Biomechanics
What type of joint is the hip
ball and socket
This is stretched during flexion and adduction-- location is fovea capitis
ligamentum teres
Femoral anteversion
Toe-in, higher internal rotation, decreased external rotation,
Is abduction/ adduction OCK or CKC?
Both
OKC. Abduction- rolling lateral and gliding medial
CKC. Adbuction- acetabulum rolling and sliding superior/ lateral
What is the the innominate bone made up of?
ilium, pubis, ischium
What connects to the AIIS?
rectus femoris
What 2 muscles attach to the greater trochanter
piriformis, glut medius
This ligament is a primary anterior stabilizer
ilifemoral ligament
What happens in OKC and CKC of external rotation
OKC- roll lateral and glide medial
CKC- acetabulum rolling and gliding medial
What is the pelvis made up of?
left and right innominate bones that connect anteriorly at the pubic symphysis and posterior at sacrum
What connects to the psis?
glute max
Prime hip flexor?
iliopsoas
Taut with full abduction and extension
pubofemoral
What are hip flexors/ hip extensors
flexors- rectus femoris, iliopsoas, sartorius, tensor fascia latae
extensors- gluteus maximus, hamstrings (semiten. and semimem.), biceps femoris, IT band
What is the longest and strongest bone in the body?
Attachments of the hip posteriorly at the ischial tuberostiy
adductor magnus, biceps femoris, semitendonosis, semimembranosus
What happens when the angle of inclination increases?
coxa valga-- increase abductor demand and decreased stability
What happen in OKC of the hip
convex femoral head on concave acetabulum; when flexing, the femoral head rolls anterior while the acetabulum glides posterior
As hip extensors get ______ we move into hip extension
weaker
What articulates with the acetabulum?
3 ligaments associated with the hip
ilifemoral ligament, pubofemoral ligament, ischiofemoral ligament
Is femoral torsioning higher in men or women? at what degrees?
Women- 18 (men-15)
What happens in CKC?
concave on convex- Pelvis/ acetabulum moving on femur
Do internal rotation movements increase or decrease with hip flexion
increase