Question

What is the innervation for the anterior compartment of the thigh (be specific regarding vertebral bodies)? What muscle is the exception? What is the saying to help you remember? What is the primary action(s) of muscles from this compartment?

a) Innervated by nerves from vertebral bodies L2-L4, except for the sartorius. "L2, L3, L4 keeps the thigh off the floor." Primary actions include hip flexion and knee extension.
b) Innervated by nerves from vertebral bodies L4-L6, except for the quadriceps. "L4, L5, L6 keeps the thigh in the mix." Primary actions include hip extension and knee flexion.
c) Innervated by nerves from vertebral bodies L1-L3, except for the tensor fasciae latae. "L1, L2, L3 keeps the thigh free." Primary actions include hip abduction and knee extension.
d) Innervated by nerves from vertebral bodies L3-L5, except for the psoas major. "L3, L4, L5 keeps the thigh alive." Primary actions include hip adduction and knee flexion.

Answer 1

The innervation for the anterior compartment of the thigh comes from nerves from vertebral bodies L2-L4 except for the sartorius. The primary actions of muscles from this compartment are hip flexion and knee extension.

Step-by-step explanation:

The innervation for the anterior compartment of the thigh comes from nerves from vertebral bodies L2-L4, except for the sartorius. This is remembered with the saying 'L2, L3, L4 keeps the thigh off the floor.' The primary actions of muscles from this compartment include hip flexion and knee extension.