MAJOR EVENT OF MUSCLE FUNCTION HIGH YIELD Flashcards
the following below all occur during contact period, specifically, deceleration of ankle joint plantarflexion at heel strike:
anterior tibialis with assistance from the EHL does this?
EHL dysfunction does what?
decelerates ankle plantarflexion at heel strike
no appreciable symptomology
the following below all occur during contact period, specifically, deceleration of ankle joint plantarflexion at heel strike:
anterior tibialis dysfunciton results in this condition?
foot slap at heel contact
the following below all occur during contact period, specifically, forefoot loading (lateral to medial):
anterior tibialis inverts (supinates) this
forefoot around LMTJ
the following below all occur during contact period, specifically, forefoot loading (lateral to medial):
as weight is transferred to forefoot, these push on lateral side of forefoot?
GRFs
the following below all occur during contact period, specifically, deceleration of STJ pronation and interval leg rotation:
what is important to note as the leg is internally rotating and STJ is pronating during contact?
posterior tibialis is first to decelerate STJ pronation and internal leg rotation
the following below all occur during contact period, specifically, deceleration of STJ pronation and interval leg rotation:
The PT exerts strongest and longest deceleration force during what period?
contact period
the following below all occur during contact period, specifically, deceleration of anterior momentum of leg:
so here we need muscle function to decelerate forward momentum of tibia to keep from falling and this muscle serves as the primary decelerator of anterior momentum of tibia during the last half of contact?
posteror tibialis m (PT)
midstance period
this muscle is responsible for the external rotation of the femur?
gastroc m
midstance period
these muscles are the agonists and accelerate STJ supination and external leg rotation
what are the antagonists?
posterior calf muscles
(PT, soleus, FDL, FHL)
peroneus longus and brevis
which muscle is the strongest pronator?
which muscles control rate and extent of STJ supination during midstance
peroneus brevis
peroneals
what muscles accomplish deceleration?
PT m
soleus m
FHL
FDL, with help from peroneus longus
why does the gastroc maintain flexion tension at the knee?
to prevent uncontrolled extension and if dysfunctional, hyperextension occurs
stabilization of the bones of the metatarsus includes what rays?
1-4 rays
so in the propulsive period, what are the 3 factors that enable this?
forward momentum of the body
deceleration of tibia
active knee flexion
this muscle is the only muscle that has the requirement to stabilize the forefoot during propulsion transversely?
transverse pedis m
these muscles are primary for lifting lateral side of the forefoot transferring weight from lateral to medial?
peroneus longus and brevis
what are the factors that influence stability of the hallux?
stability and plantarflexion of 1st ray**
normal sesamoid function
normal strength and fxn of muscles involved in stability of hallux and 1st ray
this muscle plantar flexes 1st ray at this time to stabilize 1st met head against sesamoids?
abductor hallucis m
this muscle during the swing phase is an important neutral dorsiflexor of the foot?
EHL
