defecation Flashcards

1
Q

pelvic floor muscles involved in continence

A

levator ani trio

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2
Q

what are the main muscles of levator ani in men/woemn

A

pubourethralis/puborectalis
pubovaginalis/puborectalis

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3
Q

what si this muscle? where does it attach

A

puborectalis - U shaped muscle aattached to pubic symphysis, loops round rectuam, vagina and urethra

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4
Q

nerve roots aand what does it do: pudendal nerve

A

S2,3,4 keeps 3 P’s off the floor (penis poo and pee)

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5
Q

which nerve is a branch of teh pudendal nerve and innervates bulbospongiosus, ischiocavernosis and levator ani muscles

A

perineal

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6
Q

The levator ani muscles also receive innervation directly from the anterior ramus of the

A

S4 root

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7
Q

which nerve provides motor supply to theexternal anal sphincter and what is it a branch of

A

inferior rectal nerve - branch of pudendal

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8
Q

internal anal sphincter is autonomic so what is its innervation

A

L5 symp - hypogastrix plexus and S2-4 para - pelvic plexus

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9
Q

***what is not present in Hirschprung’s disease

A

RAIR

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10
Q

what does the anorectal angle do

A

creates the “flap valve” so that when intra-abdominal pressure increases, the valve closes so poo doesn’t get pushed into the rectum

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11
Q

what are the lateral angulations in the sigmoid colon called

A

valves of Houston

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12
Q

what is the ability of teh rectum to maintain poo called

A

reservoir continence

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13
Q

what is RAIR

A

rectoanal inhibitory reflex

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14
Q

what does RAIR do

A

allows anal mucosal sampling to distinguish between gas/solid/liquid contents of rectum

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15
Q

how often does RAIR occur

A

7/h

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16
Q

what is this

A

rectocele

17
Q

which muscle passive incontinence

A

IAS

18
Q

EAS failure is responsible what sort of incontinence

A

urge

19
Q
A

A - IAS
B-EAS

20
Q

what do you do if you see a faecaloma on an x-ray?

A

call the surgeons!