Pelvis Muscles
All muscles of Pelvis Region with their Origin, Insertion, Nerve Supply and Action
Gluteal Muscles:-
(A) Gluteus maximus:-
Origin – Lateroposterior surface of sacrum and coccyx and behind the posterior gluteal line.
Insertion – Gluteal tuberosity of femur bone and iliotibial tract.
Nerve Supply – Inferior gluteal Nerve (L5-S2).
Action – Hip Extension, Abduction, Adduction and External rotation.
(B) Gluteal medius:-
Origin – Gluteal surface of the ilium.
Insertion – Lateral aspect of greater trochanter of the femur bone.
Nerve Supply – Superior gluteal Nerve (L4-S1).
Action – Hip Abduction, Internal rotation and Pelvis stabilization.
(C) Gluteus minimus:-
Origin – Gluteal surface of the ilium.
Insertion – Anterior aspect of the greater trochanter of the femur bone.
Nerve Supply – Superior gluteal Nerve (L4-S1).
Action – Hip Abduction, Internal rotation and Pelvis stabilization.
(D) Tensor fasciae latae:-
Origin – Anterior superior iliac spine (ASIS).
Insertion – Iliotibial tract.
Nerve Supply – Superior gluteal Nerve (L4-S1).
Action – Hip Internal rotation, Leg External rotation and Stabilises Hip & Knee Joints.
Inner Hip Muscles:-
(A) Iliacus:-
Origin – Iliac fossa.
Insertion – Lesser trochanter of femur bone.
Nerve Supply – Femoral Nerve (L2-L4).
Action – Hip/Trunk Flexion and Hip External rotation.
(B) Psoas major:-
Origin – Vertebral bodies of T12-L4 and Costal processes of L1-L5 vertebrae.
Insertion – Lesser trochanter of femur bone.
Nerve Supply – Anterior rami of Spinal Nerves (L1-L3).
Action – Hip/Trunk Flexion, Hip External rotation and Trunk lateral flexion.
(C) Psoas minor:-
Origin – Vertebral bodies of T12 and L1 vertebrae.
Insertion – Iliopubic eminence and Pectineal line of pubis.
Nerve Supply – Anterior rami of Spinal Nerves (L1-L3).
Action – Hip/Trunk Flexion, Hip External rotation and Trunk lateral flexion.
(D) Obturator externus:-
Origin – Anterior superior of Obturator membrane.
Insertion – Trochanteric fossa of femur bone.
Nerve Supply – Obturator Nerve (L3-L4).
Action – Hip external rotation, Abduction and Stabilises head of femur in acetabulum.
(E) Piriformis:-
Origin – Anterior surface of the sacrum and Gluteal surface of the ilium.
Insertion – Apex of greater trochanter of the femur bone.
Nerve Supply – Nerve to piriformis (S1-S2).
Action – Hip external rotation, Abduction and Stabilises head of the femur in acetabulum.
(F) Quadratus femoris:-
Origin – Ischial tuberosity.
Insertion – Intertrochanteric crest of femur.
Nerve Supply – Nerve to quadratus femoris (L4-S1).
Action – Hip external rotation and Stabilises head of the femur in acetabulum.
Triceps coxae
(G) Obturator internus:-
Origin – Ischiopubic ramus, Posterior surface of obturator membrane.
Insertion – Medial surface of the Greater trochanter of the femur bone.
Nerve Supply – Nerve to obturator internus (L5,LS1).
Action – Hip external rotation, Abduction and Stabilises head of the femur in acetabulum.
(H) Superior gemellus:-
Origin – Ischial spine.
Insertion – Medial surface of the Greater trochanter of the femur bone.
Nerve Supply – Nerve to obturator internus (L5,LS1).
Action – Hip external rotation, Abduction and Stabilises head of the femur in acetabulum.
(I) Inferior gemellus:-
Origin – Ischial tuberosity.
Insertion – Medial surface of the Greater trochanter of the femur bone.
Nerve Supply – Nerve to quadratus femoris (L4-S1).
Action – Hip external rotation, Abduction and Stabilises head of the femur in acetabulum.