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Lower Limbs
Origins/Insertions/Actions
14
Anatomy
Undergraduate 1
11/27/2008

Additional Anatomy Flashcards

 


 

Cards

Term
[image]
Definition

Origin:

• pubis bone

 

Insertion:

• Unites with opposite puborectalis to form a muscluar sling

 

Nerve: sacral nerve

 

Action:

supports the pelvic viscera, raises the pelvic floor for coughing, vomiting, urinating and defecating

Term
[image]
Definition

Origin:

• pubis bone

 

Insertion:

• coccyx

 

Nerve: sacral nerve

 

Action:

supports the pelvic viscera, raises the pelvic floor for coughing, vomiting, urinating and defecating

Comments:

Main part of the levator ani

Term
[image]
Definition

Origin:

• obturator foramen, membrane and the ischial spine

 

Insertion:

• coccyx

 

Nerve: sacral nerve

 

Action:

supports the pelvic viscera, raises the pelvic floor for coughing, vomiting, urinating and defecating

Term
[image]
Definition

Origin:

• ischial spine

 

Insertion:

• coccyx

 

Nerve: sacral nerve

 

Action:

supports levator ani muscles (similar actions)

 

Comments:

• forms the posterior part of the pelvic floor

Term
[image]
Definition

Origin:

• ilium (and iliac crest) posterior to posterior gluteal line

• posterior sacrum & coccyx

• sacrotuberous ligament

• posterior sacroiliac ligaments

 

Insertion:

• gluteal tuberosity (30%)

• iliotibial tract (70%)

– Iliotibial tract inserts onto lateral condyle of tibia

 

Nerve: inferior gluteal nerve

 

Action(s):

extension

lateral rotation

Comments:

largest and most superficial gluteal muscle

Term
[image]
Definition

Origin:

• external surface of ilium between anterior

and posterior gluteal lines

 

Insertion:

• greater trochanter (lateral surface)

 

Nerve: superior gluteal nerve

 

Action(s):

abduction

medial rotation

Term
[image]
Definition

Origin:

• external surface of ilium between the anterior and inferior gluteal lines

 

Insertion:

• greater trochanter (anterior surface)

 

Nerve: superior gluteal nerve

 

Action(s):

abduction

medial rotation

Comments:

• lies deep to gluteus medius

• during gait, its actions are similar to that of gluteus medius

Term
[image]
Definition

Origin:

• anterior surface of sacrum and sacrotuberous ligament

 

Insertion:

• greater trochanter (superior border)

 

Nerve: ventral rami of S1 – S2

 

Action:

laterally rotates extended thigh

abducts flexed thigh

Term
[image]
Definition

Origin:

• Pelvic (posterior) surface of obturator

membrane and surrounding bones

 

Insertion:

• greater trochanter (medial surface)

 

Nerve: nerve to obterator internus (L5-S1)

 

Action:

lateral rotation of extended thigh

abduction of flexed thigh

 

Comments:

• Leaves the pelvis through the lesser sciatic foramen

• Is assisted by the gemelli muscles

Term
[image]
Definition

Origin:

• ischial spine

 

Insertion:

• greater trochanter (medial surface)

 

Nerve: nerve to obterator internus (L5-S1)

 

Action:

lateral rotation of extended thigh

abduction of flexed thigh

Term
[image]
Definition

Origin:

• Ischial tuberosity

 

Insertion:

• greater trochanter (medial surface)

 

Nerve:

nerve to quadratus femoris

 

Action:

laterally rotates extended thigh

abducts flexed thigh

Term
[image]
Definition

Origin:

• lateral border of ischial tuberosity

 

Insertion:

• intertrochanteric crest

 

Nerve:

nerve to quadratus femoris

 

Action:

laterally rotates thigh

Comments:

• Short, flat, rectangular-shaped muscle

Term
[image]
Definition

Origin:

• ASIS

• anterior part of iliac crest

On the ilac ala side

Insertion:

• Iliotibial tract (which attaches to the

lateral condyle of the tibia)

 

Nerve: superior gluteal nerve

 

Action:

abducts, flexes and medially rotates the hip

• helps stabilize the pelvis during standing

 

Comments:

• When the iliopsoas is paralyzed, TFL undergoes hypertrophy in an attempt to compensate

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