GI - Class 1 Flashcards

1
Q

What are the two imaginary lines used to divide the abdomen in 4 quadrants?

A

Transumbilical plane

Median plane

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2
Q

What are the imaginary lines used to divide the abdomen into 9 regions?

A

Two horizontal:
subcostal plane and trans tubercular plane
Two vertical:
right and left midclavicular planes

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3
Q

Name a few organs in the right hypochondriac

A

Liver, gallbladder, right kidney

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4
Q

Name a few organs in the epigastric

A

stomach, pancreas, duodenum

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5
Q

Name a few organs in the left hypochondriac

A

spleen, left kidney, pancreas

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6
Q

Name a few organs in the right lumbar

A

liver, ascending colon, gallbladder

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7
Q

Name a few organs in the umbilical

A

umbilicus, small intestine, duodenum

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8
Q

Name a few organs in the left lumbar

A

descending colon, left kidney

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9
Q

Name a few organs in the right iliac

A

appendix, caecum

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10
Q

Name a few organs in the hypogastric region

A

urinary bladder, sigmoid colon, female reproductive organs

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11
Q

Name a few organs in the left iliac

A

descending colon, sigmoid colon

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12
Q

What are the five bilaterally paired muscles in the anterolateral abdominal wall?

A

3 flat muscles: external oblique, internal oblique and transversus abdominis
2 vertical muscles: rectus abdominis and pyramidalis

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13
Q

What is the action and innervation of the external oblique muscle?

A

compresses and supports abdominal viscera, flex and rotate trunk.
innervate by thoraco-abdominal nerves (anterior rami of T7-T11)
subcostal nerve

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14
Q

What is the action and innervation of the internal oblique muscle?

A

compresses and supports abdominal viscera, flex and rotate trunk.
innervate by thoraco-abdominal nerves (anterior rami of T7-T11)
subcostal nerve
first lumbar nerve

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15
Q

What is the action and innervation of the transversus abdominis muscle?

A

compresses and supports abdominal viscera.
innervate by thoraco-abdominal nerves (anterior rami of T7-T11)
subcostal nerve
first lumbar nerve

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16
Q

What is the action and innervation of the rectus abdominis muscle?

A
flexes trunk (lumbar vertebrae) compresses abdominal viscera, stabilises and controls tilt of pelvis(antilordosis)
innervate by thoraco-abdominal nerves (anterior rami of T7-T11) 
subcostal nerve
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17
Q

What is the rectus sheath?

A

formed by the interlaced aponeurosis of the flat abdominal muscles enclosed in the rectus abdominis and the pyramidalis.

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18
Q

What is the arcuate line?

A

demarcates the transition between the posterior rectus sheath covering the superior three quarters of the rectus abdominis proximally and the transversalis fascia covering the inferior quarter.

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19
Q

What vertebral level is the umbilicus

A

L3-L4

20
Q

What dermatome supplies the level of the umbilicus

A

T10

21
Q

The inguinal ligament is attached to which two bony points of the hip bone

A

pubic tubercle and the anterior superior iliac spine

22
Q

4 distinct functional layers of the gastrointestinal tract?

A

mucosa, submucosa, musculares propria and the serosa/ adventitia

23
Q

What are the three layers of the mucosa?

A

epithelium, lamina propria and muscularis propria

24
Q

What are the four basic mucosal types found in the GI tract?

A
  1. Protective
  2. secretory
  3. absorptive
  4. absorptive/ protective
25
Q

Describe the protective mucous membrane

A

stratified squamous epithelium found in the oral cavity, pharynx, oesophagus and anal canal

26
Q

Describe the secretory mucous membrane

A

closely packed straight glands with goblet cells found only in the stomach

27
Q

Describe the absorptive mucous membrane

A

vili with short glands typical of the entire small intestine

28
Q

Describe the absorptive/ protective mucous membrane

A

simple columnar epithelium with tubular glands - lines the whole of the large intestine

29
Q

What is the innervation of the abdominal muscles?

A

Ventral rami of T7-L1

thoraco-abdominal nerves

30
Q

Formation of inguinal canal

A

An evagination of peritoneum
called processus vaginalis
develops along the path of
gubernaculum

31
Q

Define gubernaculum

A

A fibrous
cord or tissue
pulls the testis / ovary
down

32
Q

What is Cryptorchidism

A

Undescended testes

33
Q

What is the prevalence of cryptorchidism?

A

Occurs in 30% of premature males. Can be unilateral or bilateral

34
Q

What is the cause of cryptorchidism?

A

Deficiency of androgen production by the fetal testis

35
Q

What condition does cryptorchidism predispose.

A

Testicular cancer

36
Q

What are the contents of the inguinal canal?

A

spermatic cord in males and round ligament of the uterus in females. Also contains blood, lymphatic vessels and ilioinguinal nerve in both the sexes

37
Q

Anatomical location of the inguinal canal

A

Lies parallel and superior to the medial half of the inguinal ligament

38
Q

Features of the deep inguinal ring

A

Entrance to the inguinal canal. Part of transversalis fascia

Location – superior to the middle of inguinal ligament, lateral to inferior epigastric artery

39
Q

Features of the superficial inguinal ring

A

Exit of the canal. Present in the external oblique aponeurosis
Location – Above and lateral to pubic tubercle

40
Q

Anterior wall of inguinal canal

A

External oblique aponeurosis

41
Q

Posterior wall of the inguinal canal

A

Trasversalis fascia & medial part by conjoint tendon (internal oblique + transversus abdominis)

42
Q

Roof of the inguinal canal

A

Laterally by transversalis fascia and centrally by internal oblique and transversus `abdominis muscles

43
Q

Floor of the inguinal canal

A

inguinal ligament

44
Q

What is a hernia?

A

A hernia is an abnormal protrusion of a viscus (organ) or part of a viscus through an opening in the cavity in which it is normally contained. About 75% of all herniae occur at the groin.

45
Q

What are the different types of hernia

A
Inguinal hernia – direct and indirect
Femoral hernia
Umbilical hernia
Paraumbilical hernia
Epigastric hernia
Incisional hernia
Hiatus hernia
46
Q

Indirect inguinal hernia

A

Indirect inguinal hernia is common in young individuals – congenital weakness

47
Q

Direct inguinal hernia

A

Direct inguinal hernia is more common in old people – Lax muscles