Hip During Gait Flashcards
SAGITTAL: How much ROM does the hip have at initial contact?
- 30 degrees of hip flexion
- 20 degrees of thigh flexion
SAGITTAL: How much ROM does the pelvis have at initial contact in regards to tilting?
about 10 degrees of anterior tilt
SAGITTAL: How much ROM does the pelvis have during the whole gait cycle in regards to tilting?
- very minimal
- only about 2-4 degrees of pelvic tilt
SAGITTAL: Where is the ground reaction force in relation to the hip at initial contact?
anterior
SAGITTAL: What kind of external torque does the GRF make at the hip during initial contact?
external flexion torque
SAGITTAL: What kind of internal torque is occurring at the hip during initial contact?
internal extension torque to counteract the external flexion torque
SAGITTAL: What hip muscles are working during initial contact?
ALL extensor muscles are working
-mainly gluetus max and adductor magnus
SAGITTAL: What is the functional significance of initial contact?
- limb positioning for step length
- limb stabilization
REVIEW: describe loading response…GO!
- 0-10% of the gait cycle
- start: initial contact
- end: opposite toe off
- functional significance: weight acceptance
SAGITTAL: How much ROM does the hip have during loading response?
- hip doesn’t move during this phase
- hip stays in 30 degrees of flexion (20 degrees of thigh flexion)
SAGITTAL: Where is the GRF in relation to the hip during loading response?
GRF is still anterior to the hip joint
SAGITTAL: What kind of external torque does the GRF make at the hip during loading response?
external flexion torque
SAGITTAL: What kind of internal torque is occurring at the hip during loading response?
internal extension torque
SAGITTAL: What hip muscles are working during loading response and how are they working?
- glut. max, adductor magnus, hamstrings
- all are working isometrically because there is no movement at the hip during this phase
SAGITTAL: What is the functional significance of loading response at the hip?
- hip stabilization
- trunk posture maintained
- shock absorption is still occurring
REVIEW: describe what is going on in mid stance…GO!
- 10-30% of the gait cycle
- start: opposite toe off
- end: reference limb heel rise
- functional significance: single limb support
SAGITTAL: How much ROM does the hip have during mid stance?
- starts at 30 degrees of hip flexion
- ends in 10 degrees of flexion (thigh is at 0)
- overall movement is going into 20 degrees of extension
SAGITTAL: Where is the GRF in relation to the hip joint at the end of mid stance?
posterior
SAGITTAL: What kind of external torque does the GRF create at the hip during mid stance?
external extension torque
SAGITTAL: What kind of internal torque is occurring at the hip during mid stance?
internal flexion torque????
SAGITTAL: What kind of muscle activity is there during mid stance?
- the hip extensors work concentrically at the beginning of the phase because they are shortening
- they stop working towards the end of the phase because the GRF goes posterior to the hip joint
SAGITTAL: What is the functional significance of mid stance at the hip?
- hip stability
- forward progression of head, arms, and trunk
SAGITTAL: What is providing hip stability during mid stance?
passive forces which includes the anterior hip joint capsule (counteracts the external extension torque) and the weight of the body wanting to put you into extension
REVIEW: describe what is going on in terminal stance…GO!
- 30-50% of the gait cycle
- start: reference heel rise
- end: opposite initial contact
- functional significance: single limb support
SAGITTAL: How much ROM does the hip have during terminal stance?
- starts at 10 degrees of flexion
- ends in 10 degrees of hip extension (20 degrees of thigh extension)
- 20 degrees of total movement going into extension
- this is maximal extension
SAGITTAL: Where is the GRF in relation to the hip during terminal stance?
posterior
SAGITTAL: What kind of external torque is occurring during terminal stance?
external extension torque due to gravity activity acting on the weight of the body
SAGITTAL: What kind of muscle activity is there during terminal stance?
anterior fibers of the tensor fascia lata (TFL) are working because the anterior capsule can’t handle that much extension
SAGITTAL: What is the functional significance of terminal stance at the hip?
- hip stability
- forward progression
- maximize contralateral step length (trailing limb posture)
REVIEW: describe what is going on in pre-swing…GO!
- 50-60% of the gait cycle
- start: opposite initial contact
- end: reference toe off
- functional significance: limb advancement
SAGITTAL: How much ROM does the hip have during pre swing?
- starts at maximal extension (10 degrees of hip extension)
- ends in 0 degrees of hip flexion (10 degrees of thigh extension)
- total movement of 10 degrees going into flexion
SAGITTAL: Where is the GRF in relation to the hip during pre swing?
GRF is still posterior but is decreases because you are getting ready for single limb support
SAGITTAL: What kind of external torque is occurring during pre swing?
external extension torque but it is decreasing because you are going into single limb support
SAGITTAL: What kind of muscle activity is there during pre swing?
- adductor longus: doesn’t help too much because gravity and what is going on at the ankle and knee does most of the work
- rectus femoris: only in some patients