Deep Gluteal Muscles

Question 1

Piriformis

Answer 1

Proximal Attachment: Anterior Surface of Sacrum
Distal: Greater Trochanter

Posterior to hip joint (almost horiozontal)

Function:External Rotation

Innervation: Nerve to Piriformis (S1-S2)

Question 2

Obturator Externus

Answer 2

Proximal Attachment: External Surface of Obturator Membrane
Distal Attachment: Trochanteric Fossa of Femur

Posterior to hip joint and horizontal orientation

Function: External Rotation

Innervation: Obturator Nerve

Question 3

Obturator Internus

Answer 3

Proximal: Internal Surfacce of Obturator Membrane
Distal Attachment: Greater Trochanter (medial)

posterior to hip joint (horizontal)
Function: External rotation of the hip joint

Innervation: Nerve to Obturator Internus

Question 4

Quadratus Femoris

Answer 4

Proximal Attachment: Lateral Border of the Ischial tuberosity
Distal: Interochanteric Crest

Post (horiozontal)

Action: External rotation (stabilises the hip joint)

Innervation: Branches from the sacral plexus

Question 5

Superior Gemelli

Answer 5

Proximal Attachment: Ischial Spine

Distal Attachment: Greater trochanter (medial)

Position: post. Orientation: horizontal

Action: External rotation

Innervation: Branches from the Sacral Plexus

Question 6

Inferior Gemelii

Answer 6

Proximal Attachment: Ischial Tuberosity ( Upper Aspect)

Distal Attachment: Greater Trochanter (Medial)

Position: Post. Orientation: Horizontal

Action: External Rotation and Abduction

Innervation: Branches from sacral plexus