Hip and Thigh Synergists

Question 1

Hip Abduction

Answer 1

Gluteus Maximus(all fibers) – Inferior Gluteal
Gluteus Medius(all fibers)– Superior Gluteal
Gluteus Minimus– Superior Gluteal
Tensor Fasciae Latae– Superior Gluteal
Sartorius– Femoral
Piriformis(when hip is flexed)– Sacral Plexus

Question 2

Hip Adduction

Answer 2

Adductor Magnus-- Obturator
Adductor Longus-- Obturator 
Adductor Brevis-- Obturator 
Pectineus-- Femoral
Gracilis-- Obturator 
Gluteus Maximus(lower fibers)-- Inferior Gluteal

Question 3

Knee Flexion

Answer 3

Biceps Femoris-- Sciatic
Semitendinosus-- Sciatic
Semimembranosus-- Sciatic
Gracilis-- Obturator 
Sartorius-- Femoral 
Gastrocnemius-- Tibial
Popliteus-- Tibial
Plantaris(weak)-- Tibial

Question 4

Knee Extension

Answer 4

Rectus Femoris– Femoral
Vastus Lateralis– Femoral
Vastus Medialis– Femoral
Vastus Intermedius– Femoral

Question 5

Medial Rotation w/ Flexed Knee

Answer 5

Semitendinosus-- Sciatic
Semimembranosus-- Sciatic
Gracilis-- Obturator 
Sartorius-- Femoral 
Popliteus-- Tibial

Question 6

Lateral Rotation w/ Flexed Knee

Answer 6

Biceps Femoris– Sciatic

Question 7

Coxal (hip joint) Flexion

Answer 7

Psoas Major- Lumbar Plexus
Iliacus- Femoral
Tensor Fasciae Latae- Superior Gluteal
Sartorius- Femoral
Rectus Femoris- Femoral
Gluteus Medius(anterior fibers)- Superior Gluteal
Gluteus Minimus- Superior Gluteal
Adductor Longus(assists)- Obturator
Pectineus(assists)- Femoral, Obturator
Adductor Brevis(assists)- Obturator
Adductor Mangus(assists)- Obturator, Sciatic

Question 8

Coxal (hip joint) Extension

Answer 8

Gluteus Maximus(all fibers)- Inferior Gluteal
Biceps Femoris(long head)- Sciatic
Semitendinosus-Sciatic
Semimembranosus- Sciatic
Adductor Mangus(posterior fibers)- Obturator, Sciatic
Gluteus Medius(posterior fibers)- Superior Gluteal

Question 9

Coxal (hip joint) Medial Rotation or Internal Rotation

Answer 9

Gluteus Medius(anterior fibers)- Superior Gluteal
Gluteus Minimus- Superior Gluteal
Tensor Fasciae Latae- Superior Gluteal
Adductor Mangus- Obturator, Sciatic
Adductor Longus- Obturator
Adductor Brevis- Obturator
Pectineus- Femoral, Obturator
Gracilis- Obturator
Semitendinosus(assists)- Sciatic
Semimembranosus(assists)- Sciatic

Question 10

Coxal (hip joint) Lateral Rotation or External Rotation

Answer 10

Gluteus Maximus(all fibers)- Inferior Gluteal
Piriformis- Sacral Plexus
Quadratus Femoris- Sacral Plexus
Obturator Internus- Sacral Plexus
Obturator Externus- Obturator
Gemellus Superior- Sacral Plexus
Gemellus Inferior- Sacral Plexus
Gluteus Medius(posterior fibers)- Superior Gluteal
Psoas Major-Lumbar Plexus
Iliacus- Femoral
Sartorius- Femoral
Biceps Femoris(assists, long head)- Sciatic