Lecture 1: Buttocks And Thigh Flashcards
4 gateways of neurovascular bundles in lower extremities
- Inguinal notch
- Greater sciatic
- Lower sciatic
- Obturator foramen
Superior and inferior boundaries of buttocks
Iliac crest (sup) Fold of buttocks (inf)
Cutaneous innervation of upper medial quadrant of buttocks
Posterior rami of the upper 3 LUMBAR NERVES and upper 3 SACRAL NERVES
Cutaneous innervation of upper lateral quadrant of buttocks
Lateral branches of iliohypogastric
Anterior rami of 12th thoracic nerves
Cutaneous innervation of lower lateral quadrant of buttocks
Lateral cutaneous nerve of the thigh (L2 and L3, anterior rami)
Cutaneous innervation of the lower medial quadrant
Posterior cutaneous nerve of the thigh (S1, S2, S3, anterior rami)
Cutaneous innervation of the skin over the coccyx
Lower sacral and coccygeal nerves
It is a group of lymph nodes where lymph vessels from buttocks drain
Lateral group of superficial inguinal nodes
2 fasciae found in buttocks
Superficial fascia
Deep fascia
The deep fascia of the thigh
Fascia lata
Thickened fascia along the lateral aspect of the thigh
Iliotibial tract
The muscle continuous with the superior border of the iliotibial tract
tensor fascia lata
The highest portion of the lower extremity
Iliac crest
3 bones of the hip bone
Ilium
Ischium
Pubis
- Point where the 3 bones of the hip bone meet
- Fossa where head of femur insert
Acetabulum
The inferior margin of the acetabulum
Acetabular notch
The floor of the acetabulum
Acetabular fossa
The joint formed by sacrum and articular surface of iliac
Sacroiliac joint
Articulation of pubis of the hip inferiorly
Symphysis pubis
6 important landmarks in the iliac ASIS
AIIS PSIS PIIS Iliac tubercle Iliac crest
Largest muscle in the body
Gluteus maximus
Locations of the 3 bursa associated with the gluteus maximus
- Between tendon of insertion and the greater trochanter
- Between tendon of insertion and vastus lateralis
- Overlying the ischial tuberosity
The muscle that is continuous with the iliotibial tract and assist the gluteus maximus in keeping the knee at extended position
Tensor fascia lata
Only muscle that passes through the greater sciatic foramen
Piriformis
Fan-shaped muscle that lies within the pelvis at its origin; muscle netween the gemellus inferior and superior
Obturator foramen
Muscle inferior to gemellus inferior
Quadratus femoris
Components of triceps coxae
Obturator internus
G. Superior
G. Inferior
Action of superficial gluteal muscles
Abductors and extenders
And also medial rotators for all except gluteus maximus, which assist in lateral rotation
These are the four superficial gluteal muscles
Gluteus maximus
Gluteus medius
Gluteus mininmus
Tensor fascia lata
Arterial supply for gluteus medius, tensor fascia lata and gluteus minimus
Superior gluteal artery
Arterial supply for gluteus maximus
Inferior gluteal artery
Action of deep gluteal muscles
Lateral rotators
These are the deep gluteal muscles
Piriformis
Obturator internus
Gemelli inferior and superior
Quadratus femoris
2 ligaments that support the sacroiliac joint
These ligaments prevent rotation of sacrum in the sacroiliac joint.
Sacrotuberous and sacrospinous ligaments
Structures or foramina formed by the sacrotuberous and sacrospinous ligaments
Greater and lesser sciatic foramen
Direction of structures that passes through the greater sciatic foramen
From pelvic to gluteal region
Direction of structures that passes through the lesser sciatic foramen
From gluteal region to perineum
Structures that passes through the lesser sciatic foramen
- Tendon of obturator internus
- Nerve to obturator internus
- Pudendal nerve
- Internal pudendal artery and vein
only nerve passing the greater sciatic foramen above the piriformis muscle
Superior gluteal nerve