LUMBAR PLEXUS

The spermatic cord contains:

1. Vas deferens
2. Testicular artery and veins
3. Cremastric artery (a branch of the inferior epigastric artery)
4. Artery to the vas deferens (from the superior vesical artery)
5. Genital branch of the genitofemoral nerve
6. Cremastric nerve and sympathetic components of the testicular plexus, which are joined by filaments from the pelvic plexus accompanying the artery to the vas deferens
7. 4-8 lymph vessels draining the testis.

(All of these structures are conjoined by loose connective tissue)

The muscles in the medial compartment of the thigh are primarily adductors of the hip because of their medial orientation. The obturator nerve (L2–L4) innervates most of the muscles in the medial compartment of the thigh.

• Tibial nerve serves as afferent and efferent nerve  involved in plantar reflex
• Pudendal nerve serves as afferent and efferent nerve  involved in anal reflex.

Urinary bladder has both afferent and efferent fibers from both sympathetic and parasympathetic divisions of the nervous system.

• Afferent sympathetic fibers enter through L1 and L2 and lower thoracic segments. Afferent parasympathetics enter through 2nd and 3rd sacral segments. 
• Efferent parasympathetics arise from L1-4 pass through lateral sympathetic chain then through semilunar and inferior mesenteric ganglia and finally through presacral nerve to hypogastric ganglia through two hypogastric nerves. 
• Efferent parasympathetic arise from 2nd, 3rd and 4th sacral segment fibers pass through pelvic visceral nerves and end in hypogastric ganglia. 

A i.e. Femoral branch of genitofemoral nerve; B i.e. Femoral vein ; C i.e. Psoas major

B. i.e. Genital branch of genitofemoral nerve 

Cremastric & Dartos muscle is supplied by genital branch of genitofemoral nerveQ

Innervation of adductor magnus

• Posterior division of obturator nerve innervates most of the adductor magnus
• Vertical or hamstring portion innervated by tibial nerve (L2, L3, L4)

Branches of femoral nerve

• Anterior division: In the thigh the anterior division of the femoral nerve gives off anterior cutaneous and muscular branches.
• Anterior cutaneous branches: The anterior cutaneous branches comprise the following nerves:
• Intermediate femoral cutaneous nerve and
• Medial femoral cutaneous nerve

Muscular branches (rami musculares):

• The nerve to the Pectineus arises immediately below the inguinal ligament.
• The nerve to the Sartorius arises in common with the intermediate cutaneous.
• Posterior division: The posterior division- muscular branches supply the four parts of the Quadriceps femoris.
• The branch to the Rectus femoris enters the upper part of the deep surface of the muscle, and supplies a filament to the hip-joint.
• The branch to the Vastus lateralis, of large size, accompanies the descending branch of the lateral femoral circumflex artery.
• The branch to the Vastus medialis descends lateral to the femoral vessels in company with the saphenous nerve.
• The branches to the Vastus intermedius.
• The articular branch to the hip-joint is derived from the nerve to the Rectus femoris.
• The articular branches to the knee-joint are three in number.
• One, a long slender filament, is derived from the nerve to the Vastus lateralis.
• Another, derived from the nerve to the Vastus medialis
• The third branch is derived from the nerve to the Vastus intermedius.

Innervation of adductor magnus

• Posterior division of obturator nerve innervates most of the adductor magnus
• Vertical or hamstring portion innervated by tibial nerve (L2, L3, L4)

Ans. is ‘b’ i.e., Efferent : genital branch of genitofemoral nerve

Contents of inguinal canal

• Spermatic cord in male or round ligament of uterus in female.
• Ilioinguinal nerve : It enters through the interval between external and internal oblique muscles.

Note: Genital branch of genitofemoral nerve is a component of spermatic cord (not femoral branch of genitofemoral nerve).

Branches of femoral nerve are :‑

1. From the main trunk :- Nerve supply to iliacus, nerve supply to pectineus and a few vascular branches.
2. From anterior division :- Intermediate femoral cutaneous nerve (intermediate cutaneous nerve of thigh), medial femoral cutaneous nerve (medial cutaneous nerve of thigh) and muscular branch to sartorius.
3. From posteior division :- Saphenous nerve, nerve supply to quadriceps femoris (rectus femoris, vastus medialis, vastus lateralis, vastus intermedius).
4. Articular supply :- Hip joint is supplied by nerve to rectus femoris; knee joint is supplied by nerve to three vasti.

The spermatic cord in males and round ligament of uterus in females, enter the inguinal canal through the deep inguinal ring and pass out through superficial inguinal ring.

Thus consituents of spermatic cord are also components of inguinal canal; these are ductus deferens (vas deferens), testicular artery, cremestric artery, artery to ductus deference, pampiniform plexus, lymphatics, sympathetic plexus, genital branch of genitofemoral nerve, remains of process vaginalis.

Note: Ili oiguinal nerve enters inguinal canal through interval between external and internal oblique muscles (not through deep inguinal ring).

Ans. is ‘d’ i.e., Subcostal nerve

Ans. (B) Sartorius

Branches of femoral nerve are :‑

• From the main trunk :- Nerve supply to iliacus, nerve supply to pectineus and a few vascular branches.
• From anterior division :- Intermediate femoral cutaneous nerve (intermediate cutaneous nerve of thigh), medial femoral cutaneous nerve (medial cutaneous nerve of thigh) and muscular branch to sartorius.
• From posterior division :- Saphenous nerve, nerve supply to quadriceps femoris (rectus femoris, vastus medialis, vastus lateralis, vastus intermedius).
• Articular supply :- Hip joint is supplied by nerve to rectus femoris; knee joint is supplied by nerve to three vasti.