Lower Limb Anatomy Quiz

The lumbar plexus is formed by the ventral rami of which spinal nerves?

• L1 to L4

• L2 to L5

• L1 to L5

• L3 to L5

All branches of the lumbar plexus leave the psoas major muscle at its lateral side EXCEPT:

• Femoral nerve

• Obturator nerve

• Lateral femoral cutaneous nerve

• Iliohypogastric nerve

The obturator nerve originates from which divisions of the lumbar plexus?

• Dorsal divisions of L2-L4

• Ventral divisions of L2-L4

• Ventral divisions of L1-L3

• Both dorsal and ventral divisions of L2-L4

Which muscles does the anterior division of the obturator nerve supply motor innervation to?

• All adductor muscles including adductor magnus

• Only the adductor magnus

• All adductor muscles except adductor magnus

• Only gracilis and obturator externus

The sensory distribution of the obturator nerve is to which region?

• Anterior thigh

• Lateral thigh

• Medial thigh (lower part)

• Posterior thigh

Which primary functional trade-off characterizes the lower limbs compared to the upper limbs?

• Increased mobility for reduced stability

• Reduced mobility for increased stability

• Equal mobility and stability

• Increased rotational freedom for decreased weight-bearing ability

Which of the following is NOT a function of the lower limbs mentioned in the text?

• Supporting body weight during running

• Providing stability during standing

• Facilitating fine motor movements

• Assisting in walking

The gluteus maximus originates from all of the following EXCEPT:

• Gluteal surface of ilium behind posterior gluteal line

• Back of sacrum and coccyx

• Sacrotuberous ligament

• Middle gluteal line of ilium

Approximately what proportion of the gluteus maximus inserts into the iliotibial tract?

• ¼

• ½

• ¾

• Entire muscle

The psoas major muscle originates from:

• Iliac fossa

• Transverse processes and bodies of all lumbar vertebrae

• Lumbar vertebrae only

• Sacrum and lumbar vertebrae