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S&F IV: Exam One > Inguinal Region > Flashcards

Flashcards in Inguinal Region Deck (33):
0

Inguinal Ligament

Lower border of the E.O. aponeurosis; extends from the ASIS to the pubic tubercle

1

Lacunar Ligament

Medial extension of the inguinal ligament which attaches to the pectineal line; its sharp edge form the femoral ring

2

Pectineal Ligament

Thickening of the periosteum that is continuous w/ the lacunar ligament at the pectineal line of the pubis

3

Conjoint tendon

Fused aponeuroses of I.O. and transversus abdominis mucles

4

Hesselbach's Triangle

Weakness in the abdominal wall vulnerable to a direct inguinal hernia; found in the medial inguinal fossa

5

Deep Inguinal Ring

Found lateral to the inferior epigastric vessels in the lateral inguinal fossa; spermatic cord protrudes thru the transverasalis fascia

6

Superficial Inguinal Ring

Formed by the medial and lateral crus (attached to the pubic symphysis and tubercle) and the pubic crest; technically an evagination of the E.O. aponeurosis

7

Anterior Wall of the Inguinal Canal

E.O. aponeurosis and I.O. aponeurosis (lateral 1/3)

8

Posterior Wall of the Inguinal Canal

Transversalis fascia and conjoint tendon (medial 1/3)

9

Roof of Inguinal Canal

I.O. muscle and aponeurosis and transversus abdominis aponeurosis

Also arching muscle fibers

10

Floor of Inguinal Canal

Ingiuinal and lacunar (medial 1/3) ligament

11

Structures transmitted thru the inguinal canal

Male=Spermatic Cord

Female= Round ligament of the uterus

Both= llioinguinal nerve and gential branch of the genitofemoral nerve

*llioinguinal nerve pierces canal laterally at the transversus abdominis and exits thru the superficial ring

12

Processus vaginalis

Evagination of peritoneum into the ventral abdominal wall that is independent of testes descent; after obliteration, persists as the tunica vaginalis on the testes

13

Gubernaculum

Condense band of mesenchyme that connects the developing gonad to the labioscrotal swellings; becomes the fibrous cord connecting the testest to the scrotum or the round ligament of the uterus

14

Testes descent

Gonads develop at L1 and descend thru the inguinal canal picking up layers of fascia as they travel the the processus vaginalis via the gubernaculum

*Cavity of the tunica vaginalis originates from the peritoneum

15

Camper's Fascia in scrotum

Dartos muscle

16

Scarpa's Fascia in scrotum

Colle's Fascia
-membranous layer of superficial fascia

17

E.O. aponeurosis in scrotum

External Spermatic Fascia

18

I.O. muscle and aponeurosis in scrotum

Cremaster muscle and fascia

19

Transversus abdominis muscle in scrotum

NO CONTRIBUTION

20

Transversalis fascia in scrotum

Internal spermatic fascia

21

Extraperitoneal fat in scrotum

Loose CT

22

Parietal Peritoneum in scrotum

Tunica vaginalis (obliterated processus vaginalis)

23

Dartos muscle

Contracts in response to cold and reduces the surface area of the scrotum

*Stabilizes testis temperature

24

Tunica albuginea

Outer capsule surrounding the testis

25

Site of sperm production

Seminiferous tubules

26

Spermatic Cord Layers and Components

Layers: External spermatic fascia
Cremasteric fascia
Internal spermatic fascia

Components: Testicular artery
Ductus deferens and artery
Pampiniform plexus (converges as testicular vein)
Genital branch of genitofemoral nerve
Cremasteric artery
Autonomic nerve plexus

27

Indirect Inguinal Hernia

-Neck of hernia passes thru deep inguinal ring in lateral inguinal fossa

-Enters lateral to inferior epigastric vessels

-Cause is from incomplete obliteration of the processus vaginalis

-covering consists of peritoneum

*More common hernia

28

Direct Inguinal Hernia

-Neck of hernia passes directly thru inguinal fossa in Hesselbach's triangle

- Enters medial to inferior epigastric vessels

-Never extends to scrotum

-Caused by weak posterior wall of inguinal canal

29

Femoral Hernia

Occurs thru the femoral ring and lies inferolaterally to the pubic tubercle

*Dangerous to repair due to possible presence of corona mortis and constriction by tough ligaments

*Common in women

30

Cryptochordism

Incomplete testes descent such that one of both testes remain in the body cavity or inguinal canal

31

Cremasteric Reflex

Reflex contraction of the cremaster muscle due to stroking of the medial thigh

Ilioinguinal N.-sensory to inner thigh
Genital Branch of genitofemoral N.- Motor to cremaster

32

Peritoneal recess infection

Occurs more commonly in women due to communication of Fallopian tubes and peritoneal cavity