Pelvis and Hip PAOIN

Psoas Major - Origin and Insertion

Origin: Bodies and transverse processes of lumbar vertebrae Insertion: Lesser trochanter

Psoas Major - Purposeful Activity and Action

Purposeful Activity: Hiking, ascending stairs Action: With the origin fixed: Flex the hip (coxal joint) Externally (laterally) rotate the hip (coxal joint) With the insertion fixed: Flex the trunk toward the thigh Tilt pelvis anteriorly Unilaterally: Assist to laterally flex the lumbar spine

Psoas Major - Nerve Innervation

Nerve Innervation: Lumbar plexus L1 to L4

Iliacus - Origin and Insertion

Origin: Iliac fossa Insertion: Lesser trochanter

Iliacus - Purposeful Activity and Action

Purposeful Activity: Climbing a ladder, cycling Action: With the origin fixed: Flex the hip (coxal joint) Externally (laterally) rotate the hip (coxal joint) With the insertion fixed: Flex the trunk toward the thigh Tilt pelvis anteriorly

Iliacus - Nerve Innervation

Nerve Innervation: Femoral L1 to L4

Gluteus Maximus - Origin and Insertion

Origin: Coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments Insertion: Iliotibial tract (upper fibers) and gluteal tuberosity (lower fibers)

Gluteus Maximus - Purposeful Activity and Action

Purposeful Activity: Ballroom dancing, doing gymnastics Action: All fibers: Extend the hip (coxal joint) Externally (laterally) rotate the hip (coxal joint) Abduct the hip (coxal joint) Lower fibers: Adduct the hip (coxal joint)

Gluteus Maximus - Nerve Innervation

Nerve Innervation: Inferior gluteal L5, S1 and S2

Gluteus Medius - Origin and Insertion

Origin: Gluteal surface of ilium, between posterior and anterior gluteal lines, just below the iliac crest Insertion: Lateral aspect of greater trochanter

Gluteus Medius - Purposeful Activity and Action

Purposeful Activity: Walking (stabilizes pelvis), doing yoga Action: All fibers: Abduct the hip (coxal joint) Anterior fibers: Flex the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Posterior fibers: Extend the hip (coxal joint) Externally (laterally) rotate the hip (coxal joint)

Gluteus Medius - Nerve Innervation

Nerve Innervation: Superior gluteal L4 and L5, S1

Gluteus Minimus - Origin and Insertion

Origin: Gluteal surface of the ilium between the anterior and inferior gluteal lines Insertion: Anterior aspect of greater trochanter

Gluteus Minimus - Purposeful Activity and Action

Purposeful Activity: Doing tai chi, ice skating Action: Abduct the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Flex the hip (coxal joint)

Gluteus Minimus - Nerve Innervation

Nerve Innervation: Superior gluteal L4 and L5, S1

Tensor Fasciae Latae and Iliotibial Tract - Origin and Insertion

Origin: Iliac crest, posterior to the ASIS Insertion: Iliotibial tract

Tensor Fasciae Latae and Iliotibial Tract - Purposeful Activity and Action

Purposeful Activity: Running, cycling Action: Flex the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Abduct the hip (coxal joint)

Tensor Fasciae Latae and Iliotibial Tract - Nerve Innervation

Nerve Innervation: Superior gluteal L4 and L5, S1

Adductor Magnus - Origin and Insertion

Origin: Inferior ramus of the pubis, ramus of ischium, and ischial tuberosity Insertion: Medial lip of linea aspera and adductor tubercle

Adductor Magnus - Purposeful Activity and Action

Purposeful Activity: Doing gymnastics, wrestling Action: Adduct the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Assist to flex the hip (coxal joint) Internally (medially) rotate the flexed knee (tibiofemoral joint) Posterior fibers: Extend the hip (coxal joint)

Adductor Magnus - Nerve Innervation

Nerve Innervation: Obturator L2 to L4 and sciatic L4 and L5, S1

Adductor Longus - Origin and Insertion

Origin: Pubic tubercle Insertion: Pectineal line and medial lip of linea aspera

Adductor Longus - Purposeful Activity and Action

Purposeful Activity: Doing gymnastics, wrestling Action: Adduct the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Assist to flex the hip (coxal joint) Internally (medially) rotate the flexed knee (tibiofemoral joint)

Adductor Longus - Nerve Innervation

Nerve Innervation: Obturator L2 to L4

Pectineus - Origin and Insertion

Origin: Superior ramus of pubis Insertion: Pectineal line of femur

Pectineus - Purposeful Activity and Action

Purposeful Activity: Doing gymnastics, wrestling Action: Adduct the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Assist to flex the hip (coxal joint) Internally (medially) rotate the flexed knee (tibiofemoral joint)

Pectineus - Nerve Innervation

Nerve Innervation: Femoral and obturator L2 to L4

Adductor Brevis - Origin and Insertion

Origin: Inferior ramus of pubis Insertion: Pectineal line and medial lip of linea aspera

Adductor Brevis - Purposeful Activity and Action

Purposeful Activity: Doing gymnastics, wrestling Action: Adduct the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Assist to flex the hip (coxal joint) Internally (medially) rotate the flexed knee (tibiofemoral joint)

Adductor Brevis - Nerve Innervation

Nerve Innervation: Obturator L2 to L4

Gracilis - Origin and Insertion

Origin: Inferior ramus of pubis Insertion: Proximal, medial shaft of tibia at pes anserinus tendon

Gracilis - Purposeful Activity and Action

Purposeful Activity: Doing gymnastics, wrestling Action: Adduct the hip (coxal joint) Internally (medially) rotate the hip (coxal joint) Flex the knee (tibiofemoral joint) Internally (medially) rotate the flexed knee (tibiofemoral joint)

Gracilis - Nerve Innervation

Nerve Innervation: Obturator L2 to L4

Piriformis - Origin and Insertion

Origin: Anterior surface of sacrum Insertion: Superior aspect of greater trochanter

Piriformis - Purposeful Activity and Action

Purposeful Activity: Getting out of a vehicle, hip-hop dancing Action: Externally (laterally) rotate the hip (coxal joint) Abduct the hip when the hip is flexed

Piriformis - Nerve Innervation

Nerve Innervation: Sacral plexus L5, S1 and S2

Quadratus Femoris - Origin and Insertion

Origin: Lateral border of ischial tuberosity Insertion: Intertrochanteric crest, between the greater and lesser trochanters

Quadratus Femoris - Purposeful Activity and Action

Purposeful Activity: Getting out of a vehicle, hip-hop dancing Action: Externally (laterally) rotate the hip (coxal joint)

Quadratus Femoris - Nerve Innervation

Nerve Innervation: Sacral plexus L4 and L5, S1 and S2

Obturator Internus - Origin and Insertion

Origin: Obturator membrane and inferior surface of obturator foramen Insertion: Medial surface of greater trochanter

Obturator Internus - Purposeful Activity and Action

Purposeful Activity: Getting out of a vehicle, hip-hop dancing Action: Externally (laterally) rotate the hip (coxal joint)

Obturator Internus - Nerve Innervation

Nerve Innervation: Sacral plexus L5, S1 and S2

Obturator Externus - Origin and Insertion

Origin: Rami of pubis and ischium, obturator membrane Insertion: Trochanteric fossa of femur

Obturator Externus - Purposeful Activity and Action

Purposeful Activity: Getting out of a vehicle, hip-hop dancing Action: Externally (laterally) rotate the hip (coxal joint)

Obturator Externus - Nerve Innervation

Nerve Innervation: Obturator L3 and L4

Gemellus Superior - Origin and Insertion

Origin: Ischial spine Insertion: Medial surface of greater trochanter

Gemellus Superior - Purposeful Activity and Action

Purposeful Activity: Getting out of a vehicle, hip-hop dancing Action: Externally (laterally) rotate the hip (coxal joint)

Gemellus Superior - Nerve Innervation

Nerve Innervation: Sacral plexus L5, S1 and S2

Gemellus Inferior - Origin and Insertion

Origin: Ischial tuberosity Insertion: Medial surface of greater trochanter

Gemellus Inferior - Purposeful Activity and Action

Purposeful Activity: Getting out of a vehicle, hip-hop dancing Action: Externally (laterally) rotate the hip (coxal joint)

Gemellus Inferior - Nerve Innervation

Nerve Innervation: Sacral plexus L4 and L5, S1 and S2