Miologia_Greya

1

2

3

Muscle

Origin

Insertion

Innervation

Function

Obturator internus 1

Anterolateral wall of true

Medial surface of greater

Nerve to

Lateral rotation of the extended

pelvis (deep surface of

trochanter of femur

obturator

hip joint; abduction of flexed

obturator membrane and

internus L5, SI

hip

surrounding bone)

External urethral

5

From the inferior ramus of

Surrounds membranous

Perineal

Compresses the

sphincter

the pubis on each side and

part of urethra

branches of the

membranous urethra;

adjacent walls of the deep

pudendal nerve

relaxes during micturition

perineal pouch

(S2 to S4)

Deep transverse

6

Medial aspect of ischial

Perineal body

Perineal

Stabilizes the position of the

perineal

ramus

branches of the

perineal body

pudendal nerve

(S2 to S4)

Sphincter

8 Perineal body

Passes forward lateral to

Perineal

Functions as an accessory

urethrovaginalis

the vagina to blend with

branches of the

sphincter of the urethra (also

(in women only)

partner on other side

pudendal nerve

may facilitate closing the

anterior to the urethra

(S2 to S4)

vagina)

Muscle

Origin

Insertion

Innervation

Function

Ischiocavernosus

1

Ischial tuberosity and

Crus of penis and clitoris

Pudendal nerve

Move blood from crura into

ramus

(S2 to S4)

the body of the erect penis

and clitoris

Bulbospongiosus

2

In women: perineal body

In women: bulb of vestibule,

Pudendal nerve

Move blood from attached

In men: perineal body,

perineal membrane, body

(S2 to S4)

parts of the clitoris and penis

midline raphe

of clitoris, and corpus

into the glans

cavernosum

In men: removal of residual

In men: bulbospongiosus,

urine from urethra after

perineal membrane, and

urination; pulsatile emission

corpus cavernosum

of semen during ejaculation

Superficial transverse

3

Ischial tuberosity and

Perineal body

Pudendal nerve

Stabilize the perineal body

perineal

ramus

(S2 to S4)

1

1

2

2

3

3

Male

Female

Muscle

Origin

Insertion

Innervation

Function

Tensor

9 Lateral aspect of crest of ilium

Iliotibial tract of fascia lata

Superior gluteal

Stabilizes the knee in

fasciae latae

between anterior superior iliac

nerve (L4, L5, S1)

extension

spine and tubercle of the crest

6

9

1

3

5

4

2

Muscle

Origin

Insertion

Innervation

Function

Psoas major

1

Posterior abdominal wall

Lesser trochanter of femur

Anterior rami

Flexes the thigh at the hip

(lumbar transverse

[L1, L2, L3]

joint

processes, intervertebral

discs, and adjacent bodies

from TXII to LV and tendinous

arches between these points)

Iliacus

2

Posterior abdominal wall

Lesser trochanter of femur

Femoral nerve

Flexes the thigh at the hip

(iliac fossa)

[L2, L3]

joint

Vastus medialis

3

Femur—medial part of

Quadriceps femoris tendon

Femoral nerve

Extends the leg at the knee

intertrochanteric line,

and medial border of patella

[L2, L3, L4]

joint

pectineal line, medial lip of the

linea aspera, medial

supracondylar line

Vastus

4

Femur—upper two thirds of

Quadriceps femoris tendon

Femoral nerve

Extends the leg at the knee

intermedius

anterior and lateral surfaces

and lateral margin of patella

[L2, L3, L4]

joint

Vastus lateralis

5

Femur—lateral part of

Quadriceps femoris tendon

Femoral nerve

Extends the leg at the knee

intertrochanteric line, margin

[L2, L3, L4]

joint

of greater trochanter, lateral

margin of gluteal tuberosity,

lateral lip of the linea aspera

Rectus femoris

6

Straight head originates from

Quadriceps femoris tendon

Femoral nerve

Flexes the thigh at the hip

the anterior inferior iliac spine;

[L2, L3, L4]

joint and extends the leg at

reflected head originates from

the knee joint

the ilium just superior to the

acetabulum

Sartorius

7

Anterior superior iliac spine

Medial surface of tibia just

Femoral nerve

Flexes the thigh at the hip

inferomedial to tibial

[L2, L3]

joint and flexes the leg at the

tuberosity

knee joint

3

4

7

5

6

Muscle

Origin

Insertion

Innervation

Function

Gracilis

1 A line on the external surfaces

Medial surface of proximal

Obturator nerve

Adducts thigh at hip joint and

of the body of the pubis, the

shaft of tibia

[L2, L3]

flexes leg at knee joint

inferior pubic ramus, and the

ramus of the ischium

Adductor longus 3 External surface of body of

Linea aspera on middle

Obturator nerve

Adducts and medially rotates

pubis (triangular depression

one third of shaft of femur

(anterior division)

thigh at hip joint

inferior to pubic crest and

[L2, L3, L4]

lateral to pubic symphysis)

Adductor

5

Adductor part—ischiopubic

Posterior surface of proximal

Obturator nerve

Adducts and medially rotates

magnus

ramus

femur, linea aspera, medial

[L2, L3, L4]

thigh at hip joint

Hamstring part—ischial

supracondylar line

Sciatic nerve

tuberosity

Adductor tubercle and

(tibial division)

supracondylar line

[L2, L3, L4]

Obturator

6

External surface of obturator

Trochanteric fossa

Obturator nerve

Laterally rotates thigh at hip

externus

membrane and adjacent bone

(posterior division)

joint

[L3, L4]

6

2

4

5

1

3

Muscle

Origin

Insertion

Innervation

Function

Biceps femoris

1

Long head—inferomedial part

Head of fibula

Sciatic nerve

Flexes leg at knee joint; extends

of the upper area of the

[L5, S1, S2]

and laterally rotates thigh at hip

ischial tuberosity; short

joint and laterally rotates leg at

head—lateral lip of linea

knee joint

aspera

Semitendinosus

2

Inferomedial part of the upper

Medial surface of

Sciatic nerve

Flexes leg at knee joint and

area of the ischial tuberosity

proximal tibia

[L5, S1, S2]

extends thigh at hip joint; medially

rotates thigh at hip joint and leg at

knee joint

Semimembranosus

3

Superolateral impression on

Groove and adjacent

Sciatic nerve

Flexes leg at knee joint and

the ischial tuberosity

bone on medial and

[L5, S1, S2]

extends thigh at hip joint; medially

posterior surface of

rotates thigh at hip joint and leg at

medial tibial condyle

knee joint