Gait Flashcards
What is the muscle activation patten during Heel strike/ Initial contact.
The knee extensors are active at heel strike through early stance to control small amounts of knee flexion, for shock absorption. Ankle dorsiflexors decelerate the foot, slowing the plantar flexion from heel strike.
What is the muscle activation patten during Foot Flat/Loading Response
The Gastroc-soleus muscles are active from foot flat through midstance to eccentrically control forward tibial advancement.
What is the muscle activation patten during Midstance?
Hip, knee, and ankle extensors are active throughout stance to oppose antigravity forces and stabilize the limb. Hip extensors control forward motion of the trunk. Hip abductors stabilize the pelvis during unilateral stance.
What is the muscle activation patten during Heel off/ Terminal Stance.
Peak activity of plantar-flexors occurs just after heel-off to push-off and generates forward propulsion of the body.
What is the muscle activation patten during Toe off/ Pre Swing.
Hip and knee extensors (Hams and Quads) may contribute to forward propulsion with brief burst of activity
What is the muscle activation patten during Acceleration/ Initial swing.
Forward acceleration of the limb during early swing is achieved through the brief action of quadriceps. By midswing the quads are silent and pendular motion is in effect. Hip flexors (iliopsoas) aid in forward limb propulsion
What is the muscle activation patten during Midswing.
Foot clearance is achieved by contraction of the hip flexors, knee flexors, and ankle dorsiflexors
What is the muscle activation patten during Deceleration/ Terminal Swing.
Hamstrings act during late swing to decelerate the limb in preparation for heel strike. Quads and ankle dorsiflexors become active in late swing to prepare for heel strike.
