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Lower Extremity

Structure, Nerves, Blood supply, and muscles

Head of femur Ball
Acetabulum Socket
Ball and Socket Multiaxial
Femur Longest and largest bone in the body
3 bones hip joint is made of? Ilium, Ishchium, Pubis
Capsular ligament Runs from edge of acetabulum to intertrochanteric line/ crest
3 ligaments strengthen the capsular ligament Iliofemoral, Pubofemoral, Ischiofempral
Acetabular labrum Fibrocartilaginous rim on outer edge of acetabulum -helps deepen socket
Transverse acetabular ligament Spans a small notch in lower portion of acetabular labrum (going sideways)
Ligamentum capitis femoris (Ligamentum teres) Attaches head of femur to acetabulum
Name the muscle which has it’s origins from Transverse process of T12-L5 and inserts into the Lesser Trochanter of the femur? Psoas major
What is the insertion point for Sartorius muscle? T12-L5
What long tendon/band does the Tensor Facsha Lata and Glut maximus become before inserting into the Tibial bone? iliotibial band
T/F All hip flexors can anteriorly tilt the pelvis False Psoas major cannot aneriorly tilt
Iliotibial band -Attachment for gluteus maximus and TFL -Stabilizes against lateral movement of the knee (varus) and extension/hyper-extension -Helps lock knee in standing
T/F All 3 hamstring muscles can posteriorly tilt the pelvis on a fixed femur True
T/F All hip adductors innervate obturator False Adductor magnus that splits into 2 nerves
What muscle does lumbar plexus L1-L3 innervate? Psoas Major
Muscles going towards front do what action? hip flexion
Muscles going towards back do what action? hip extension
Hip Flexion Psoas major, Iliacus, Sartorius, Tensor fascia latae, Rectus femoris, Pectineus, Gluteus medius: Anterior, GLuteus minimus: Anterior , Adductor magnus: anterior
Hip Extension Gluteus maximus, Biceps femoris Long head, Semimembranosus, Semitendinosus Adductor magnus: posterior Gluteus medius: posterior, Gluteus minimus: posterior
Hip ABduction Gluteus medius, Gluteus minimus, Sartorius, Tensor fascia lata, Piriformis, Gluteus maximus, upper portion
Hip ADduction Adductor magnus, Adductor brevis, Adductor longus, Pectinius, Psoas major, Iliacus, Quadratus femoris, Bicep femoris, Semimebranosus, Semitendinosus, Gracillis
Hip external rotation Gluteus Maximus, Piriformis, Psoas major, Iliacus Gluteus medius, posterior, Adductor magnus, posterior, Deep Rotators
Hip internal rotation Tensor fascia latae, Gluteus minimus, Gracilis, Gluteus medius, anterior, Adductor magnus, anterior
knee flexion Biceps Femoris, Semimembranosus, Semitendinosus, Sartorius, Gastrocnemius Plantaris, Popliteus
knee extension Rectus femoris, Vastus intermedus, Vastus medialis, Vastus lateralis, Sartorius
Synovial joint consists of what 3 bones? Femer, tibia, patella
Genu varum (bow leg) Lateral prevents adduction of the tibia on the femer
Genu valgum (knock-knee) Medial prevents abduction of the tibia on the femur
Posterior cruciate Prevents posterior dislocation of the tibia
Anterior cruciate Prevents anterior dislocation of the tibia
Posterior cruciate & Anterior cruciate Together, limit hyperextension
Menisci -Enhance stability by deepening the joint -Reduce joint friction -Act as shock absorbers by reducing the stress (load/unit area)
Created by: rmart11