chapter17 pelvis ligaments Flashcards
define the joint capsule
Attaches
Proximally - around lip of acetabulum
Distally - neck of femur
Forms a cylindrical sleeve
Encloses the joint and most of the femoral neck
define the function of the acetabulum labrum
increases depth of acetabulum
Fibrocartilaginous
Located around the rim
Surrounds the femoral head
Assists in holding the head in the acetabulum
define the iliofemoral ligament
Reinforces capsule anteriorly
From anterior inferior iliac spine splits attaches to intertrochanteric line
Limits hyperextension
HELPS a Person maintain upright posture with little to no muscle strength if the hips are hyperextended
define the pubofemoral ligament
spans hip medially and inferiorly
Limits hyperextension and abduction
From medial acetabular rim and superior ramus of pubis to neck of femur
define the ischiofemoral function
Covers the capsule posteriorly
Limits hyperextension and medial rotation
From ischial portion of acetabulum to neck of femur
what do the all the hip ligaments do ?
All attach along rim of acetabulum to femoral neck
Cross hip joint in a spiral fashion
Results:
Limiting hyperextension (taut)
Allowing flexion (slack)
Enables standing upright without use of muscles
A patient with weak hip extensors and knee extensors can use the
iliofemoral ligament to assist them in standing upright by hyperextending at the hip
define the function of the ligamentum teres
Attaches:
Proximally in acetabulum
Distally in fovea of the femoral head
Debatable importance
Contains a blood vessel to supply head of femur
? Taut in adduction or lateral rotation when hip semiflexed
define the inguinal ligament ?
Runs from:
Anterior superior iliac spine
Pubic tubercle
Landmark separating the anterior abdominal wall from the thigh
When external iliac artery and vein pass under the inguinal ligament
Names change to the femoral artery and vein
define the iliotibial band
Attaches:
Anterior portion of the iliac crest
Runs superficially down lateral side of thigh
Attaches to tibia
Insertion for fibers of:
Gluteus maximus
Tensor fascia latae
the ligaments are slack when and the end feels is
hip flexion open packed and is soft end feel
the ligaments are taut when
hip extension, closed packed and end feel is firm
what types of joint is the hip
ball and socket joint 3 degrees of movement
what are the degrees of adduction
25
what are the degrees of abdcution
45
