Muscles of Gluteal Region

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Presentation transcript:

Muscles of Gluteal Region

Lecture Objectives List the muscles of the gluteal region. Describe the attachments of the gluteal region muscles and their nerve supply. Describe the greater and lesser sciatic foramina and their contents.

Sciatic Foramina Greater sciatic foramen Lesser sciatic foramen Associated notches Greater sciatic notch Lesser sciatic notch Associated ligaments Sacrotuberous ligament Sacrospinous ligament greater sciatic foramen lesser sciatic foramen

Sciatic Foramina: Connections Greater sciatic foramen Pelvis & gluteal region Lesser sciatic foramen Perineum & gluteal region

Sciatic Foramina: Contents Greater sciatic foramen Piriformis m. Branches of sacral plexus BVs Lesser sciatic foramen Obturator internus m. Nerves and BVs to perineum

Greater Sciatic Foramen

Lesser Sciatic Foramen

Muscles of Gluteal Region Superficial layer Extensors, abductors Deep layer Lateral rotators

Muscles of Gluteal Region Extensor Gluteus Maximus

Muscles of Gluteal Region Abductors Gluteus Medius m. Gluteus minimus m. Tensor fasciae latae

Muscles of Gluteal Region: Lateral View

Muscles of Gluteal Region Superficial layer Relations Neurovascular bundle

Muscles of Gluteal Region Deep layer Lateral rotators Piriformis m. Greater sciatic foramen Obturator internus m. Lesser sciatic foramen

Muscles of Gluteal Region Deep layer Lateral rotators Superior gemellus m. Inferior gemellus m. Quadratus femoris m.

Hip Rotators

Surface Anatomy of Buttock Highest points of iliac crests L4‐L5 (for lumbar puncture) Intergluteal cleft Sacrum & coccyx Gluteal fold Gluteus maximus Inferior edge – line between coccyx and ischial tuberosity Superior edge – line between PSIS and greater trochanter Gluteus medius

Surface Anatomy of Buttock Nelaton line Between ASIS and ischial tuberosity Pass by greater trochanter Greater trochanter above the line in: Hip dislocation Femur neck fracture

Intragluteal Injection Vital structures Safe area Quadrants Line between PSIS & greater trochanter

Surface Anatomy Sciatic Nerve Location of sciatic nerve Line between greater trochanter and ischial tuberosity Down middle of posterior thigh