Thigh/Gluteal Region - Rob Flashcards
What three bones make up the pelvis?
Ischium, ilium, pubis
What type of joint is the hip joint?
Synovial, ball-and-socket
What is the function of the acetabular labrum?
To deepen the area of articulation in the acetabulum, thereby stabilising the joint
What factors stabilise the hip joint?
Acetabular labrum
Intracapsular ligaments
Extracapsular ligaments
Muscule attachments
What are the three extra capsular hip ligaments?
Iliofemoral
Pubofemoral
Ischiofemoral
One to each bone of the pelvis
What makes up the vascular supply to the hip joint?
Artery to head of femur
Medial and lateral circumflex arteries
In what direction is the hip more likely to dislocate? And why?
Posteriorly, due to the weaker posterior support (only the ischiofemoral ligament)
What signs indicate a posterior dislocation may have occurred?
The affected limb is shortened and internally rotated
Why is an intracapsular NoF fracture more severe?
Increased risk of AVN due to interrupted blood supply
How may the gluteal muscles be divided?
Deep group vs. superficial group
What are the deep muscles of the gluteal region?
Piriformis
Obturator internus
Gemellus superior and inferior
Quadratus femoris
What are the superficial muscles of the gluteal region?
Gluteus minimus, medius and maximus
What nerve innervates the obturator internus and gemellus superior?
Nerve to obturator internus
What nerve innervates the gemellus inferior and quadratus femoris?
Nerve to quadratus femoris
What innervates piriformis?
Branches from L5, S1 and S2 (nerve to piriformis in sheffield)
What are the functions of the 4 deep muscles apart from quadratus femoris?
Abduction of flexed femur
Lateral rotation
What is the function of quadratus femoris?
Lateral rotation only
What innervates gluteus medius minimus?
Superior gluteal nerve
What innervates gluteus maximus
Inferior gluteal nerve