Gait Flashcards
what is heel strike?
instant heel contacts the ground
what is loading response?
From heel contact to foot flat
Phase continues until contralateral limb lifts off ground
what is mid stance ?
From foot flat position until the body above is supported over the weight bearing limb
Begins when contralateral extremity lifts off the grounf
What is terminal stance?
From mid stance through heel off the WB extremity
From mid stance until initial contact of contralateral extremity
what is presswing?
From hell off until toe off of the WB extremity
what is initial swing?
from toe off until maximum knee flexion of ipsilateral extremity (thigh perp to floor)
what is midswing?
From Max knee flexion until tibia is in a vertical position
what is terminal swing?
From vertical tibia position until just before initial contact of the ipsilateral extremity
during initial contact/ heel strike what is the ankle / TC joint doing?
Neutral
Sagittal plane
during initial contact / heel strike what is the subtalar joint doing?
supinated
during initial contact / heel strike what are the toes doing?
15° extension
during loading response / foot flat what is the ankle doing?
PF 15° (= 15° PF IC to LR)
during loading response / foot flat what is the subtalar joint doing?
Begins pronation (GRF lateral to ICR)
during loading response / foot flat what are the toes doing?
Flexing
during mid stance what is the ankle doing?
5-10° DF (= 20-25° DF from LR through MS)
during mid stance what is the subtalar joint doing?
LR through MS completes pronation
Supination begins at MS & is complete by end of mid stance
during mid stance what are toes doing?
Neutral
during terminal stance / heel off what is the ankle doing?
Neutral (=5° PF to neutral from mid stance through terminal stance)
during terminal stance / heel off what is the subtalar joint doing/
Supinated or supinating
during terminal stance / heel off what is the toes doing?
extension to 30°
During preswing / Toe off what is the ankle doing?
PF to 20°
During preswing / Toe off what is the subtalar joint doing?
supinated
During preswing / Toe off what are the toes doing?
50-60° extension
During initial swing / acceleration what is the ankle doing?
10 ° PF (= 10° DF from Preswing through initial swing)
During initial swing / acceleration what is the subtalar joint doing?
supinated
During initial swing / acceleration what are the toes doing?
Flexing
During midswing what is the ankle doing?
neutral
During midswing what is the subtalar joint doing?
Supinated
During midswing what are the toes doing?
neutral
During terminal swing / Deceleration what is the ankle doing?
Neutral
During terminal swing / Deceleration what is the subtalar joint doing?
supinated
During terminal swing / Deceleration what are the toes doing?
15° extension
what is the muscle contraction of ankle happens during loading response?
Eccentric Tibilais Anterior
what is the muscle contraction of ankle during mid stance?
Eccentric triceps surae
what is the muscle contraction of ankle during terminal stance?
Concentric triceps surae
what is the muscle contraction of ankle during preswing?
Concentric triceps surae
what is the muscle contraction of ankle during initial swing?
Concentric Tibialis Anterior
what is the muscle contraction of ankle during midswing?
Concentric Tibialis Anterior
what is the muscle contraction of ankle during terminal swing?
Isometric Tibilas Anterior
what is the interaction of the ankle/foot during initial contact through loading response?
Knee Flexion, TC PF, Subtalar pronation
Shortening of extremity preventing preventing an abrupt rise in COM after heel strike
W/O occurrence would see sharp rise in COM as tibia glides over talus
what is the interaction of knee, ankle/foot during mid stance through terminal stance?
COM is lowering
Smooth transition via knee extension, TC PF, subtalar supination towards heel off
Slows descent of COM by a relative lengthening of stance limb