ANAT 315 2/2 Flashcards
What is the pelvic girdle made up of?
Hip bone (innominate x2), sacrum and the coccyx
Innominate Bone
3 fused bones: Ilium, Pubis and Ischium
Features of the Ilium
-4 spines
-Iliac crest
-Iliac fossa
-Arcuate Line
-Greater sciatic notch
-Iliac tuberosity
-Auricular Surface
-Gluteal surface
-
Features of the Ischium
-Ischial Spine
-Lesser Sciatic notch
-Ischial Tuberosity
-Ischial Ramus
Features of the Pubis
-Pectineal Line
-Superior &Inferior Pubic ramus
-Symphyseal surface
-Body
Shared features of the Ischium, Ilium and Pubis
-Acetabulum (all 3)
-Obturator foramen (Pubis & Ischium)
-Ischiopubic ramus (pubis & Ischium)
-Iliopectineal line (ilium & pubis)
Difference between male and female pelvic girdles?
Females have wider space than males
Features of the sacrum
-Sacral ala
-Sacral Canal
-Posterior and Anterior Sacral Foramina
-Sacral Promontory
-Sacral Hiatus
-Auricular surface (shared with ilium)
where is Coccyx located
inferior of sacrum
What is the pelvic Inlet & what are its 3 borders?
superior opening of pelvis
Anterior border: pubic symphysis
Posterior border: Sacral promontory and ala
Lateral border: iliopectineal line
What is the pelvic Outlet & what are its 3 borders?
inferior opening of pelvis
Anterior border: Pubic arch
Posterior border: Coccyx
Lateral border: Ischial Tuberosity
True vs False Pelvis
False Pelvis: contains organs of lower abdomen
True Pelvis: between the inlet and outlet; where the viscera is located
Pubic Symphysis Joint
-fibrocartilaginous
-between pubis’
-connected by pubis symphysis on symphyseal surface
Sacroiliac Joint
-where sacrum and ilium articulate
-articulation at auricular surfaces
Sacroiliac Ligament
-attaches sacrum to ilium
Sacrospinous Ligament
-connects sacrum and Ischial Spine
-assists in supporting sacroiliac joint
Sacrotuberous Ligaments
-3 attachment points; posterior superior iliac spine, sacrum and the ischial tuberosity
Inguinal Ligaments
-does not support sacroiliac joint
-connects at anterior superior iliac spine and pubis
Sciatic Foramina
-Greater can be viewed anteriorly above the sacrospinous ligament
-lesser can be viewed anteriorly below the sacrospinous ligament and above the sacrotuberous ligament
Hip Joint
-articulation between innominate bone and femur
-synovial ball and socket joint
-triaxial
-more stable than mobile
Acetabulum
-Shared by the 3 fused bones
-socket that head of femur sits inside
Features of the Acetabulum
-lunate surface (inside)
-acetabular labrum (extends out for more stability
Femoral Head
contains fovea (attachment site for ligamentum teres)
Ligamentum Teres
-holds femoral head in acetabulum
3 supporting ligaments of the hip joint
Iliofemoral, Pubofemoral, Ischiofemoral
Iliofemoral Ligament
-connects Ilium to femur
-Y ligament
-prevents hyperextention
-in the middle of the other 2
Pubofemoral Ligament
-connects pubis to femur
-prevents excesstive abduction
-anterior of the 3
Ischiofemoral Ligament
-connects ischium to femur
-prevents hyperextenstion
-posterior of the 3
Features of the proximal femur
-head
-neck
-fovea
-Greater trochanter
-Trochanteric fossa
-Lesser trochanter
-Intertrochanteric crest
-Intertrochanteric line
-Gluteal Tuberosity
Function of pelvic floor
support pelvic viscera
Ischiococcygeus Origin
inferior end of sacrum
Ischiococcygeus. Insertion
ischial spine
Ischiococcygeus Action
supports pelvic viscera
Levator Ani Origin
**group of 3 muscles
pubis, superior pubic ramus
Levator Ani Insertion
anococcygeal ligament, coccyx
Levator Ani Action
supports pelvic viscera
2 hiatuses of pelvic floor
Anal (posteriorly) and Urogenetial (anteriorly)
Piriformis Origin
pelvic surface of sacrum
Piriformis Insertion
apex of the greater trochanter of the femur
Piriformis Action
Lateral rotation, abduction, and extension of hip joint
Sciatic nerve orgin
lumbosacral plexus (L4,L5,S1,S2,S3)
What is prirformis syndrome?
when piriformis muscle compresses sciatic nerve
Obturator Externus Origin
outer surface of obturator membrane
Obturator Externus Insertion
trochanteric fossa of the femur
Obturator Externus Action
Lateral rotation,and adduction of the hip joint
Obturator Internus Origin
inner surface of obturator membrane
Oturator Internus Insertion
medial surface of the greater trochanter of the femur
Obturator Internus Action
Lateral. rotation, adduction and extension of hip joint
Gemellus Superior Origin
Ischial Spine
Gemellus Superior Insertion
medial surface greater trochanter
Gemellus Superior Action
lateral rotation, adduction and extension of hip joint
Gemellus Inferior Origin
ischial tuberosity
Gemellus Inferior Insertion
medial surface greater trochanter
Gemellus Inferior Action
lateral rotation, adduction and extension of hip joint
Quadratus Femoris Origin
Lateral border of ischial tuberosity
Quadratus Femoris Insertion
interotrochanteric crest of femur
Quadratus Femoris Action
lateral rotation and adduction of the hip joint
Gluteus Maximus Origin
Sacrum, ilium, thoracolumbar fascia and sacrotuberous ligament
Gluteus Maximus Insertion
iliotibial tract, and gluteal tuberosity of femur
Gluteus Maximus Action
extension, lateral rotation and adduction
Gluteus Medius Origin
ilium
Gluteus Medius Insertion
greater trochanter of the femur
Gluteus Medius Action
abduction of the hip joint
Gluteus Minimus origin
ilium
Gluteus Minimus Insertion
greater trochanter of the femur
Gluteus Minimus Action
abduction of the hip joint
Tensor Fasciae Latae (TFL) origin
anterior superior iliac spine
Tensor Fasciae Latae (TFL) insertion
iliotibial tract
Femoral artery
-enters lower limb at inguinal ligament
-travels down anteromedial aspect of the thigh
-passes through adductor hiatus
-supplies the anterior thigh
Femoral artery branches
-profunda femoris (deep)
-Lateral circumflex femoral artery (LCFA)
-Medial circumflex femoral artery
Profunda Femoris
-passes between muscles of the medial compartment
-pierces the medial compartment muscle
-supplies blood to POSTERIOR THIGH
Lateral Circumflex femoral artery
-short branch of the deep femoral artery
-curves around the neck of femur =”circumflex”
-supplies blood to anterior thigh and hip joint
Medial circumflex femoral artery
-posteromedial branch of deep femoral artery
-courses around neck of femur
-emerges in gluteal region
-supplies blood to posterior thigh and hip joint
Blood supply of the thigh
-femoral artery
-femoral artery branches (profunda femoris, LCFA, MCFA)
Popliteal fossa arteries
- Popliteal artery
- Geniculate arteries
- Posterior recurrent tibial artery
- Anterior tibial artery
- Posterior tibial artery
Popliteal artery
-enters leg at the base of the popliteal fossa
-supplies blood: knee joint and superficial posterior leg
Posterior tibial recurrent artery
-branches laterally from popliteal artery
-moves superior = “recurrent”
-supplies blood: tibia and proximal end of fibula
Anterior tibial artery
-originates posteriorly
-branches laterally from popliteal artery
-pierces interosseous membrane towards anterior aspect of leg
anterior tibial arteries
-runs deep on top of interosseous membrane
-terminstes in the foot
-supplies blood to anterior leg
-branches into :anterior tibial recurrent artery
Anterior tibial recurrent artery
-moved back upwards
-terminates superiorly at the anterior knee joint
-supplies blood to knee joint
-branches off the anterior tibial artery
Posterior Tibial Arteries
-runs between the superficial and deep posterior muscle groups
-terminates in the foot
-supplies blood to posterior leg
Fibular artery
-branches off posterior tibial artery
-runs down parallel and lateral to tibial artery
-supplies blood to lateral leg and superficial posterior leg
DOrsum of the foot
-enters via anterior tibial artery
- ATA bifurcates a the dorsum of the foot into lateral tarsal artery and dorsalis pedis artery
-deep plantar artery branches posteriorly
-supplies digits and dorsum of foot
Plantar surface of the foot
-enters via the posterior tibial artery
-curves under the medial calcaneus
-supplies the plantar surface of the foot and digits
Veins of the foot
-anterior tibial veins
-great saphenous vein
-plantar venous network of the foot
-dorsal venous network of the foot
-posterior tibial veins
Veins of the leg
-popliteal vein
-great saphenous vein
-anterior tibial veins
-posterior tibial veins
-venous network of the foot
Great saphenous vein
-empties into the femoral vein
*medial