Exam 3: Groin Flashcards
Inguinal ligament formed by
Lower edge of external oblique aponeurosis
Inguinal ligament extends from
ASIS to pubic tubercle
Lacunar ligament
Most medial fibers, insert into superior pubic ramus
Pectineal ligament
Lateral extension of lacunar lig, along pecten pubis
Inguinal canal is an ______ that is ____ long
Oblique passage; 3-5cm
Inguinal canal begins at _____ and ends at _____
Deep inguinal ring; superficial inguinal ring
Deep inguinal ring lies
Lateral and internal
Superficial inguinal ring lies
Medial and external
Inguinal canal is much larger in
Males (bc of spermatic cord)
Inguinal canal transmits
Spermatic cord (M) Round lig of uterus (F) Ilioinguinal nerve (both)
Conjoint tendon AKA
Inguinal falx
Conjoint tendon formed by
Fusion of aponeuroses of internal oblique and transversus abdominis
Conjoint tendon function
Strengthens posterior wall of medial half of inguinal canal
Anterior wall of inguinal canal
Aponeurosis of EO muscle
Posterior wall of inguinal canal
Conjoint tendon and transversalis fascia
Roof of inguinal canal
IO and transversus abdominis
Floor of inguinal canal
Inguinal and lagunar lig
Superficial inguinal ring location
Immediately lateral to pubic tubercle
Superficial inguinal ring formed by
Splitting of EO aponeurosis
Crura of Superficial inguinal ring
Lateral
Medial
Intercrural fibers
Lateral crus inserts into
Pubic tubercle
Some reflect to become lacunar lig
Medial crus inserts into
Pubic crest
Intercrural fibers
Strengthen apex of superficial inguinal ring
Deep inguinal ring is an opening within
Transversalis fascia
Deep inguinal ring location
Above inguinal lig, midway between ASIS and pubic symphysis
Deep inguinal ring lies just lateral to
Inferior epigastric vessels
Inguinal triangle
Area of potential weakness in anterior abdominal wall
Medial border of inguinal triangle
Lateral edge of rectus abdominis
Lateral border ot inguinal triangle
Inferior epigastric vessels
Inferior border of inguinal triangle
Inguinal lig
______ occur at inguinal triangle
Direct inguinal hernias
Inguinal canal before birth is ______
Shorter, and much less oblique
During childhood development inguinal canal _____
Lengthens and assumes its oblique position
2 anatomical adaptations to strengthen inguinal canal
Oblique position
Conjoint tendon
Oblique inguinal allow canal to be
Compressed by muscles of anterior ab wall
The same muscles which ________ also ______
Increase intra-abdominal pressure; narrow inguinal canal
Conjoint tendon adaptation function
Reinforces posterior wall of inguinal canal
Hernia
Abnormal protrusion of tissue through an opening
Inguinal hernias
Abdominal viscera (usually SI) protrude through inguinal region
Inguinal hernias are more common in _____ and why?
Males; large diameter of inguinal canal (spermatic cord) and scrotum creates a large potential space
Labia majora of female are homologous to
Scrotum of male
Labia majora are filled with
Fat
Indirect inguinal hernia passes through
Deep inguinal ring, inguinal canal, and superficial inguinal ring
Indirect inguinal hernia passes
Lateral to inferior epigastric vessels
Indirect inguinal hernia may be
Congenital or acquired
Indirect inguinal hernia accounts for _____ of inguinal hernias
75%
Processus vaginalis
Embryological outpouching of peritoneum which forms inguinal canal and tunica vaginalis of scrotum
When processus vaginalis does not obliterate it
Leaves passageway for intestines to pass into scrotum
Direct inguinal hernia punches
Directly through posterior wall of inguinal canal
Direct inguinal hernia passes
Medial to inferior epigastric vessels
Direct inguinal hernia causes
Bulging of anterior abdominal wall
Direct inguinal hernia is always
Acquired
Direct inguinal hernia accounts for ___ of inguinal hernias, occurring mostly in
25%; men over 40 years old
Femoral hernia passes through
Femoral canal
Femoral hernia occurs
Inferior to inguinal lig
Femoral hernia more common in
Females
Umbilical hernia results from
Incomplete closure of anterior abdominal wall after ligation of umbilicus at birth
Also defects in linea alba
Spermatic cord begins and ends at
Begins at deep inguinal ring
Ends at testis
Spermatic cord is covered by 3 layers of fascia:
- External spermatic fascia
- Cremasteric fascia
- Internal spermatic fascia
External spermatic fascia is derived from
External oblique aponeurosis
Cremasteric fascia is derived from
Internal oblique aponeurosis
Cremasteric fascia contains
Cremaster muscle
Cremaster muscle is derived from
Internal oblique muscle
Cremaster muscle innervation
Genital branch of genitofemoral nerve (L1,L2)
Function of cremaster muscle
Retracts testis; temperature regulation of sperm
Internal spermatic fascia derived from
Transversalis fascia
Ductus deferens
Muscular duct that transports sperm
Testicular artery is a branch of
Abdominal aorta
What makes up the bulk of spermatic cord
Pampiniform plexus
Paminiform plexus is an extensive network of
Veins
Pampiniform plexus acts as
Heat block
Left testicular veins drains into
Left renal vein
Right testicular vein drains into
Inferior vena cava
Artery to ductus deferens is a branch of
Superior vesical artery
Cremasteric artery is a branch of
Inferior epigastric artery
Genital branch of genitofemoral nerve supplies
Cremaster muscle
Varicocele
Varicose veins of pampiniform plexus
Ilioinguinal nerve accompanies
Spermatic cord
BUT IS NOT PART OF IT
2 branches of ilioinguinal nerve
Femoral branch
Anterior scrotal/labial nerve
Scrotum is an outpouching of
Anterior abdominal wall
Scrotum skin is ____ with ______
Thin; little or no fat
Important for maintaining temp below body temp
Scrotum contains
Testes
Epididymis
Lower part of spermatic cord
Dartos muscle
Smooth muscle
Dartos muscle function
Temperature regulation
Layers of Tunica vaginalis
Parietal layer
Visceral layer
Hydrocele
Accumulation of fluid in cavity of tunica vaginalis
Parietal layer of tunica vaginalis
Superficial, internal to internal spermatic fascia
Visceral layer of tunica vaginalis
Deep, adherent to testis and epididymis
Testes means
Witnessing
2 functions of testis
Production of spermatozoa
Secretion of androgens
Tunica albuginea
Outer covering of testis
Deep to visceral layer of tunica vaginalis
Testis is divided by septa into
Wedge shaped lobules
Mediastinum testis
Posterior part of testis where septa converge
Seminiferour tubules
Sperm producing portion
Each lobule contains ____ seminiferous tubules
2-3
Seminiferous tubules unite to form
Straight tubules
Rete testis
Network of canals where straight tubules empty
Efferent ductules
Connect rete testis to head of epididymis
Name in order how sperm travel to epididymis
Seminiferous — straight — rete testis — efferent ductules — head of epididymis
Epididymis function
Store sperm until they mature
3 parts of epididymis
Head
Body
Tail
Head of epididymis location
Connected to Superior surface by efferent ductules
Body of epididymis
Posterior surface of testis
Tail of epididymis
Ends in ductus deferens
Lymphatic drainage of testis
Lumbar nodes
Lymphatic drainage of scrotum
Superficial inguinal nodes
Testes develop in
Lumbar region
Testes normally descend through
Inguinal canal; just before birth
Gubernaculum testis
Ligament that connects testis to scrotum in the fetus
Gubernaculum testis during descent
Contracts to pull testis downward and through inguinal canal
Gubernaculum testis responds to
Testosterone