Gait- Single Limb Support

Mid Stance 12-30%

The body progresses over a single stable limb

Mid Stance Critical Event

Controlled tibial advancement

What is the angle of anterior tilt of the pelvis during the mid-stance phase of gait?

15 degree anterior tilt

During the mid-stance phase of gait, what is the angle of hip typically observed?

0 degree

What is the primary joint angle at the knee during mid-stance in the sagittal plane?

3-5 degree flexion

What is the primary joint angle at the ankle during mid-stance in the sagittal plane?

5 degree dorsiflexion

During mid-stance in the sagittal plane, what is the ground reaction force direction at the ankle?

Anterior

What is the primary external moment at the ankle during mid-stance?

Dorsiflexion

In the sagittal plane during mid-stance, what is the primary type of muscle activity at the ankle?

Eccentric Plantarflexors Gastro and Soleus

During mid-stance in the sagittal plane, what is the primary ground reaction force direction at the knee?

Posterior to Anterior

What is the primary external moment at the knee during mid-stance?

Flexion to Extension

What is the primary type of muscle activity at the knee during mid-stance in the sagittal plane?

Concentric Knee Extensors Quads (during flexion moment, none during extension)

In the sagittal plane during mid-stance, what is the primary ground reaction force direction at the hip?

Anterior to Posterior

During mid-stance in the sagittal plane, what is the primary external moment at the hip?

Flexion to Extension

What type of muscle activity is observed in the hip during mid-stance?

Passive resistance as the hip is extending by momentum

Terminal Stance 30-50%

The body moves ahead of the stance limb and weight is transferred onto the forefoot

Terminal Stance Critical Event

Controlled ankle dorsiflexion with heel rise, trailing limb posture

What is the angle of anterior tilt of the pelvis during the terminal stance phase of gait?

16 degree anterior tilt

During the terminal stance phase of gait, what is the angle of hip typically observed?

20 degree extension

What is the primary joint angle at the knee during terminal stance in the sagittal plane?

0-5 degree flexion

What is the primary joint angle at the ankle during terminal stance in the sagittal plane?

10 degree dorsiflexion

During terminal stance in the sagittal plane, what is the ground reaction force direction at the ankle?

Anterior

What is the primary external moment at the ankle during terminal stance?

Dorsiflexion

In the sagittal plane during terminal stance, what is the primary type of muscle activity at the ankle?

Concentric Plantarflexors Gastro and Soleus

During terminal stance in the sagittal plane, what is the primary ground reaction force direction at the knee?

Anterior moves Posterior just before CL IC

What is the primary external moment at the knee during terminal stance?

Extension moves to Flexion just before CL IC

What type of muscle activity is observed in the knee during terminal stance?

Decreasing extension moment then increasing flexion moment initiates pre-swing flexion

In the sagittal plane during terminal stance, what is the primary ground reaction force direction at the hip?

Posterior

During terminal stance in the sagittal plane, what is the primary external moment at the hip?

Flexion to Extension

What type of muscle activity is observed in the hip during terminal stance?

Passive resistance by anterior hip structure