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39 terms

Lower extremity

lower extremity
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os coxa
aka hip bone, is formed by the fusion of 3 bones
1. ilium
2. ischium (ISS-kee-um)
3. pubis
pelvic girdle
the two os coxae are fused posterior to the sacrum and coccyx and this forms the pelvic girdle
ilium
one of three bones to form the os coxa

largest and most superior
ischium
(ISS-kee-um)
one of three bones to form the os coxa

lowest portion of os coxa

posterior, inferior portion of the pelvis
pubis
one of three bones to form the os coxa

anterior portion of the os coxa
acetabulum
(ASS-AHTAB-yahlum)
the 3 os coxa bones come together to form a cup-like structure

this cup on the lateral surface holds the ball-shaped head of the femur.

hip socket
greiliac crest
superior margin of the ilium. when placing hands on hips they rest on the iliac crests
sacroiliac joint
(SAK-ro-IL-ee-ak)
the posterior of the ilium articulates w/the sacrum at the sacroiliac joint
sacrum
triangular bone that is formed by 5 fused vertebrae. this vertebrae and the 2 os coxa form the pelvis.

the sacrum articulates with these bones at the sacroiliac joints
coccyx
the most inferior portion of the vertebral column

articulates superiorly w/the sacrum
anterior superior iliac spine/process
higher projection on the lateral end of the iliac crest
anterior inferior iliac spine/process
lower projection on the lateral end of the iliac crest

the projection ends just above the superior edge of the acetabulum
posterior superior iliac spine/process
a projection on the posterior medial surface of each ilium, at the medial end of the iliac crest
posterior inferior spine/process
the projection is below the the posterior superior iliac spine/process
greater sciatic notch
just below the posterior inferior iliac spine
symphysis pubis
(SIM-fie-sis)
a cartilaginous joint wherer the pubis (pubic) bones of each side meet
obturator foramen
(FORAY-mahn)
large hole in the anterior surface of the coxal bone, formed by the pubis and ischium
ischial tuberosity
(ISS-kee-um)
a rough projection on the lower portion of the ischium

body rests on when sitting
ischial spine
(ISS-kee-um)
pointed projection just above the ischial tuberosity
femur
bone of the thigh
head of femur
rounded ball-like head
greater trochanter
(TRO-kan-tur)
a large process that projects superiorly from the junction of the neck and shaft of the femur
lesser trochanter
a smaller projection on the medial surface of the femur
medial condyle
large rounded process on the medial distal end of the femur
lateral condyle
large rounded process on the lateral distal end of the femur
patella
the bond that forms the kneecap
tibia
larger bone on the medial side of the lower leg, aka=shin bone
medial condyle of tibia
large process on the medial proximal end of tibia

articulates w/ the medial condyle of the femur
lateral condyle of tibia
large process on the lateral proximal end of tibia

articulates w/ the lateral condyle of the femur and the head of the fibula
tibial tuberosity
roughened protrusion just below the condyles on the ANTERIOR surface of the tibia
medial malleolus
(mah-LEE-oh-lus)
a large bony prominence on the medial surface of the distal end of the tibia
fibula
the smaller bone on the lateral side of the lower leg
head of fibula
enlargement on the proximal end of the fibula
lateral malleolus
(mah-LEE-oh-lus)
bony projection on the lateral surface of the distal end of the fibula
tarsals
ankle bones
calcaneus
(kal-KAY-nee-us)
heel bone, largest of the tarsals
talus
the large bone on the top of the foot
metatarsals
the instep of the foot
phalanges
toes of the foot