Foot anatomy and biomechanics Flashcards
plantar
bottom of foot
dorsal
top of foot
proximal
away from point of reference towards the trunk
distal
away from point of reference, towards the toes
tell me more about the fibula…
more lateral. peritoneal nerve can cause tingling like a funny bone. dont let a cast hit the fibular head.
Know the landmarks of the anterior and medial foot and ankle
posterior foot and ankle landmarks?
this would be a fair test question: is the medial malleolus higher or lower than the lateral malleolus?
Plantar foot landmarks?
What is the musculature of the anterior lower limb?
What is the musculature of the medial leg?
lateral leg musculature?
dorsal foot muscles and tendons
what are the three body planes?
sagittal
frontal
transverse
tell me more about the planes and how they relate to each other?
each is perpendicular to the other two
all together they correspond to three dimensions of space
result in dimensions of height, width and depth
What is the sagittal plane?
vertical plane passing through from front to back
divides into right and left halves
mid-sagittal cut divides body into equal/symmetric halves.
Tell me about the frontal plane?
same as coronal
vertical plane passing through the bodu from side to side
divides body between anterior and posterior faces
divides body into asymmetric halves
Transverse plane?
horizontal plane through the body from front to back
divides body from upper to lower halves ( superior divided from inferior)
divides body into equal, but asymmetric halves.
only the mid- sagittal cut makes a symmetrical cut.
What is the axis of motion and how is it defined?
it is always perpendicular to the plane in which the motion takes place
there are three axes of motion ( one vertical and two horizontal)
axis of motion is considered the proximal part while the motion takes place in the distal part. the axis is the line around which motion takes place.
axis of motionis is like a plane- think of a sheet of plexiglass
What is the front-sagittal axis?
Front - transverse axis
horizontal axis which passes from side to side and lies in the frontal transverse places. The axis of sagittal place motion. ( sagittal is the one not in the name and is perpendicular to these planes).
motion is taking place around this axis includes dorsiflexion and plantar flexion. flexion and extension of the leg ( up and down- following the sagittal plane)
Sagittal transverse axis ?
horizontal axis whcih passes from fron to back and lies in the sagittal and transverse planes. In the foot coincides with the longitudinal axis of the foot. The axis of FRONTAL plane motion.
motion: inversion and eversion of the foot as well as abduction and adduction of the leg. ( windmill of leg) and foot sweeping in and out along the sides ( follows frontal plane)
adduction of the foot = ?
motion in the transverse plane, around a vertical ( frontal -sagittal) axis in which the distal aspect of the foot moves toward the midline of the body.
think of the motion moving along the transverse plane towards the midline
what is abduction of the foot =?
motion in the transverse plane arounf the vertical ( frontal-sagittal) axis which the distal aspect of the foot moves away from the midline of the body.
Dorsiflection of the foot = ?
motion in the sagittal plane ( up and down) around a transverse-frontal axis in which the distal aspect of the foot moves dorsally , towards the tibia.
creates a smaller angle between dorsum of foot and tibia ( flexion)
plantar flexion of the foot is what?
motion of the sagittal plane around a transvere- frontal axis which the distal aspect of the foot moves plantarly, or away from the tibia.
Foot goes dowwards and extends. increased angle between dorsum and tibia
firing of the gastroc and solueus occurs
what is inversion of the foot ?
motion of the frontal plane around a transverse sagittal axis in whcih the plantar surface of the foot moves towards the midline of the body.
big toe swings towards the midline
frontal plane- think like a windmill
what is eversion of the foot?
motion in the frontal plane around the transverse sagitall axis in which the plantar surface of the foot moves away from the midline of the body.
just do it with your foot and see how the plantar surface points outwards
what are the transverse motions of the leg?
internal and extenal rotation ( kinda like adduction and abduction of the foot)
what is the frontal plane of motion for the leg?
abduction and adduction
think about a wind mill.. bring the whole leg outwards or inwards.
what is the sagittal motion of the leg?
flexion and extension of the leg
think about leg moving up and down along sagittal plane
this might include walking motions… leg flexing and extending.
what are examples of tri-plane motions of the foot?
pronation and supination
require all three planes,
components in each plane
of these component motions- none can take place independent of the other two
this is a complex movement
this is an axis of motion that is deviated in those who have flat feet (orthotic or surgery may be required to address the correct plane of motion that is defected)
what is the difference between open kinetic chain vs closed kinetic chain?
open: motions that occur in joints that DOES NOT bear weight
closed: the body joint that DOES bear weight
maybe still google this
What is the fixed structural variation of an adductus foot?
facing inwards = pigeon toed
transverse fixation with the distal end displaced toward the midline.
What is the fixtured structural abductus of the foot?
fixed facing outward
transverse fixation with the distal end displaced away from the midline
( e.g hallux abductus valgus- big toes fixated in abduction)
fixed stuctural variation of the foot in varus?
what is the fixed variation of the foot in valgus?
fixed structural variation - equinas?
fixation of upper part of foot or part of foot in the position if plantar flexed. The distal end of the part is further away from the tibia.
spencer mann- always walked on his toes.
fixed structural variation - calcaneus?
much more rare to have a person walking on their heels.
fixation of the foot or part of the foot in the postion it would assume if dorsiflexed. This causes the dorsal end to be closer to tibia.
could be related to cerebral palsy or neuro dysfunction
fixed structural variation- Talipes?
refers to hereditary defects which change the position of the entire foot
deformity can be talus, calcaneus or both
e,g, Club foot
hereditary- equnio ( sagittal) and varus ( frontal)
Tell me about the ankle joint axis
observe alignment: check out the posterior portion of frontal plane … may be slight deviation from transverse plane ( ankle tipping in or out)
observe movement: sagitta- up down = primary, but also transverse- side to side ( secondary)
AXis: tri- plane motion, however most analogous with sagittal motion.
Tell me about the subtalar joint axis?
tell me about the midtarsal joint axis?
tell me about the first ray axis?
tell me about the gait cycle?
When evaluating radiographs…
- identify view
- purpose of view
- review alignment related to joint axis
understanding/observing the pathology determined the procedure we will do