lateral lip of linea aspera  Insertion  Patella, via patellar ligament to tibial tuberosity  Location  Anterior/lateral  Action  Knee extension 34 Vastus Lateralis
  • + Quadriceps Vastus Intermedius  Origin  Upper 2/3rds of the anterior and lateral surface of the femoral shaft  Insertion  Patella, via patellar ligament to tibial tuberosity  Location  Anterior/ deep  Action  Knee extension 35 Vastus intermedius
  • + How do you stretch the knee extensors? 36
  • + Knee Joint Movements- Muscles EXTENSION  Rectus femoris  Vastus medialis  Vastus intermedius  Vastus lateralis FLEXION  Biceps femoris  Semitendinous  Semimembranous  Sartorius  Popliteus  Gastrocnemius  Gracilis ROTATION  Internal  Semitendinous  Semimembranous  Popliteus  Gracilis  Sartorius  External  Biceps femoris
  • +Knee Flexors 2 joint muscles  Biceps femoris, semimem, semiten Originate – ischial tuberosity Rotate knee  2 to the inside (semitend, semimemb)  1 to the outside (biceps femoris)
  • + Hamstrings HDPE 26739 Musc les for coac hes Semitendinosus Biceps femoris Semimembranosus
  • + Biceps Femoris  Origin  Long head- medial surface of the ischial tuberosity  Short head- lateral lip of the linea aspera  Insertion  Fibular head, lateral colateral ligament, lateral condyle of the tibia  Location  Posterior/ Lateral  Action  Hip extension (long head only)  Knee flexion  External rotation (w/ hip flexion) 40
  • + Biceps Femoris Two heads Provides lateral support Produces external rot (of lower leg) Assists ACL to stabilize (prevents ant displacement) Strengthen  Hamstring curls w/ ext rot of knee
  • + Semitendinosus  Origin  Ischial tuberosity  Insertion  Medial surface of the proximal tibia  Location  Posterior/ medial  Action  Knee flexion  Hip flexion  Internal rotation (w/ hip flexion) 42 Semitendinosus
  • + Semimembranosus  Origin  Ischial tuberosity  Insertion  Medial condyle of the tibia  Location  Posterior/ medial  Action  Hip extension  Knee flexion  Internal rotation 43 Semimembranosus
  • + Semimembranosus Provides medial stability Assists ACL to prevent anterior displacement Internal rotation Strengthen  Leg curls, internal rotation of knee
  • + Sartorius  Origin  Anterior, superior iliac spine  Insertion  Promixal aspect of the medial surface of the shaft of the tibia  Location  Anterior/ superficial  Insertion on the lateral/posterior side  Action  Knee extension  Hip flexion  Hip external rotation  Hip abduction
  • + Sartorius  “Tailor’s Muscle”  Longest muscle  2 joints:  Knee (Flexion- comes around behind the knee)  Hip (Flexion, abduction, external rotation)  Weak during knee & hip flexion  Sitting and crossing knees  Knees extended  Effective hip flexor
  • + How do you stretch the knee flexors? 47
  • Movement Analysis: Anterior Pelvic Tilt/Posterior Pelvic Tilt Plane Axis Action Agonist Antagonist 48 PHASE 1 2