2. Inguinal Canal Flashcards
What two nerves serve the posterior surface of the scrotum?
Posterior scrotal nerves - which come from the perineal branch of the pudendal nerve
Perineal branches of the posterior cutaneous nerve of the thigh
Which opening will gut contents pass through in a direct hernia?
The superficial inguinal ring (not the deep inguinal ring).
What are the boundaries of the inguinal triangle?
Inferior epigastric vessels
Rectus abdominis
Inguinal ligament
What two nerves serve the anterior portion of the scrotum?
Anterior scrotal nerves – which come from the illioinguinal nerve
Genital branch of the genitofemoral nerve
What innervates the dartos smooth muscle?
Sympathetic branch of the autonomic nervous system
To which lymph nodes does the lymph of the testis drain?
The lumbar nodes – a.k.a. caval/aortic
Where does the conjoint tendon insert?
The conjoint tendon inserts on the pectineal line.
What gives rise to the lacunar ligament?
Where does the lacunar ligament attach?
The lacunar ligament arises from fibers of the inguinal ligament.
The lacunar ligament attaches to the pubic tubercle.
What are the two sources of blood supply to the scrotum?
Anterior: anterior scrotal branches coming from the deep external pudendal artery
Posterior: posterior scrotal branches coming from the perineal artery (a branch of the pudendal)
What embryonic layer forms the testes and ovaries?
Intermediate mesoderm
To which lymph nodes does the lymph of the scrotum drain?
The superficial inguinal nodes
What layers of the testicle are given rise to by the internal oblique?
The cremasteric fascia and cremaster muscle
What abdominal layer gives rise to the internal spermatic fascia?
The transversalis fascia
What layers of the abdominal wall will cover gut contents in an indirect hernia?
Same as cover the spermatic cord (transversalis fascia, internal oblique aponeurosis, external oblique aponeurosis, dartos fascia)
From what other structures does the cremaster muscle originate?
Fibers from the internal oblique muscle.