Iliacus- Origin
Iliac Fossa
Sacrum
Iliacus- Insertion
Lesser Trochanter of the Femur
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Iliacus- Origin
Iliac Fossa
Sacrum
Iliacus- Insertion
Lesser Trochanter of the Femur
Iliacus- Action
Flexion of femur at hip joint
Helps maintain posture (integrity of spine)
Iliacus-Nerve Supply
Femoral nerve (L2-L4)
Psoas Major- Origin
Transverse processes and bodies of lumbar vertebrae (T12-L5)
Psoas Major- Insertion
Lesser trochanter of femur
Psoas Major- Action
Flexion of femur at hip joint
Helps maintain posture (integrity of spine)
Psoas Major- Nerve Supply
Femoral Nerve
Psoas Minor- Origin
Bodies/ T12-L1
Psoas Minor- Insertion
Iliopubic eminence/ Pubis
Psoas Minor- Action
Flexion of pelvic bone (upward movement)
Psoas Minor- Nerve Supply
L1 (sometimes L2)
Sartorius- Origin
Anterior superior iliac spine (ASIS)
Sartorius- Insertion
Superior Medial shaft of tibia
Sartorius- Action
Abducts & laterally rotates femur
Medially rotates leg
Assists flexion hip & knee when both are carried out
Sartorius- Nerve Supply
Femoral nerve
Rectus Femoris- Origin
Anterior Inferior Iliac Spine
Acetabulum/pelvic bone
Rectus Femoris- Insertion
Base/Patella
Rectus Femoris- Action
Extends leg at knee
Flexion at hip
Tonus of muscles play role in strengthening knee
Rectus Femoris- Nerve Supply
Femoral nerve
Vastus Lateralis- Origin
Greater trochanter/femur
Intertrochanteric line/femur
Lina aspera/femur
Vastus Lateralis- Insertion
Base/Patella
Vastus Lateralis- Action
Extends leg at knee
Tonus of muscles play role in strengthening knee
Vastus Lateralis- Nerve Supply
Femoral Nerve
Vastus Medialis- Origin
Linea aspera/femur
Intertrochanteric line/ femur
Vastus Medialis- Insertions
Base/patella
Vastus medialis- Action
Extends leg at knee
Tonus of muscles play role in strengthening knee
Vastus medialis- Nerve Supply
Femoral Nerve
Vastus Intermedius- Origin
Antero-lateral aspect of femur
Vastus Intermedius- Insertion
Base/patella
Vastus Intermedius- Action
Extends leg at knee
Tonus of muscles play role in strengthening knee
Vastus Intermedius- Nerve Supply
Femoral Nerve
Gracilis- Origin
Ramus/ischium
Inferior ramus/pubis
Gracilis-Insertion
Superior medial shaft/tibia
Gracilis- Action
Flexion/leg
Adducts femur
Gracilis- Nerve Supply
Obturator Nerve
Pectineus- origin
superior rami (pubis pectin)/pubis
Pectineus- insertion
Pectineal line/femur
linea aspera/femur
Pectineus- action
adducts femur
flexion/femur at hip joint
Pectineus- nerve supply
Femoral nerve and Obturator nerve
Adductor Longus- origin
Superior ramus/pubis
Adductor Longus-insertion
Linea aspera/femur
Adductor Longus- action
Adducts femur
Adductor Longus- nerve supply
Obturator nerve
Adductor Brevis-origin
Inferior ramus/pubis
Adductor Brevis-insertion
Pectineal line/femur
Linea aspera/femur
Adductor Brevis-action
Adducts femur
Adductor Brevis- nerve supply
Obturator nerve
Adductor Magnus- origin
Rami/ischium & pubis
Adductor Magnus- insertion
Linea aspera/femur
Adductor tubercle/femur
Adductor Magnus-action
Adducts femur
Extends femur @ hip joint
Adductor Magnus- nerve supply
Obturator nerve and Sciatic nerve
Tensor Fascia Lata- origin
Crest/ilium
Tensor Fascia Lata-insertion
Iliotibial tract
Tensor Fascia Lata-action
Flexes, abducts and medially rotates femur
Helps stabilize knee
Tensor Fascia Lata-nerve supply
Superior Gluteal nerve
Gluteus Maximus-origin
Posterior gluteal line/ilium
Sacrum &coccyx
Posterior ligaments of SI joint
Gluteus Maximus-insertion
Gluteal tuberosity/femur
Iliotibial tract
Gluteus Maximus-action
Extends &laterally rotates femur (for great strength when going form sitting to standing)
Stabilizes knee
Helps stabilize pelvic bone
Gluteus Maximus-nerve supply
Inferior Gluteal nerve
Gluteus medius- origin
External surface/ilium (between post and anterior gluteal lines)
Gluteus medius- insertion
Greater trochanter/femur
Gluteus medius-action
Abducts femur
Medially rotates femur
Helps steady pelvic bone when opp. foot is raised off ground
Gluteus medius- nerve supply
Superior Gluteal nerve
Gluteus Minimus- origin
External surface/ilium (between post and anterior gluteal lines)
Gluteus Minimus- insertion
Greater trochanter/femur
Gluteus Minimus-action
Abducts femur
Medially rotates femur
Helps steady pelvic bone when opp. foot is raised off ground
Gluteus Minimus- nerve supply
Superior Gluteal nerve
Piriformis- origin
Anterior surface/sacrum
Piriformis-insertion
Greater trochanter/femur
Piriformis-action
Laterally rotates femur
Piriformis- nerve supply
S1, S2
Superior Gemellus-origin
Spine/ischium
Superior Gemellus-insertion
Greater trochanter/femur
Superior Gemellus-action
laterally rotates femur
Superior Gemellus-nerve supply
L4, L5, S1, S2
Obturator Internus- origin
Internal surface/obturator membrane
Obturator Internus- insertion
Greater trochanter/femur
Obturator Internus- action
laterally rotates femur
Obturator Internus-nerve supply
L4, L5, S1, S2
Inferior Gemellus- origin
Ischial tuberosity
Inferior Gemellus-insertion
Greater trochanter/femur
Inferior Gemellus-action
laterally rotates femur
Inferior Gemellus-nerve supply
L4, L5, S1, S2
Obturator Externus-origin
External surface/obturator membrane
Obturator Externus- insertion
Trochanteric fossa/femur
Obturator Externus- action
laterally rotates femur
Obturator Externus-nerves supply
Obturator nerve
Quadratus Femoris- origin
Ischial tuberosity
Quadratus Femoris- insertion
Quadrate tubercle/femur
Quadratus Femoris- action
laterally rotates femur
Quadratus Femoris- nerve supply
L4, L5, S1, S2
Semitendinosus- origin
Ischial tuberosity
Semitendinosus-insertion
Medial condyle/tibia
Proximal post. shaft/tibia
Semitendinosus-action
Flexion/leg at knee joint
Stabilize hip
Extend femur
Medially rotates leg
Semitendinosus- nerve supply
Sciatic nerve
Semimembranosus- origin
Ischial tuberosity
Semimembranosus-insertion
Medial condyle/tibia
Semimembranosus- action
Flexion/leg at knee joint
Stabilize hip
Extend femur
Medially rotates leg
Semimembranosus- nerve supply
Sciatic nerve