Biomechanics & Anatomy Flashcards
(22 cards)
Talo-crural Joint - Classification & DF
Modified Sellar (hinge/saddle joint) 1 DF: DF/PF
TCJ Osteo/Arthrokinematics
DF = Posterior glide of talus
PF = Anterior glide of talus
Conjunct Rotation = Lateral w/DF, Medial w/PF
TCJ Capsular Pattern
PF > DF
TCJ CPP
WB DF, talus conjunct ER
TCJ Resting Position
10 deg PF
Subtalar (STJ) or Talocalcaneal - Classification & DF
2 modified ovoid joints
Functional = modified Sellar with 1 DF = inversion/eversion
STJ Osteo/Arthrokinematics
Inversion 5-20 deg
Eversion 5-10 deg
Anterior joint (calcaneus moving on talus) = medial glide anterior (small), lateral glide posterior (larger)
Posterior joint - acts like a pivot (similar to radio-ulnar joint)
STJ Capsular Pattern
Limited Inversion
STJ CPP
WB eversion (pronation/flat foot)
STJ Resting Position
Mid-position
Talonavicular Joint Classification & DF
Classification = modified ovoid
2 DF = PF/DF, Inv/Ev
- navicular presents as con cavity so glide is in same direction if moving navicular on talus
Talonavicular Capsular Pattern
DF, PF, Add, Medial rotation
Talonavicular CPP
WB pronation
Talons vicuña Resting Position
Mid-position
Calcaneocuboid Joint - Classification & DF
Modified Sellar
1 DF = inversion/eversion
Calcaneocuboid Joint - Osteo/Arthrokinematics
Inversion/eversion
Calcaneocuboid Capsular Pattern
?? Loss of plantar Flexion/adduction
Calcaneocuboid CPP
WB pronation
Calcaneocuboid Resting Position
Mid-position
Biomechanical Exam of Foot/Ankle
Raise up on toes Half squat with heels down Twist right & left -- look at arches & calcanei -- strength of gastric/soleus -- WB DF/PF
Ankle/Foot: Medial Ligaments
Deltoid
Spring (plantarcalcaneonavicular ligament)
Short plantar
Medial Talocalcaneal
Ankle/Foot: Lateral Ligaments
ATFL CF PTFL Bifurcate Ligament Anterior Interosseous Cubonavicular Dorsal Cuboid 4th & 5th metatarsal ligaments