Pelvis and hip joint Flashcards
What type of joint is the pelvic and hip joint
Ball and socket hip joint where head of femur articulates with acebular fossa of pelvic girdle
What is the function of the pelvis and hip joint
Supports weight of body that is transmitted through vertebral column, through sacroiliac joint to pelvis down femur and to feet
How is the pelvis and hip joint important in walking and running?
Slightly rotatory movement
hip flexion and posterior pelvic tilt
hip extension and anterior pelvis tilt
downward tilt on swing side
Describe the bones of the pelvis
Right and left pelvic bones joined posteriorly by sacrum - sacroiliac joints
Join anteriorly at pubic symphysis
3 component of the pelvic
Ilium (mainly superior area)
Ishium (posterior and inferior area)
Pubis (anterior and inferior area)
The femur
Largest longest and strongest bone in the bone
Head articulates with acetabular fossa
Mechanical axis of the femur
line connecting the centre of the femoral head with the centre of the knee joint - almost vertical
Shaft of femur acts medially
Places centre of the knee joint nearly under the centre of motion of hip joint
Greater trochanter
attachment for muscle causing abduction and extension of femur
Lesser trochanter
Attachment for muscles causing internal rotation of femur
Linea aspera
Long prominent ridge of the posterior aspect
Shaft is smooth rounded surface except for this
Posterior attachment for muscles
Name the factors which contribute to the stability of the hip
eep socket to hold femoral head securely Acetauar labrum (deepens fossa which increases stability) Strong dense ligamentous network surrounding joint Muscles crossing the joint
What is the function of the joint capsule
Helps to provide stability to the joint ,
Some of the ligaments and surrounding musculature becomes continuous with the capsule
Iliofemoral ligament
very strong, thick triangular shape on the anterior aspect
runs from the acetabular rim to the intertrochanteric line
Pubofemoral
strengthens anterior and inferior aspects
Blends with the inferior band of the iliofemoral ligament
Ischiofemoral
posterior, spriral shaped fibres on posterior aspect
runs from ischium behind and below the acetabulum to superior part of neck and greater trochanter