Ch. 7 Femur and Pelvic Girdle Flashcards
longest and strongest bone in the body
femur
proximal femur consists of 4 essential parts:
head, neck, greater trochanter, and lesser trochanter
depression/pit near the center of the head of the femur
fovea capitis
fovea capitis provides attachment for what
ligament of the head of the femur/ligament capitis femoris
strong, pyramidal process of bone that connects the head with the body or shaft in the region of the trochanters on the femur
neck
larger prominence located superiorly and laterally to the femoral shaft and is palpable as a bony landmark
greater trochanter
smaller, blunt, conical eminence that projects medially and posteriorly from the junction of the neck and shaft of the femur
lesser trochanter
the trochanters are joined posteriorly by a thick ridge called
intertrochanteric crest
what is the angle of the neck to the shaft of a femur on an average adult
125 degrees with variation of 15 degrees
in a long legged person with a narrow pelvis how would the angle of the femur change
femur would be more vertical, increasing angle of neck (140)
in a shorter person with a wider pelvis how would the angle of the neck of the femur change
angle would be less (110-115)
on an average adult in the anatomic position, the longitudindal plane of the femur is
10 degrees from vertical
what does the vertical angle of the femur look like on a shorter person with a wide pelvis
more of a vertical angle (15 degrees)
what does the vertical angle of the femur look like on a taller person with a narrow pelvis
less of an angle from vertical (5 degrees)
how is the head and neck of the femur placed in relation to the body of the femur
15-20 degrees anteriorly angled
how must the patient be positioned in order to get the femoral neck parallel to the IR and get a true AP projection of the proximal femur
femur and lower leg rotated 15-20 degrees internally
serves as the base of the trunk and forms the connection between the vertebral column and lower limbs
complete pelvis
what four bones do the pelvis consists of
2 hip bones (innominate bones/ossa coxae), sacrum, coccyx
what does the sacrum articulate with superiorly
5th lumbar vertebra
what does the sacrum and 5th lumbar vertebra form
lumbosacral joint (L5-S1 joint)
the right and left hip (iliac) bones articulate posteriorly with what
sacrum
what does the right and left hip (iliac) bones and the sacrum form
sacroiliac joints
which two bones are also considered part of the distal vertebral column
sacrum and coccyx
3 divisions of the hip bones
ilium, ischium, pubis
when do your hip bones fuse together as one bone
middle teens
what area does the fusion of the 3 sections of the hip bone occur
area of the acetabulum
deep, cup-shaped cavity that accepts the head of the femur to form the hip joint
acetabulum
largest of the 3 divisions of the hip bone
ilium
section of the hip bone located superior to the acetabulum
ilium
section of the hip bone located inferior and posterior to the acetabulum
ischium
section of the hip bone located inferior and anterior to the acetabulum
pubis
the ilium is composed of what
a body and an ala/wing
what part of the ilium is the body
more inferior portion near the acetabulum, includes the superior 2/5ths of the acetabulum
thin flared superior part of the ilium
wing/ala of the ileum
superior margin of the ala
crest of the ilium, extending from ASIS to posterior superior iliac spine (PSIS)
upper most peak of the crest of the ilium
iliac crest
below the ASIS is a less prominent projection referred to as
anterior inferior iliac spine
inferior to the PSIS
posterior inferior iliac spine
two important positioning landmarks on the ilium
iliac crest and ASIS
part of the hip bone that lies inferior and posterior to the acetabulum
ischium
what is the ischium divided into
body and a ramus
superior portion of the body of the ischium makes up this
posteroinferior 2/5ths of the acetabulum
the lower portion of the body of the ischium is formerly called what
superior ramus
portion of the ischium that projects caudally and medially from the acetabulum, ending at the ischial tuberosity
lower portion of the body of the ischium
projecting anteriorly from the ischial tuberosity
ramus of the ischium
rounded roughened area near the junction of the lower body and the inferior rami is a landmark called
tuberosity of the ischium; ischial tuberosity
posterior to the acetabulum is a bony projection termed what
ischial spine