Saturday, January 17, 2004

Foot Posture Index

This was originally develeoped by Tony Redmond as a means to overcome some of the limitations of previous methods of quantifying posture of the foot.
We have two recent publications in which we used it in:
Static Stance Response to Different Types of Foot Orthoses
The Reliability of the Manual Supination Resistance Test

Another 2 papers from the University of South Australia has just appeared look more at the FPI validity:
Criterion Validation of Four Criteria of the Foot Posture Index
Reliability of the Foot Posture Index and Traditional Measures of Foot Position

My opinion on the Foot Posture Index (FPI):
We use it a lot in research. We use it a lot as part of the inclusion criteria for our orthotic studies (eg we may only recruit those with a Foot Posture Index greater than, say, 6 --> this probably indicates that these people would have probably got foot orthotics if they had symptoms related to a pronated foot --> anything >4-5 on the Foot Posture Index is a pronated foot). The the end of the day, the Foot Posture Index is good for what it is designed for. Like a lot of tools its not good for what it is not designed for.

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Foot Posture Index

This was originally develeoped by Tony Redmond as a means to overcome some of the limitations of previous methods of quantifying posture of the foot.
We have two recent publications in which we used it in:
Static Stance Response to Different Types of Foot Orthoses
The Reliability of the Manual Supination Resistance Test

Another 2 papers from the University of South Australia has just appeared look more at the FPI validity:
Criterion Validation of Four Criteria of the Foot Posture Index
Reliability of the Foot Posture Index and Traditional Measures of Foot Position

My opinion on the Foot Posture Index (FPI):
We use it a lot in research. We use it a lot as part of the inclusion criteria for our orthotic studies (eg we may only recruit those with a Foot Posture Index greater than, say, 6 --> this probably indicates that these people would have probably got foot orthotics if they had symptoms related to a pronated foot --> anything >4-5 on the Foot Posture Index is a pronated foot). The the end of the day, the Foot Posture Index is good for what it is designed for. Like a lot of tools its not good for what it is not designed for.

Back to home

Wednesday, December 31, 2003

Intrinsic pedal musculature support of the medial longitudinal arch: An electromyography study

Just came across this study from the recent Journal of Foot and Ankle Surgery:

The authors did this (I have edited the abstract for brevity):
Ten adults served as subjects. The height of the navicular tubercle above the floor was measured while subjects were seated with the foot in a subtalar neutral position and then when standing in a relaxed calcaneal stance. Recordings of muscle activity from the abductor hallucis muscle were performed while the subjects maintained a maximal voluntary contraction in a supine position by plantarflexing their great toes. An injection of lidocaine (1% with epinephrine) was then administered in the region of the tibial nerve, posterior and inferior to the medial malleolus. Measurements were repeated and compared by using a paired t test. After the nerve block, the muscle activity was 26.8% of the control condition (P = .011). This corresponded with an increase in navicular drop of 3.8 mm. (P = .022). The observation that navicular drop increased when the activity of the intrinsic muscles decreased indicates that the intrinsic pedal muscles play an important role in support of the medial longitudinal arch.

This will make a good study to give to the students ... notice anything wrong reaching the conclusion of indicates that the intrinsic pedal muscles play an important role in support of the medial longitudinal arch based on the methodology used? I have no doubt that the intrinsic muscles are important, but they do not even start contracting during gait until the heel begins to come of the ground - the study tested the intrinsic muscles with the heel on the ground ... to quote CK ... what say you?

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Intrinsic pedal musculature support of the medial longitudinal arch: An electromyography study

Just came across this study from the recent Journal of Foot and Ankle Surgery:

The authors did this (I have edited the abstract for brevity):
Ten adults served as subjects. The height of the navicular tubercle above the floor was measured while subjects were seated with the foot in a subtalar neutral position and then when standing in a relaxed calcaneal stance. Recordings of muscle activity from the abductor hallucis muscle were performed while the subjects maintained a maximal voluntary contraction in a supine position by plantarflexing their great toes. An injection of lidocaine (1% with epinephrine) was then administered in the region of the tibial nerve, posterior and inferior to the medial malleolus. Measurements were repeated and compared by using a paired t test. After the nerve block, the muscle activity was 26.8% of the control condition (P = .011). This corresponded with an increase in navicular drop of 3.8 mm. (P = .022). The observation that navicular drop increased when the activity of the intrinsic muscles decreased indicates that the intrinsic pedal muscles play an important role in support of the medial longitudinal arch.

This will make a good study to give to the students ... notice anything wrong reaching the conclusion of indicates that the intrinsic pedal muscles play an important role in support of the medial longitudinal arch based on the methodology used? I have no doubt that the intrinsic muscles are important, but they do not even start contracting during gait until the heel begins to come of the ground - the study tested the intrinsic muscles with the heel on the ground ... to quote CK ... what say you?

Back to home

Wednesday, December 24, 2003