Question

What is the origin of the muscle responsible for hip flexion?

1) Transverse processes of all lumbar vertebrae bodies and IVD of lumbar vertebrae
2) Lesser trochanter
3) Lumbar plexus via anterior branches of L1-L3 nerves
4) None of the above

Answer 1

The muscle responsible for hip flexion comes from the iliopsoas group, originating from the pelvic girdle and lumbar vertebrae, and inserting into the lesser trochanter of the femur. None of the provided options correctly describe the origin of this group, hence the correct answer is 'None of the above'.

Step-by-step explanation:

The origin of the muscle responsible for hip flexion is not mentioned explicitly in the provided options, but through the information given, we can deduce that the muscle referred to is part of the iliopsoas group, which consists of the iliacus and psoas major muscles. These muscles originate from the pelvic girdle and lumbar vertebrae and are primary hip flexors. Specifically, the psoas major originates from the transverse processes of lumbar vertebrae, sides of the vertebral bodies of T12 through L5, and the intervertebral discs between them. The iliacus originates from the iliac fossa on the interior side of the ilium and joins the psoas major to form the iliopsoas, inserting into the lesser trochanter of the femur. Therefore, the correct answer would be none of the above as none of the options correctly describe the full origin of the iliacus and psoas major muscles as components of the iliopsoas.