practicum 2

Action of Psoas minor

Flexion of pelvis on lumbar spine and vice versa

Origin of Iliacus

-Iliac fossa

-Iliac crest

Insertion of Iliacus

-Lesser trochanter

Action of Iliacus

-Flexes hip

-External rotation

of hip

-Abduction of hip

Innervation of iliacus

Femoral; L2, L3, L4

Origin of Gluteus maximus

-Posterior gluteal

line of ilium

-Dorsal surface of

sacrum and coccyx

-Sacrotuberous

ligament

Insertion of Gluteus maximus

Upper fibers:

-Iliotibial tract

(which inserts into

lateral condyle of

tibia)

Lower Fibers:

-Gluteal tuberosity

of femur

Action of Gluteus maximus

Hip extension, external rotation
• Lower fibers: hip adduction

• Upper fibers: hip abduction, and through its insertion into the IT

tract, help stabilize the knee in extension

Origin of Gluteus medius

External surface of

iliac crest

-Anterior gluteal

line

-Posterior gluteal

line

Insertion of Gluteus medius

Greater trochanter

of femur

Action of Gluteus medius

Hip abduction
• Anterior fibers: hip internal rotation, flexion

• Posterior fibers: hip external rotation, extension

Origin of Gluteus minimus

External surface of ilium between anterior and inferior gluteal lines

Insertion of Gluteus minimus

Greater trochanter of femur

Action of Gluteus minimus

Hip abduction, internal rotation, and (secondary) flexion

Origin of Tensor Fascia Lata

-Iliac crest of ilium

-Anterior superior

iliac spine of ilium

Insertion of Tensor Fascia Lata

iliotibial tract

Action of Tensor Fascia Lata

Hip flexion, internal rotation, and abduction, may assist in knee extension

Origin of Piriformis

-Anterior surface of

sacrum

-Greater sciatic

foramen of ilium

-Sacrotuberous

ligament

Insertion of Piriformis

Superior border of the greater trochanter of femur

Action of Piriformis

Hip external rotates extended hip and (secondary) abducts flexed hip

Origin of Obturator internus

-Posterior surface

of obturator

membrane and

surrounding bones

Insertion of Obturator internus

Medial surface of greater trochanter of femur

Action of Obturator internus

Hip external rotation and

abducts flexed hip

Origin of Obturator externus

Rami of pubis and ischium, external surface of obturator membrane

Insertion of Obturator externus

Trochanteric fossa of the femur

Action of Obturator externus

Hip external rotation, adduction

Origin of Gemellus superior / Superior gemellus

-Ischial spine of

ischium

Insertion of Gemellus superior / Superior gemellus

medial surface of greater trochanter of femur

Action of Gemellus superior / Superior gemellus

Hip external rotation and

abducts flexed hip

Origin of Gemellus inferior / Inferior gemellus

-Ischial tuberosity

of ischium

Insertion of Gemellus inferior / Inferior gemellus

medial surface of greater trochanter of femur

Action of Gemellus inferior / Inferior gemellus

Hip external rotation and

abducts flexed hip

Origin of Quadratus femoris

lateral border of the ischial tuberosity of ischium

Insertion of Quadratus femoris

-Intertrochanteric

crest of femur and

area inferior to it

Action of Quadratus femoris

Hip external rotation

Origin of Psoas major

-Transverse

process/body of

lumbar vertebrae

-Intervetebral

discs

Insertion of Psoas major

Lesser trochanter of femur

Action of Psoas major

-Flexes hip

-External rotation

of hip

-Abduction of hip

Innervation of Psoas major

Lumbar plexus; L1, L2, L3, L4

Innervation of Gluteus maximus

Inferior gluteal nerve, L5, S1, S2

Innervation of Gluteus medius

Superior gluteal; L4, L5, S1

Innervation of Gluteus minimus

Superior gluteal; L4, L5, S1

Innervation of Tensor Fascia Lata

Superior gluteal; L4, L5, S1

Innervation of Piriformis

sacral plexus Nerve to piriformis (L5) S1, S2

Innervation of Obturator internus

sacral plexus; Nerve to obturator

internus L5, S1, S2

Innervation of Obturator externus

obturator nerve; L3, L4

Innervation of Gemellus superior / Superior gemellus

sacral plexus; Nerve to obturator

internus L5, S1, S2

Innervation of Gemellus inferior / Inferior gemellus

sacral plexus; Nerve to quadratus

femoris L4, L5, S1

Innervation of Quadratus femoris

sacral plexus; Nerve to quadratus

femoris L4, L5, S1

O Sartorius

-Anterior superior

iliac spine of ilium

I Sartorius

-Proximal part of

medial tibia near

anterior border

A Sartorius

◦ Hip flexion, external rotation, and abduction

◦ Knee flexion and internal rotation

N Sartorius

Femoral; L2, L3, L4

O Rectus femoris

-Anterior inferior

iliac spine

-Ilium superior to

acetabulum

I Rectus femoris

-Patella through

quadriceps tendon

-Tibial tuberosity of

tibia through

patellar ligament

A Rectus femoris

◦ Hip flexion

◦ Knee extension

N Rectus femoris

Femoral; L2, L3, L4

O Vastus Medialis and Vastus

Medialis Obliquus

-Intertrochanteric

line of femur

-Medial lip of linea

aspera

-Patella through

quadriceps tendon

I Vastus Medialis and Vastus

Medialis Obliquus

-Patella through

quadriceps tendon

-Tibial tuberosity of

tibia through

patellar ligament

A Vastus Medialis and Vastus

Medialis Obliquus

Knee extension

N Vastus Medialis and Vastus

Medialis Obliquus

Femoral; L2, L3, L4

O Vastus Lateralis

-Greater

trochanter of

femur

-Proximal ½ of

linea aspera of

femur

I Vastus Lateralis

-Patella through

quadriceps tendon

-Tibial tuberosity of

tibia through

patellar ligament

A Vastus Lateralis

Knee extension

N Vastus Lateralis

Femoral; L2, L3, L4

O Vastus Intermedius

-Proximal 2/3 of

anterior/lateral

femur

-Distal ½ of linea

aspera

I Vastus Intermedius

-Patella through

quadriceps tendon

-Tibial tuberosity of

tibia through

patellar ligament

A Vastus Intermedius

Knee extension

N Vastus Intermedius

Femoral; L2, L3, L4

O Biceps femoris

Long head: ischial

tuberosity of

ischium

Short head: linea

aspera and lateral

supracondylar

line of femur

I Biceps femoris

-Lateral side of head of fibula

-(Tendon split by) lateral collateral ligament of knee

A Biceps femoris

Knee flexion and external rotation

◦ LH: hip extension and (secondary) external rotation

N Biceps femoris

◦ LH: tibial; L5, S1, S2, S3

◦ SH: common fibular; L5, S1, S2

O Semimembranosus

Ischial tuberosity of ischium

I Semimembranosus

Posterior part of the medial

condyle of the tibia

A Semimembranosus

Knee flexion and internal rotation

◦ Hip extension and internal rotation

N Semimembranosus

Tibial; L4, L5, S1, S2

O Semitendinosus

Ischial tuberosity of ischium

I Semitendinosus

Superior and

medial surface of

tibia (pes

anserine)

A Semitendinosus

Knee flexion and internal rotation

◦ Hip extension and internal rotation

N Semitendinosus

Tibial; L4, L5, S1, S2

O Gracilis

-Inferior ½ of pubic

symphysis

-Inferior pubic

ramus of pubis

I Gracilis

-Medial tibia

-Distal to medial

condyle of tibia

A Gracilis

• Hip adduction

• knee flexion and internal rotation

N Gracilis

Obturator, L2, L3, L4

O Pectineus

-Superior ramus of

pubis

I Pectineus

Pectineal line of femur

A Pectineus

Hip flexion, adduction

N Pectineus

obturator and femoral nerves; L2, L3, L4

O Adductor longus

Anterior surface of pubis

I Adductor longus

Middle 1/3 of medial lip linea aspera

A Adductor longus

hip adduction, flexion, internal rotation

N Adductor longus

Obturator, L2, L3, L4

O Adductor brevis

inferior ramus of the pubis

I Adductor brevis

distal pectineal line and proximal ½ of linea aspera of

femur

A Adductor brevis

Hip adduction, flexion, internal rotation

N Adductor brevis

obturator nerve, L2, L3, L4

O Adductor Magnus

◦ Anterior fibers/Adductor part: Inferior pubic ramus, ramus of

ischium

◦ Posterior fibers/ Hamstring part: ischial tuberosity

I Adductor Magnus

Medial to gluteal tuberosity, middle of linea aspera, medial

supracondylar ridge of femur, and adductor tubercle of femur

A Adductor Magnus

Hip adduction

◦ Anterior fibers: hip flexion

◦ Posterior fibers: hip extension