Spom Exam 3 - Blood Supply And Innervation Of Pelvis - Powerpoint Slides

Front 1

-Consists of L4 - S4
-Formed by:
-Lumbosacral trunk

Back 1

Sacral Plexus

Front 2

Consists of L4, L5, S1, S2, S3

Back 2

Lumbosacral trunk

Front 3

Branches of Sacral plexus:

innervation of leg and thigh muscles

Back 3

Sciatic nerve

Front 4

Branches of Sacral plexus:

innervates gluteus medius and minimus

Back 4

Superior gluteal nerve

Front 5

Branches of Sacral plexus:

innervates gluteus maximus

Back 5

Inferior gluteal nerve

Front 6

Branches of Sacral plexus:

gives rise to inferior rectal branches and nerve to the dorsum of the penis and clitoris

Back 6

Pudendal nerve

Front 7

Branches of Sacral plexus:

innervates the piriformis

Back 7

Nerve to the piriformis

Front 8

Branches of Sacral plexus:

innervates the superior gemellus

Back 8

Nerve to the obturator internus

Front 9

Branches of Sacral plexus:

innervates the inferior gemellus

Back 9

Nerve to the quadratus femoris

Front 10

Branches of Sacral plexus:

cutaneous innervation of the posterior aspect of the thigh and gluteal region

Back 10

Posterior femoral cutaneous

Front 11

Branches of Sacral plexus:

Nerve to the levator ani, coccygeus, and external anal sphincter

Back 11

innervates each corresponding muscle named

Front 12

Formed by:

-S4, S5
-Coccygeal nerve (C0)

Back 12

Coccygeal Plexus

Front 13

In the pelvis, the sympathetic chain passes _________ to the sacrum

Back 13

anteriorly

Front 14

-Located at the site of bifurcation of the IVC and abdominal aorta (L5 level)

Back 14

Superior hypogastric plexus

Front 15

S2, S3, S4 join the sympathetic chain at ?

Back 15

Inferior hypogatric plexus

Front 16

These travel along either side of the rectum

Back 16

Hypogastric nerves

Front 17

Contraction of internal urethral and anal sphincters; contraction of smooth muscle in reproductive glands; ejaculation

All these are performed by what type of nervous innervation?

Back 17

Sympathetic innervation

Front 18

Where are the preganglionic parasympathetic neurons located in the pelvis (spinal levels)?

Back 18

S2, S3, S4

Front 19

Where are the postganglionic parasympathetic neurons located?

Back 19

Target tissues

Front 20

Parasympathetic neurons enter through what plexus in the pelvis?

Back 20

Inferior hypogastric plexus

Front 21

What kind of innervation performs the following?

-Vasodilation
-Bladder Contraction
-Erection

Back 21

Parasympathetic innervation

Front 22

What kind of innervation performs the following?

-are generally vasodilatory;
-stimulate bladder contraction;
-stimulate erection; and
-modulate activity of the enteric nervous system of the colon distal to the left colic flexure

Back 22

Parasympathetic

Front 23

What kind of innervation performs the following?

-cause contraction of smooth muscle in the internal urethral sphincter in men and the internal anal sphincters in both men and women;
-cause smooth muscle contraction associated with the reproductive tract and with the accessory glands of the reproductive system; and
-are important in moving secretions from the epididymis and associated glands into the urethra to form semen during ejaculation.

Back 23

Sympathetic

Front 24

Where does the Aorta bifurcate into the right and left common iliac arteries in the pelvis (spinal levels)?

Back 24

L4-L5

Front 25

External iliac artery becomes what artery in the thigh?

Back 25

Femoral artery

Front 26

Internal Iliac – Branches:
Posterior:

ascends along the lumbar vertebrae

Back 26

Iliolumbar artery

Front 27

Internal Iliac – Branches:
Posterior:

run towards the sacrum

Back 27

Lateral sacral artery

Front 28

Internal Iliac – Branches:
Posterior:

exits the pelvis between the lumbosacral trunk and S1 nerve

Back 28

Superior gluteal artery

Front 29

Internal Iliac – Branches:
Anterior:

-runs towards body wall, becomes ligamentous, and reflects off the body wall as the medial umbilical fold
-Gives rise to superior vesicular arteries

Back 29

Umbilical artery

Front 30

Internal Iliac – Branches:
Anterior:

Runs below the ureter

Back 30

Inferior vesicular artery in males
Vaginal artery in females

Front 31

Internal Iliac – Branches:
Anterior:

Runs above the ureter

Back 31

Uterine artery in females

Front 32

Internal Iliac – Branches:
Anterior:

Runs with the obturator nerve out of the obturator canal

Back 32

Obturator artery

Front 33

Internal Iliac – Branches:
Anterior:

-Runs with inferior gluteal artery and exits the pelvis at S2-S3
-Re-enters the pelvis in the lesser sciatic foramen and runs through the pudendal canal in the ischioanal fossa
-Gives off inferior rectal branch here

Back 33

Internal pudendal artery

Front 34

Internal Iliac – Branches:
Anterior:

-Runs with internal pudendal artery and exits the pelvis at S2-S3, may be difficult to distinguish
-Larger artery when compared with internal pudendal artery
-Goes to the gluteus maximus

Back 34

Inferior gluteal artery

Front 35

Internal Iliac – Branches:
Anterior:

Only in females—no correlate in males

Back 35

Uterine artery