09-06 The Hip Flashcards
1
Q
Bones of the Hip Joint
A
- Proximal Femur
- Pelvis
2
Q
Bones of the Pelvis (Inominate Bones)
A
- Ilium
- Ischium
- Pubic Bone
3
Q
Articulation of inominate bones
A
- Anterior: Pubic Symphysis
- Posterior: Sacrum via sacroiliac jts
4
Q
Femur Characteristics
A
- Angle of Inclination: 125˚
- Angle of torsion: 8˚-25˚, avg angle 12˚
5
Q
Hip joint - Characteristics
A
- Ball-and-socket triaxial jt
- Acetabulum + Head of Femur
- Reinforced by iliofemoral, pubofemoral, and ischiofemoral ligaments
- Two hip jts linked through pelvis and to vertebrae through SI and L/S jts
6
Q
Hip joint - Articular surfaces
A
- Concave: Acetabulum
- Acetabulum faces laterally, anteriorly, and inferiorly
- Convex: Head of femur
- Femur faces medially, anteriorly, and superiorly
7
Q
Hip joint - Ligaments
A
- Iliofemoral (Anterior)
- Pubofemoral (Anterior)
- Ischiofemoral (Posterior)
8
Q
Iliofemoral Ligament
A
- Anterior pelvis
- Also known as Y ligament of Bigelow
- Strongest of hip ligaments
- Limits Hip ER
9
Q
Pubofemoral Ligament
A
- Anterior Pelvis
- Limits Hip ABDts
10
Q
Ischiofemoral Ligament
A
- Posterior pelvis
- Limits Hip IR; ADD (when hip flexed)
11
Q
Hip Joint - Arthrokinematics (Femoral Head)
A
- Vex on Cave
- FLEX: Ant Roll, Post Glide
- EXT: Post Roll, Ant Glide
- ABD: Lat Role, Inf Glide
- ADD: Med Roll, Sup Glide
- ER: Lat Roll, Ant Glide
- IR: Med Roll, Post Glide
12
Q
Hip Joint - Arthrokinematics (Pelvis)
A
- Cave on Vex
- LE stabilized distally (closed chain), acetabulum moves on femoral head, so glides same direction as pelvis
- Motion at both hip jts, L/S
13
Q
Balance strategies
A
- Reflex muscle contractions of the entire kinematic chain
14
Q
Motions of femur/muscle function
A
- Three planes
- Flexion/Extension (sagittal); ABD/ADD (frontal); IR/ER (transverse)
15
Q
Motions of pelvis/muscle function
A
- Movement at hip jts and L/S
- Pelvic contraction, reverse action
- Stabilized by trunk to prevent excessive motion
