Exam 5 Flashcards
What are the superior and inferior borders of the pelvic region ?
Superior: pelvic inlet
Inferior: pelvic outlet/pelvic diaphragm
What does the pelvic brim divide?
Pelvic brim divides the superior greater pelvis from the inferior false pelvis.
The greater pelvis is bowl shaped to hold up abdominal organs
What are the four parts of pelvis?
Ilium, ischium, pubis, sacrum
How does the os coxae meet with the public symphysis and sacrum?
Ox coxae meets anteriorly at public symphysis
- articulates posteriorly with sacrum
What do the pelvis joints attach?
Iliolumbar, anterior/posterior sacroiliac, sacrospinous, sacrotuberus, and anterior/posterior sacrococcygeal
Iliolumbar ligament: superior/inferior attachment between ilia and lumbar spine transverse processes
Anterior/posterior sacroiliac: laterally attach ilium and sacrum
Sacrospinous: attaches sacrum to ischial spine
Sacrotuberus: attaches sacrum to ischial tuberosities
Anterior/posterior sacrococcygeal: ligaments attach sacrum to coccyx
What element does semen have to survive in the vagina?
Semen has alkaline elements to differ urethra acidity and vagina
What are the three zones of the penis urethra?
Prostatic urethra: extends through the prostate gland
Membranous urethra: external urethra sphincter
Spongy urethra: encased within erectile tissue
Transports urine and semen
What is the trigone of the bladder?
The rugae?
Triangle shaped space between ureter orifices-location of stretch receptors that trigger urge to urinate
Rugae allow it to expand as it fills.
Why does someone is pregnant use the restroom more?
They would have less room for bladder to expand, causing more pressure on receptors.
Feature of vaginal urethra
Just for urine, very short (3cm)
What are the fimbriae?
Finger like projections that hover outside of the ovary. Do not touch ovary
What are the three walls of uterus? What is shed during menstruation? Which one contracts during labor?
Endometrium (shed) , myometrium (contracts) perimetrium
What does the Iliohypogastric innervate?
L1 and T12 fibers
Innervates: internal oblique and transversus abdominus. Sensory innervation in pubic region
What does ilioinguinal nerve innervates?
L1 Fibers
Innervates: internal oblique and transversus abdominus. Sensory innervation in pubic region
What does the genitofemoral nerve innervate?
L1 and L2 nerve
Innervates: sensory to genitalia and upper anterior thigh
What does the Lateral Femoral Cutaneous Nerve innervate?
L2 and L3
Innervates: sensory only for skin of the anterio-lateral thigh
What does the femoral nerve innervate?
L2, L3, L4
Muscle innervation to hip flexors/knee extensors. Sensory innervation to anterior thigh and medial leg
What does the obturator nerve innervate?
L2,L3,L4
Innervates the adductor muscles and the skin over the medial thigh
What are the two major nerves from the sacral plexus?
And what verterbrae they come from
Sciatic (L4, L5, S1, S2, S3) and Pudendal (S2, 3, 4)
What muscles does the sciatic nerve innervate and what is it made of?
Largest nerve in the body (2cm wide)
L4-S3
Posterior thigh muscles, all leg and foot muscles, all joints of the lower limb
Sciatic nerve is made of two nerve joined in a connective tissue sheath: common peroneal and tibial
What does the Pudendal nerve innervate?
Main nerve of the perineum and genitalia
S2-S4
Exits pelvis posteriorly through greater sciatic foramen, then re-enters anteriorly through lesser sciatic foramen.
What are the actions of the Tensor facia latae and IT Band
Major hip abductor and has some flexion contribution
OIAN of Tensor Facia Latae
O: anterior iliac crest
I: lateral condyle of tibia via IT band
A: stabilizes knee, flexes hip, abducts hip, internally rotates hip
N: superior gluteal nerve
OIAN of Gluteus Minimus
O: inferior posterior ilium
I: anterior surface of greater trochanter of femur
A: Abducts hip, internally rotates hip
N: superior gluteal nerve
OIAN of Gluteus Medius
O: middle posterior ilium
I: greater trochanter of femur
A: abducts hip, internally rotates hip
N: superior gluteal nerve
Where are the hip stabilizers?
the muscles along the lateral and posterior sides of the hip joints. (gluteus medius, gluteus maximus, piriformis)
OIAN of gluteus maximus
O: posterior sacrum and sacrotuberous ligament, superior posterior ilium
I: gluteal tuberosity of femur, lateral condyle of tibia via IT band
A: extension of hip, external rotation of the hip
N: inferior gluteal nerve
OIAN of Superior Gemellus
Lateral rotators of the femur
O:Ischial spine
I: Medial surface of greater trochanter of femur (via tendon of obturator internus)
A: Hip joint: Thigh external rotation, thigh abduction (from flexed hip); stabilizes head of femur in acetabulum
N: Nerve to obturator internus (L5-S1)
Six deep lateral rotators of the femur
piriformis, superior gemellus, obturator internus, inferior gemellus, obturator externus, quadratus femoris
OIAN of Piriformis
Origin: - Anterior sacrum
Insertion: - Greater trochanter of femur
Action: - External rotation of hip
Nerve Supply: - Anterior rami S1-2
OIAN of Obturator Internus
Origin:
- Obturator membrane
- Superior pubic ramus
Insertion: - Greater trochanter of femur
Action: - External rotation of hip
Nerve Supply: - Sacral Plexus L5, S1, S2
OIAN of Inferior gemellus.
O: lateral surface of ischial tuberosity
I: medial surface of greater trochanter of femur
A: External rotation of thigh, thigh abduction
N: quadratus femoris nerve
OIAN of obturator externus
Origin:
- Obturator membrane
- Pubic and ischial rami
Insertion: - Greater trochanter of femur
Action: - External rotation of hip
Nerve Supply: - Obturator Nerve
OIAN of quadratus femoris
Origin: - Ischial tuberosity
Insertion: - Quadrate tubercle
Action: - External rotation of hip
Nerve Supply: - Nerve to quadratus femoris L4, L5, S1
What is the main extensor of the hip
Gluteus maximus
What increases the stability of the hip joint?
-shape of articulating surfaces
- acetabular labrum
-joint capsule
- 3 strong ligaments (iliofemoral, pubofemoral, ischiofemoral)
What are the three strong ligaments of hip joint
iliofemoral( prevents excessive extension), pubofemoral (prevents excessive abduction), ischiofemoral (provides stability during extension)
What are the prime hip flexors
Iliopsoas (Iliacus and psoas major together)
Sartorius
Prime Hip abductors
tensor fascia latae and IT band
Prime Hip adductors
pectineus, adductor longus/brevis/magnus, gracilis
Primary hip extensors
gluteus maximus