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Gross Anatomy (2) > Lecture 4 - Pelvic Nerves and Vessels > Flashcards

Lecture 4 - Pelvic Nerves and Vessels Flashcards

1
Q

What section of the spine to the roots of the main pelvic nerves come from?

A

L4-S5.

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2
Q

What is the main nerve of the pelvis?

A

Sciatic.

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3
Q

What is the main artery of the pelvis?

A

Pudendal.

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4
Q

What is the root of the sciatic nerve and where is it?

A

L4,5, S1-3 - In the posterior compartment of the thigh.

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5
Q

What does the sciatic nerve supply?

A

Its branches supply all muscles of the leg and foot.

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6
Q

What is the root of the superior gluteal nerve?

A

L4,5, and S1.

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7
Q

What does the gluteal nerve branch into?

A

Gluteal to gluteus minimus and medius.

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8
Q

What is the root of the inferior gluteal nerve?

A

L5, S1 and S2.

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9
Q

What is the root of the nerve supplying the obturator internus?

A

Direct L5-S1.

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10
Q

What is the root of the nerve supplying the piriformis?

A

Direct from S1-2.

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11
Q

What nerves supply the levator ani?

A

Direct and pudendal.

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12
Q

What nerve supplies the coccygeus?

A

Direct S4-5.

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13
Q

What is the root of the pudendal nerve?

A

S2-4.

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14
Q

What does the pudendal nerve innervate?

A

Levator ani, external anal and external urethral sohincters, bulbospongiosus and ischiocavernosus.

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15
Q

What type of fibres make up the pudendal nerve?

A

Motor and sensory.

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16
Q

What does the sympathetic division of the ANS control in the pelvis?

A

Rectum – decrease movement, contract internal anal and urethral sphincters, relax bladder detrusor, ejaculation – Contract ductus deferens and seminal vesicles, uterus – Relax/contract (hormonal) and vasoconstriction of arteries.

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17
Q

Where does parasympathetic control of the pelvis come from?

A

Pelvic spalchnic nerves, S2-4.

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18
Q

What does the parasympathetic division of the ANS control in the pelvis?

A

Increase motility rectum and anal canal, relax internal anal sphincter, bladder = Contracts detrusor and inhibits contraction of internal sphinchter, and vasodilation of arteries – Erection

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19
Q

What nerves supply the penis, what fibres are they made up of, and what are their origins?

A

Dorsal nerve of penis (pudendal nerve) - somatic sensory and sympathetic, and cavernous nerves (prostatic nerve plexus) - parasympathetic.

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20
Q

What type of fibres make up the pudendal nerve?

A

Somatic sensory and sympathetic.

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21
Q

In males, what nerve supplies the perineal muscles, what fibres is it made from and what is its origin?

A

Perineal branch (Pudendal nerve) - Somatic motor.

22
Q

What nerves supply the scrotum, what fibres are they made from and what are their origins?

A

Anterior (Ilioinguinal and genitofemoral) - somatic sensory, and posterior scrotal (Perineal branch of pudendal) - Somatic sensory.

23
Q

In females, what nerve supplies the anterior perineum, what fibres is it made of, and what is its origin?

A

Anterior labial (Somatic sensory)– ilioinguinal and genitofemoral origin.

24
Q

In females, what nerve supplies the posterior perineum, what fibres is it made of and what is its origin?

A

Perineal branch (Pudendal, posterior cutaneous of the thigh) - Somatic sernsory.

25
Q

What nerve supplies the labia, what fibres is it made from and what is its origin?

A

Posterior labial (Pudendal) - Somatic sensory.

26
Q

What nerve supplies the orifice of the vagina, what fibres is it made from and what is its origin?

A

Deep branch (Pudendal) - Somatic sensory.

27
Q

In females, what nerve supplies the perineal (superficial) muscles, what fibres is it made from and what is its origin?

A

Muscular branches (Pudendal) - Somatic motor.

28
Q

What nerve supplies the clitoris and deep perineal muscles, what fibres is it made from and what is its origin?

A

Dorsal nerve of clitoris (Pudendal) - Somatic motor and sensory.

29
Q

What nerve supplies the bulb of vestibule and clitoris, what fibres is it made from and what is its origin?

A

Cavernous nerves (Utero-vaginal plexus) - Parasympathetic.

30
Q

Where do the sensory fibres of the Ilioinguinal, genitofermoral and pudendal go?

A

To the anterior skin.

31
Q

Where else does the sensory fibres of the pudendal go?

A

Genitalia.

32
Q

What happens to the aorta at L4?

A

It divides into the 2 common iliac arteries.

33
Q

What does each common iliac artery divide into?

A

Internal and external iliac branches.

34
Q

What is the main blood supply of the pelvis?

A

Internal iliac arteries.

35
Q

What does each internal iliac artery divide into?

A

An anterior and posterior division.

36
Q

What are the branches of the anterior division of the internal iliac arteries?

A

Umbilical (gives rise to superior vesical), obturator, inferior gluteal, internal pudendal, middle rectal, inferior vesical

37
Q

In males, what does the inferior vesical and middle rectal supply?

A

Prostate, seminal vesicles and ducuts deferens.

38
Q

What do the testicular arteries branch from?

A

Abdominal aorta at L2.

39
Q

Where do the ovarian arteries branch from?

A

Abdominal aorta at L2.

40
Q

What are the branches of the posterior division of the internal iliac?

A

Iliolumbar, lateral sacral and superior gluteal.

41
Q

What does the obturator artery supply and what is its origin?

A

Pelvic muscles, head of femur, ilium - Internal iliac.

42
Q

What does the superior vesical artery supply and what is its origin?

A

Superior aspect bladder, ductus deferens - Umbilical.

43
Q

What does the ductus deferens artery supply and what is its origin?

A

Ductus deferens - Superior/inferior vesical.

44
Q

What does the inferior vesical artery supply and what is its origin?

A

Urinary bladder, ureter, seminal vesicle, prostate - Internal Iliac.

45
Q

What does the middle rectal artery supply and what is its origin?

A

Rectum, seminal vesicle, prostate - Internal Iliac.

46
Q

What does the internal pudendal artery supply and what is its origin?

A

Perineum and anal canal - Internal Iliac.

47
Q

What does the inferior gluteal artery supply and what is its origin?

A

Levator ani, coccygeus, piriformis and gluteal - Internal Iliac.

48
Q

What does the uterine artery supply and what is its origin?

A

Ureter, uterus, vagina - Internal Iliac.

49
Q

What does the vaginal artery supply and what is its origin?

A

Vagina, bladder - Uterine.

50
Q

What does the iliolumbar artery supply and what is its origin?

A

Cauda equina, iliacus, psoas, quadratus lumborum - Internal Iliac (Posterior).

51
Q

What does the lateral sacral artery supply and what is its origin?

A

Vertebral canal, piriformis - Internal Iliac (Posterior).

52
Q

What type of fibres make up the prostatic nerve plexus?

A

Parasympathetic.

Gross Anatomy (2) (7 decks)

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